Relevant bibliographies by topics / Bio Kinetics

Academic literature on the topic 'Bio Kinetics'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Bio Kinetics.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Bio Kinetics"

1

L Salami, DO Olumuyiwa, EA Alfred, and OS Olakanmi. "Kinetic modelling of dumpsite leachate treatment using Musa sapientum peels as bio-sorbent." Global Journal of Engineering and Technology Advances 9, no. 2 (November 30, 2021): 024–31. http://dx.doi.org/10.30574/gjeta.2021.9.2.0117.

Full text
Abstract:
Kinetics models are very vital to dumpsite operators and planners as they provide relevant information for effective treatment of leachates. The aim of this work is to model the kinetic process of treatment of Lagos dumpsite leachate using Musa sapientum peels as bio-sorbent with a view of establishing the kinetic parameters of the treatment process. Musa sapientum peels which were collected from Ayetoro market in Epe Local Government area of Lagos State were used to prepare the bio-sorbent. Kinetic process was carried out using 1 g of the prepared bio-sorbent in 100 ml Lagos dumpsite leachate in different conical flasks and at various contacting time. The kinetic data obtained were fitted to different kinetics models. The kinetics models tested were Fractional power model, Lagregren pseudo first – order model, Pseudo second – order model, Kuo – Lotse kinetic model, Blanchard kinetic model and Elovich kinetic model. Other kinetics models considered were Sobkowsk – Czerwi kinetic model, Intraparticle diffusion (IPD) model, Behnajady – Modirshahla – Ghanbery (BMG) model and Diffusion – Chemisorption model. Coefficient of determination (R2) values and the expected nature of the plots of the models were used to screen the tested models. The results revealed that the Pseudo second – order kinetic model has the best R2 value of 0.99996 and the graph followed the expected nature of the plot hence it was adopted in this work. It was concluded that Pseudo second – order kinetic model can be used to navigate the treatment process of Lagos dumpsite using Musa sapientum peels as bio-sorbent.
APA, Harvard, Vancouver, ISO, and other styles
2

Zheng, Yue, Yanyu Zhao, Junjun Xu, and Ke Tang. "Affections of dynamic ductility and molecular friction for kinetic properties of bio-molecules in multidimensional landscape model." AIP Advances 12, no. 6 (June 1, 2022): 065111. http://dx.doi.org/10.1063/5.0094358.

Full text
Abstract:
Because of affections from fluctuation, the migration or reaction rate of bio-molecules is mainly related to the time-memory effect. This kinetic phenomenon is primarily dominated by dynamic ductility and molecular crowding in the solvent. These two important elements directly connect with the affections of the random force and systematic friction (ζ) in a real solvent. They can affect fluctuation characteristics of bio-molecules. Properties of bio-molecular kinetics are mainly submitted to the configuration quality and random collision. The multidimensional landscape must be needed in typical research processes for kinetics of bio-molecules. The random collision affection in the x dimension and the typical ductility for the free-energy surface in the Q dimension have been abstracted in our work. The two-dimensional generalized Langevin equation including fractional Gaussian noise or white noise is used to study the migration rate or the mean waiting time. The essential quality of the bio-molecules’ kinetic properties can be revealed by the comparative study between dynamic disorder (DD) and common diffusion. We have found that there are sharp dynamic differences between DD and normal kinetics. Moreover, dynamic ductility and solvent friction can lead to great affections to the bio-molecular dynamics.
APA, Harvard, Vancouver, ISO, and other styles
3

Mohanty, Mohit Prakash, Bharati Brahmacharimayum, and Pranab Kumar Ghosh. "Effects of phenol on sulfate reduction by mixed microbial culture: kinetics and bio-kinetics analysis." Water Science and Technology 77, no. 4 (December 18, 2017): 1079–88. http://dx.doi.org/10.2166/wst.2017.630.

Full text
Abstract:
Abstract Mixed microbial culture collected from the wastewater treatment plant of Indian Institute of Technology Guwahati (IITG) was further grown in anaerobic condition in presence of sulfate where lactate was added as a carbon source. Sulfate addition was increased stepwise up to 1,000 mg l−1 before phenol was added at increasing concentrations from 10 mg l−1 to 300 mg l−1. Kinetics of sulfate, phenol and chemical oxygen demand reduction were studied and experimental findings were analyzed using various bio-models to estimate the bio-kinetic coefficients. This is the first detailed report on kinetics and bio-kinetic studies of sulfate reduction in presence of phenol. Experimental results showed that there was no inhibition of sulfate reduction and microbial growth up to 100 mg l−1 phenol addition. However, inhibition to different degrees was observed at higher phenol addition. The experimental data of microbial growth and substrate consumption in presence of phenol fitted well to the Edward model (R2 = 0.85, root mean square error = 0.001011) with maximum specific growth rate = 0.052 h−1, substrate inhibition constant = 88.05 mg l−1 and half saturation constant = 58.22 mg l−1. The characteristics of the cultured microbes were determined through a series of analysis and microbial tests.
APA, Harvard, Vancouver, ISO, and other styles
4

Sembodo, Bregas Siswahjono Tatag, Hary Sulistyo, Wahyudi Budi Sediawan, and Mohammad Fahrurrozi. "Kinetics study on non-isothermal thermochemical liquefaction of corncobs in ethanol-water solution: Effect of ethanol concentration." MATEC Web of Conferences 197 (2018): 09005. http://dx.doi.org/10.1051/matecconf/201819709005.

Full text
Abstract:
Corncobs are potentially processed into bio-oil through thermochemical liquefaction processes. It is difficult to construct kinetics models based on the compounds involved in the reaction. It would be made four kinetic models based on four reaction products, i.e., solids, bio-oil, gas and volatile products. The purposes of the study were to seek kinetics model of thermochemical liquefaction of corncobs in ethanol-water solution and to study the effect of ethanol concentration. The experiment of liquefaction processes of corncobs in ethanol-water solution using sodium carbonate catalyst was performed in the 150 ml autoclave equipped with a magnetic stirrer in the temperature up to 280°C. Four kinetic models were applied to predict the yield of four reaction product lumps. The calculation results were compared to the experimental data. Compared to the others, model 4 was the most realistic and closely matching to the experimental data. In model 4 the reaction mechanism was assumed that biomass (corncobs) first decomposed into bio-oil, followed by decomposition of bio-oil into volatile products reversibly and, finally, volatile products decomposed into gaseous products. The yield of bio-oil increased from 42.05% to 54.93% by increasing to ethanol concentration of 0% to 40%.
APA, Harvard, Vancouver, ISO, and other styles
5

Ruggeri, Bernardo, Guido Sassi, and Vito Specchia. "A holistic view of (bio)kinetics." Chemical Engineering Science 49, no. 24 (1994): 4121–32. http://dx.doi.org/10.1016/s0009-2509(05)80010-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Lente, Gábor. "Mathematics in (bio)chemical kinetics 2017." Reaction Kinetics, Mechanisms and Catalysis 123, no. 2 (February 22, 2018): 287–88. http://dx.doi.org/10.1007/s11144-018-1382-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Matsumoto, M., and Y. Hasegawa. "Enzymatic Kinetics of Solvent-free Esterification with Bio-imprinted Lipase." Chemical & biochemical engineering quarterly 33, no. 4 (2020): 495–99. http://dx.doi.org/10.15255/cabeq.2019.1692.

Full text
Abstract:
To avoid the use of compounds that burden the environment, a solvent-free enzymatic<br /> reaction was the focus of this study. Investigated were the catalytic activities and kinetics of lipases that were pretreated with carboxylic acids for the solvent-free esterification of propionic acid with isoamyl alcohol. The enhancements of the esterification yields and rates by the bio-imprinting effects of carboxylic acids were observed. We found no inhibition of isoamyl alcohol on the solvent-free enzymatic esterification, and obtained a large imprinting effect under a largely excessive amount of isoamyl alcohol to propionic acid. From the kinetic analysis, the imprinting of lipases mainly enhanced the catalytic reaction rate constant rather than the affinity between lipase and propionic acid compared with untreated lipase. The bio-imprinting treatment of lipase is found to be very effective for the yield and kinetics in solvent-free esterification.
APA, Harvard, Vancouver, ISO, and other styles
8

Hyder, A. H. M. G., Shamim A. Begum, and Nosa O. Egiebor. "Sorption studies of Cr(VI) from aqueous solution using bio-char as an adsorbent." Water Science and Technology 69, no. 11 (March 22, 2014): 2265–71. http://dx.doi.org/10.2166/wst.2014.143.

Full text
Abstract:
The characteristics of sorption of hexavalent chromium (Cr(VI)) onto bio-char derived from wood chips (spruce, pine, and fir) were evaluated as a function of pH, initial Cr(VI) concentration and bio-char dosage using synthetic wastewater in batch tests. The initial Cr(VI) concentrations were varied between 10 and 500 mg/L to investigate equilibrium, kinetics, and isotherms of the sorption process. About 100% of Cr(VI) was removed at pH 2 with initial Cr(VI) concentration of 10 mg/L using 4 g of bio-char after 5 hours of sorption reaction. The maximum sorption capacity of the bio-char was 1.717 mg/g for an initial Cr(VI) concentration of 500 mg/L after 5 hours. The sorption kinetics of total Cr onto bio-char followed the second-order kinetic model. The Langmuir isotherm model provided the best fit for total Cr sorption onto bio-char. The bio-char used is a co-product of a down draft gasifier that uses the derived syngas to produce electricity. Bio-char as a low cost adsorbent demonstrated promising results for removal of Cr(VI) from aqueous solution. The findings of this study would be useful in designing a filtration unit with bio-char in a full-scale water and wastewater treatment plant for the Cr(VI) removal from contaminated waters.
APA, Harvard, Vancouver, ISO, and other styles
9

Lascano, Diego, Luis Quiles-Carrillo, Rafael Balart, Teodomiro Boronat, and Nestor Montanes. "Kinetic Analysis of the Curing of a Partially Biobased Epoxy Resin Using Dynamic Differential Scanning Calorimetry." Polymers 11, no. 3 (February 27, 2019): 391. http://dx.doi.org/10.3390/polym11030391.

Full text
Abstract:
This research presents a cure kinetics study of an epoxy system consisting of a partially bio-sourced resin based on diglycidyl ether of bisphenol A (DGEBA) with amine hardener and a biobased reactive diluent from plants representing 31 wt %. The kinetic study has been carried out using differential scanning calorimetry (DSC) under non-isothermal conditions at different heating rates. Integral and derivative isoconversional methods or model free kinetics (MFK) have been applied to the experimental data in order to evaluate the apparent activation energy, Ea, followed by the application of the appropriate reaction model. The bio-sourced system showed activation energy that is independent of the extent of conversion, with Ea values between 57 and 62 kJ·mol−1, corresponding to typical activation energies of conventional epoxy resins. The reaction model was studied by comparing the calculated y(α) and z(α) functions with standard master plot curves. A two-parameter autocatalytic kinetic model of Šesták–Berggren [SB(m,n)] was assessed as the most suitable reaction model to describe the curing kinetics of the epoxy resins studied since it showed an excellent agreement with the experimental data.
APA, Harvard, Vancouver, ISO, and other styles
10

Zhang, Ruixia, Zhaoping Zhong, and Yaji Huang. "Combustion characteristics and kinetics of bio-oil." Frontiers of Chemical Engineering in China 3, no. 2 (March 10, 2009): 119–24. http://dx.doi.org/10.1007/s11705-009-0068-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Bio Kinetics"

1

Hyder, A. H. M. Golam. "Sorption Characteristics of Hexavalent Chromium [Cr(VI)] onto Bone Char and Bio-char." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171833.

Full text
Abstract:
The sorption characteristics of hexavalent chromium [Cr(VI)] onto bone char and bio-char were evaluated as a function of pH, initial Cr(VI) concentration, and dosages of bone char and bio-char. Batch tests were conducted by using synthetic wastewater in this study. The effects of various initial Cr(VI) concentrations between 5 mg/L and 1000 mg/L were evaluated using bone char as a sorbent. A Cr(VI) removal efficiency of 100 % was achieved at pH 1 with 2 g of bone char in 50 mL of solution at 3 hours of reaction time using initial Cr(VI) concentration of 10 mg/L. About 100 % of Cr(VI) was removed at pH 2 with initial Cr(VI) concentrations of 10 mg/L using 4 g of bio-char in 200 mL of solution at 5 hours of reaction time. The initial Cr(VI) concentrations were varied between 10 mg/L and 500 mg/L when bio-char was used as the sorbent. The maximum sorption capacities of bone char and bio-char were determined to 6.46 mg Cr(VI)/g, and 1.717 mg Cr(VI)/g, respectively. Equilibrium, kinetics, and isotherms of the sorption process were also investigated. The sorption kinetics of Cr(VI) onto bone char and bio-char followed the second order kinetic model suggesting that the sorption reaction rate depends on two parameters, which might be the sorbate concentration and sorbent dosage. The Langmuir isotherm model was the best one for the description of sorption of Cr(VI) onto bone char and bio-char.
APA, Harvard, Vancouver, ISO, and other styles
2

Conradi, Carsten. "Multistationarity in (bio)chemical reaction networks with mass action kinetics model discrimination, robustness and beyond." Aachen Shaker, 2008. http://d-nb.info/989018172/04.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Gu, Xiangyu. "Molten-salt Catalytic Pyrolysis (MSCP): A Single-pot Process for Fuels from Biomass." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-theses/504.

Full text
Abstract:
A novel process for single-pot conversion of biomass to biofuels was developed called the molten salt catalytic pyrolysis (MSCP) method. The proposed single-pot MSCP process proved to be an inherently more efficient and cost-effective methodology for converting lignocellulosic biomass. In this study, several parameters that affect yield of bio-oil were investigated including carrier gas flow rate; pyrolysis temperature; feed particle size; varying types of molten salt and catalysts. Use of molten salt as the reaction medium offered higher liquid yield and experiments containing ZnCl2 showed higher yield than other chloride salts. The highest yield of bio-oil was up to 66% obtained in a ZnCl2-KCl-LiCl ternary molten salt system compared with 32.2% at the same condition without molten salts. In addition, the effect of molten salt on the composition of bio-oil was also studied. It was observed that molten salt narrowed the product distribution of bio-oil with furfural and acetic acid as the only two main components in the liquid with the exception of water. Finally, a thermogravimetric kinetic study on the pyrolysis of biomass in MSCP was conducted.
APA, Harvard, Vancouver, ISO, and other styles
4

Conradi, Carsten [Verfasser]. "Multistationarity in (bio)chemical reaction networks with mass action kinetics: model discrimination, robustness and beyond / Carsten Conradi." Aachen : Shaker, 2008. http://d-nb.info/1162791837/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Williams, Alexander W. "An investigation of the kinetics for the fast pyrolysis of loblolly pine woody biomass." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41093.

Full text
Abstract:
In the search for fossil fuel alternatives the production of bio-oil through the pyrolysis of biomass is one method which has shown evidence of scalability, meaning that the technology could be scaled up for the processing of biomass on the order of tons per day. Pyrolysis is the thermal degradation of compounds in the absence of oxygen. Of particular interest is the pyrolysis of sustainable energy crops such as Loblolly pine (Pinus taeda). The goal of this study is to develop a new method of characterizing the fast pyrolysis of biomass for the advancement of reactor design. The objectives are to determine bulk kinetic coefficients for the isothermal fast pyrolysis of biomass, evaluate the interchangeability of fast and slow pyrolysis kinetic parameters and compare generally accepted pyrolysis mechanisms derived from a common data set. A technical objective is to apply the most suitable derived kinetic parameters to model pyrolysis within a moving bed reactor. A novel fast pyrolysis micro-reactor is presented along with its design and development process. The micro-reactor allows for the control over both temperature and residence time of the reacting biomass. This system provides the experimental data for the characterization of biomass pyrolysis kinetic parameters. Thermal validation tests are presented and experimental yield results are given for raw Loblolly Pine, Avicel cellulose and Beechwood xylan for the derivation of kinetic descriptors. Cellulose and xylan results show good agreement with literature when the proper experimental conditions are met and whole wood pyrolysis results clearly demonstrate the dissimilarity between fast and slow pyrolysis apparent kinetic rates. The experimental results are then used to evaluate five different pyrolysis kinetic model configurations: single component global pyrolysis, two component global pyrolysis, product based pyrolysis, pseudo-component based pyrolysis and pseudo-component pyrolysis with an intermediate solid compound. Pseudo-component models are of particular interest because they may provide a generalized model, parameterized by the fractional composition of cellulose, hemicellulose and lignin in biomass species. Lignin pyrolysis yields are calculated to evaluate the suitability of a pseudo-component parallel non-competing superposition pyrolysis model. Lignin yields are estimated by taking the difference between whole wood pyrolysis and predicted cellulose and hemicellulose pyrolysis behaviors. The five models are then evaluated by comparison of predicted yields to the results for the pyrolysis of Scots pine (Pinus sylvestris) and Norway spruce (Picea abies). Model evaluations show that pseudo-component superposition is not suitable as a generic pyrolysis model for the fast pyrolysis of biomass observed using the micro-reactor. Further analytical evaluations indicate that the assumption of parallel non-competing reactions between pseudo-components is not valid. Among the other models investigated the intermediate solid compound model showed the best fit to the verification experimentation results followed closely by the two component global model. Finally, the derived kinetic parameters are applied to the design of moving bed vacuum pyrolysis reactors which provide for the separation of heat and mass transfer pathways, resulting in the reduction of char entrainment and secondary reactions within collected bio-oils. Reaction kinetics and porous bed heat and mass transfer are accounted for within the bed model. Model development and predictive results are presented and sensitivity to activation energy variations investigated.
APA, Harvard, Vancouver, ISO, and other styles
6

Chen, Wei. "The force regulation on binding kinetics and conformations of integrin and selectins using a bio-membrane force probe." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/33814.

Full text
Abstract:
Cell adhesion plays an important role in inflammation and immunological responses. Adhesion molecules (e.g., selectins and integrins) are key modulators in mediating these cellular responses, such as leukocyte trafficking under shear stress. In this thesis, we use a bio-membrane force probe (BFP) to study force regulation on kinetics and conformations of selectin and LFA-1 integrin. A new BFP was built up, and a new assay, using thermal fluctuation of the BFP, was developed and used to monitoring selectins and their ligands association and dissociations. The new BFP was also used to investigate the force and force history dependence of selectin-ligand interactions. We found tri-phasic transition of force-dependent off-rates and force-history dependence of selectin/ligaind interactions. The BFP was also used to characterize force-dependent lifetimes of the LFA-1-ICAM-1 interaction. We found that LFA-1/ICAM-1 bonds behaved as catch bond and that LFA-1-ICAM-1's catch bonds were abolished blocking the downward movement of αA domain α7 helix. Finally, the BFP was applied to dynamically probe the global conformational changes of LFA-1 and to characterize force-regulated transitions among different conformational states on a living cell. We observed dynamic transitions of LFA-1 between extended and bent conformations on living cells. The observed average distance change of LFA-1's extensions was about 18nm, while that of the bending was only about 14nm. We also found that forces could facilitate extension but they slow down the bending of LFA-1. The observed transition time of extension was less than 0.1s, while that of contraction was longer than 0.2s. Our observations here are the first in-situ evidence to demonstrate how integrins dynamically transit different conformations and how force regulates these transitions.
APA, Harvard, Vancouver, ISO, and other styles
7

Bakharieva, Ganna, Serhii Petrov, and Tetiana Falalieieva. "Development of the mathematical model of the kinetics of the stationary process of bio-cleaning with substratic inhibition." Thesis, Scientific Route OU, 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/46262.

Full text
Abstract:
A scientifically sound method for calculating the parameters of bio-cleaning should contain as a basic a reliable mathematical description of the stationary process. The results of stationary laboratory experiments are presented in the coordinates “specific rate of destruction V – concentration ρ”. Statistical processing proves the presence of substrate inhibition for both gaseous and soluble and dissolved harmful substances in water. For an analytical description of the dependence of the biooxidation rate on the concentration of contaminants, a phenomenological approach is applied, taking into account in a simple form two obvious phenomena: the contact of a microorganism with a substrate molecule and the inhibitory effect of the medium on it. The numerical values of empirical dependency coefficients for the studied processes are calculated. A differential equation is proposed at the macro level that describes the kinetics of biochemical destruction. The concept of a macrokinetic mathematical model of bioremediation is defined as a system of two functions that quantitatively reflect the dependence of the specific oxidation rate of pollution on its concentration and concentration on time, as well as satisfying the relationship between the relationships of the same parameters in differential form. The dependence of concentration on time is defined both in the form of a numerical integration algorithm and in the form of an approximate formula. The adequacy and universality of the proposed model for the studied processes is proved. The advantage of the proposed model of substrate inhibition kinetics is the simplicity of the structure of the basic formula and the ease of determining empirical coefficients based on this. In addition to numerical integration for determining the time of destruction, an approximate analytical solution is found, which can be adequately used in the concentration range of the experimental study. Further research is aimed at developing methods for calculating non-stationary processes in biochemical purification plants of certain specific types.
APA, Harvard, Vancouver, ISO, and other styles
8

Bashir, Abdala A. "Bio-based Resins and Fillers for Use in Thermosetting Composites." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1574463236644168.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Pedrosa, Marcelo Mendes. "Bio-?leo e biog?s da degrada??o termoqu?mica de lodo de esgoto dom?stico em cilindro rotativo." Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15915.

Full text
Abstract:
Made available in DSpace on 2014-12-17T15:01:53Z (GMT). No. of bitstreams: 1 MarceloMP_TESE_Parte 1.pdf: 4026465 bytes, checksum: b5bd28c043dc6252575ad902899bb6a6 (MD5) Previous issue date: 2011-12-22
The objective of this study was to produce biofuels (bio-oil and gas) from the thermal treatment of sewage sludge in rotating cylinder, aiming industrial applications. The biomass was characterized by immediate and instrumental analysis (elemental analysis, scanning electron microscopy - SEM, X-ray diffraction, infrared spectroscopy and ICP-OES). A kinetic study on non-stationary regime was done to calculate the activation energy by Thermal Gravimetric Analysis evaluating thermochemical and thermocatalytic process of sludge, the latter being in the presence of USY zeolite. As expected, the activation energy evaluated by the mathematical model "Model-free kinetics" applying techniques isoconversionais was lowest for the catalytic tests (57.9 to 108.9 kJ/mol in the range of biomass conversion of 40 to 80%). The pyrolytic plant at a laboratory scale reactor consists of a rotating cylinder whose length is 100 cm with capable of processing up to 1 kg biomass/h. In the process of pyrolysis thermochemical were studied following parameters: temperature of reaction (500 to 600 ? C), flow rate of carrier gas (50 to 200 mL/min), frequency of rotation of centrifugation for condensation of bio-oil (20 to 30 Hz) and flow of biomass (4 and 22 g/min). Products obtained during the process (pyrolytic liquid, coal and gas) were characterized by classical and instrumental analytical techniques. The maximum yield of liquid pyrolytic was approximately 10.5% obtained in the conditions of temperature of 500 ?C, centrifugation speed of 20 Hz, an inert gas flow of 200 mL/min and feeding of biomass 22 g/min. The highest yield obtained for the gas phase was 23.3% for the temperature of 600 ?C, flow rate of 200 mL/min inert, frequency of rotation of the column of vapor condensation 30 Hz and flow of biomass of 22 g/min. The non-oxygenated aliphatic hydrocarbons were found in greater proportion in the bio-oil (55%) followed by aliphatic oxygenated (27%). The bio-oil had the following characteristics: pH 6.81, density between 1.05 and 1.09 g/mL, viscosity between 2.5 and 3.1 cSt and highest heating value between 16.91 and 17.85 MJ/ kg. The main components in the gas phase were: H2, CO, CO2 and CH4. Hydrogen was the main constituent of the gas mixture, with a yield of about 46.2% for a temperature of 600 ? C. Among the hydrocarbons formed, methane was found in higher yield (16.6%) for the temperature 520 oC. The solid phase obtained showed a high ash content (70%) due to the abundant presence of metals in coal, in particular iron, which was also present in bio-oil with a rate of 0.068% in the test performed at a temperature of 500 oC.
O objetivo deste trabalho foi produzir biocombust?veis (bio-?leo e g?s), a partir do tratamento t?rmico do lodo de esgoto dom?stico em cilindro rotativo, visando aplica??o industrial. A biomassa foi caracterizada por an?lise imediata e instrumental (An?lise Elementar, Microsc?pica Eletr?nica de Varredura - MEV, Difra??o de Raios-X, Espectroscopia no Infravermelho, ICP-OES). Um estudo cin?tico, em regime n?o estacion?rio foi realizado para o c?lculo da energia de ativa??o por An?lise T?rmica Gravim?trica avaliando os processos termoqu?micos e termocatal?ticos do lodo, sendo este ?ltimo na presen?a da ze?lita USY. Como esperado, a energia de ativa??o avaliada pelo modelo matem?tico "Model-free kinetics" aplicando t?cnicas isoconversionais foi menor para os ensaios catal?ticos (57,9 108,9 kJ/mol, no intervalo de convers?es da biomassa de 40 ? 80%). A planta pirol?tica, em escala de laborat?rio ? constitu?da de um reator de cilindro rotativo cujo comprimento ? 100 cm, com capacidade de processar at? 1 Kg biomassa/h. No processo da pir?lise termoqu?mica foram estudados os seguintes par?metros: temperatura da rea??o (500 ? 600 ?C), vaz?o do g?s de arraste (50 ? 200 mL/min), freq??ncia de rota??o de centrifuga??o (20 ? 30 Hz) para condensa??o do bio-?leo e vaz?o m?ssica de biomassa (4 e 22 g/min). Os produtos obtidos durante o processo (l?quido pirol?tico, carv?o e g?s) foram caracterizados atrav?s de t?cnicas anal?ticas cl?ssicas e instrumentais. O rendimento m?ximo de l?quido pirol?tico foi da ordem de 10,5% obtido nas condi??es de temperatura de 500 ?C, rota??o da centrifuga??o de 20 Hz, vaz?o de g?s inerte de 200 mL/min e vaz?o m?ssica de biomassa 22 g/min. O maior rendimento obtido para a fase gasosa foi de 23,3 %, para a temperatura da rea??o de 600 oC, vaz?o de inerte 200 mL/min, freq??ncia de rota??o da coluna de condensa??o de vapores 30 Hz e vaz?o m?ssica de biomassa de 22 g/min. Os hidrocarbonetos alif?ticos n?o oxigenados foram encontrados em maior propor??o no bio-?leo (55%) seguido pelos compostos alif?ticos oxigenados (27%). O bio-?leo apresentou as seguintes caracter?sticas: pH 6,81, densidade entre 1,05 e 1,09 g/mL, viscosidade entre 2,5 e 3,1 cSt e poder calor?fico superior entre 16,91 e 17,85 MJ/kg. Os principais componentes obtidos na fase gasosa foram: H2, CO, CO2, CH4. O hidrog?nio foi o principal constituinte da mistura gasosa, com rendimento da ordem de 46,2 %, para a temperatura de 600 oC e, dentre os hidrocarbonetos formados, o metano foi encontrado em maior rendimento (16,6 %) para a temperatura 520 oC. A fase s?lida obtida apresentou elevado teor de cinzas (70%), devido ? presen?a abundante de metais no carv?o, em particular, o ferro, o qual esteve tamb?m presente no bio-?leo com um percentual de 0,068 % no ensaio realizado na temperatura de 500 oC
APA, Harvard, Vancouver, ISO, and other styles
10

DANTAS, FILHO Francisco Ferreira. "Estudo do bio-óleo e carvão obtido a partir do lodo de tratamento de esgoto sanitário por conversão à baixa temperatura." Universidade Federal de Campina Grande, 2013. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1782.

Full text
Abstract:
Submitted by Maria Medeiros (maria.dilva1@ufcg.edu.br) on 2018-09-24T13:47:14Z No. of bitstreams: 1 FRANCISCO FERREIRA DANTAS FILHO - TESE (PPGEP) 2013.pdf: 1757426 bytes, checksum: 5a54b650a305bfccca48540f2323f279 (MD5)
Made available in DSpace on 2018-09-24T13:47:14Z (GMT). No. of bitstreams: 1 FRANCISCO FERREIRA DANTAS FILHO - TESE (PPGEP) 2013.pdf: 1757426 bytes, checksum: 5a54b650a305bfccca48540f2323f279 (MD5) Previous issue date: 2013-04-20
CNPq
O presente trabalho discorre sobre uma alternativa para mitigar o problema do Lodo de Esgoto Sanitário – LES. Esse resíduo influencia negativamente de várias formas o meio ambiente, destacando-se a poluição das águas superficiais e subterrâneas. Teve como objetivo utilizar a biomassa presente no LES para a produção de combustíveis (Bio-óleo e Carvão). Tratou-se de um estudo experimental com a biomassa obtida na Estação Experimental de Tratamento Biológico de Esgotos Sanitários – EXTRABES, localizada na cidade de Campina Grande – PB. O experimento foi realizado em duas etapas: a primeira correspondente ao estudo termogravimétrico e cinético do LES; a segunda, a obtenção do bio-óleo e carvão oriundo da pirólise do LES, realizado no LABCON, instalado na Universidade Federal Fluminense – UFF. Os resultados obtidos do estudo termogravimétrico nas três razões de aquecimento 5,10 e 15ºC.min-1, constatam uma estabilidade térmica a 30ºC sobre atmosferas de ar sintético e N2. No estudo cinético determinaram-se os seguintes parâmetros: Energia de Ativação (Ea), Fator de frequência (A-1), Desvio padrão (sd) e o Coeficiente linear (r), que foram calculados por termogravimetria pelos métodos Coats-Redfern (CR); Madhusudanan (MD); Van Krevelen (VK) e Horowitz-Metzger (HM). Os espectros de FTIR da amostra do LES apresentaram bandas referentes à água, matéria orgânica e óxidos de silício. O bio-óleo foi obtido através do processo da conversão à baixa temperatura, em atmosfera de nitrogênio, atingindo 380°C com tempo de detenção de 2h. O proc esso de pirólise do LES resultou em 9% de bio-óleo, 57% de carvão e 34% de água de pirólise. Observou-se que o bio-óleo obtido é uma mistura complexa de hidrocarbonetos alifáticos, aromáticos, esteróides, compostos oxigenados e nitrogenados, que foi identificada pelas técnicas FTIR, RMN 1H, CG-EM. O carvão apresentou baixa área superficial, não sendo considerado potencialmente bom suporte catalítico, tanto pela metodologia de Langmuir, SLANG 0,748 m2.g-1 quanto por BET, SBET = 0,695m2.g-1. Os resultados confirmam que à Conversão à Baixa Temperatura é uma técnica promissora, tanto para o destino do LES, quanto para obtenção de biocombustíveis.
The present study discusses an alternative to mitigate Sewage Sludge – SS problem. This residue adversely affects the environment in various ways, highlighting pollution of surface and groundwater. It aimed to use the biomass present in the SS for fuel production (Biooil and coal). It was an experimental study with biomass obtained from the Estação Experimental de Tratamento Biológico de Esgotos Sanitários – EXTRABES, located in the city of Campina Grande – PB. The experiment was conducted in two stages: first corresponding to thermogravimetric and kinetic study of the SS; second, obtainment of biooil and coal originated from the pyrolysis of SS, conducted at LABCOM, installed at the Fluminense Federal University – FFU. The results obtained from the thermogravimetric study in the three heating rates 5, 10 and 15oC min-1, found a thermal stability at 30°C on atmospheres of synthetic air and N2. In the kinetic study the following parameters were determined: Activation Energy (Ea), frequency factor (A-1), standard deviation (sd) and linear coefficient (r), that were calculated by thermogravimetry by the Coats-Redern (CR); Madhusudanan (MD); Van Krevelen (VK) and Horowitz-Metzger (HM) methods. The FTIR spectrums from the SS sample presented bands related to water, organic matter and silicon oxides. The biooil was obtained through the conversion at low temperature process, in nitrogen atmosphere, reaching 380oC with holding time of 2h. The pyrolysis process of the SS resulted in 9% of biooil, 57% of coal and 34% of pyrolysis water. It was observed that the biooil obtained is a complex mixture of aliphatic hydrocarbons, aromatics, steroids, nitrogenous and oxygenated compounds, which was identified by the FTIR, RMN 1H, CG-EM techniques. The coal presented low superficial area, not being considered a potentially good catalytic support, by the Langmuir methodology, SLANG 0,748 m2.g-1 as well as the BET, SBET = 0,695m2.g-1. The results confirm that the Conversion at Low Temperature is a promising technique, for both the destination of the SS as well as for the obtainment of biofuels.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Bio Kinetics"

1

Paneth, Piotr, and Agnieszka Dybala-Defratyka. Kinetics and dynamics: From nano- to bio-scale. Dordrecht: Springer, 2010.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

VanHook, W. A. (William Alexander), 1936-, Paneth Piotr, and Rebelo Luís Paulo N, eds. Isotope effects in the chemical, geological, and bio sciences. Dordrecht: Springer, 2010.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Bansal, Narottam P. Crystallization kinetics of BaO-A1O□-□SiOh□. [Washington, DC]: National Aeronautics and Space Administration, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Paneth, Piotr, and Agnieszka Dybala-Defratyka. Kinetics and Dynamics: From Nano- to Bio-Scale. Springer, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Hook, W. Alexander Van, Luís Paulo N. Rebelo, Max Wolfsberg, and Piotr Paneth. Isotope Effects: In the Chemical, Geological, and Bio Sciences. Springer Netherlands, 2014.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Hardeman, M. R. Blood Cells in Nuclear Medicine: Cell Kinetics and Bio-distribution. Ingramcontent, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Najean, Y., and M. R. Hardeman. Blood Cells in Nuclear Medicine, Part I: Cell Kinetics and Bio-Distribution. Springer, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Boon, Mieke. Theoretical and experimental methods in the modelling of bio-oxidation kinetics of sulphide Minerals. Mieke Boon, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Crystallization kinetics of BaO-A1O-SiO. [Washington, DC]: National Aeronautics and Space Administration, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

National Aeronautics and Space Administration (NASA) Staff. Crystallization Kinetics of Bao-Al2o3-Sio2 Glasses. Independently Published, 2019.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Bio Kinetics"

1

Juška, Alfonsas. "(Bio)Chemical Kinetics." In Analysis of biological processes, 83–93. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-7373-7_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Villadsen, John. "Kinetics of Bio-Reactions." In Fundamental Bioengineering, 183–232. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527697441.ch07.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Karoline, J. Philomenal, P. Helen Chandra, S. M. Saroja Theerdus Kalavathy, and A. Mary Imelda Jayaseeli. "Simulation of Fuzzy ACSH on Membranes with Michaelis-Menten Kinetics." In Bio-inspired Computing – Theories and Applications, 142–54. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-3611-8_15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ross, J., S. Pugh, and M. Schell. "Spectral Kinetics and the Efficiency of (Bio) Chemical Reactions." In Springer Series in Synergetics, 34–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73688-9_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Cardenas, Alfredo E. "Determination of Kinetics and Thermodynamics of Biomolecular Processes with Trajectory Fragments." In Springer Series on Bio- and Neurosystems, 281–303. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95843-9_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ghuge, N. S., D. Mandal, M. C. Jadeja, and B. K. Chougule. "Kinetics Analysis of Solid State Reaction for the Synthesis of Lithium Orthosilicate." In Advances in Chemical, Bio and Environmental Engineering, 379–91. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-96554-9_25.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Juška, Alfonsas. "Non-Classical (Bio)Chemical Kinetics not Requiring Multitude of Structural Ligand-Binding Sites." In Analysis of biological processes, 95–109. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-7373-7_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Reuge, N., F. Collet, S. Pretot, S. Moissette, M. Bart, and C. Lanos. "A model of local kinetics of sorption to understand the water transport in bio-based materials." In Lecture Notes in Civil Engineering, 495–500. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0802-8_77.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Bamboriya, Om Prakash, Anil Kumar Varma, Jagjeet Singh Yadav, and Lokendra Singh Thakur. "Physicochemical and Pyrolysis Kinetic Aspects of Biomass Feedstocks: An Overview." In Advances in Chemical, Bio and Environmental Engineering, 181–98. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-96554-9_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Li, Li, Xiuli Yin, Chuangzhi Wu, Longlong Ma, and Zhaoqiu Zhou. "Kinetic Studies on the Pyrolysis and Combustion of Bio-Oil." In Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 2393–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75997-3_483.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Bio Kinetics"

1

Dagaut, Philippe, and Sandro Gai¨l. "Kinetics of Gas Turbine Liquid Fuels Combustion: Jet-A1 and Bio-Kerosene." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27145.

Full text
Abstract:
The oxidation of kerosene and bio-kerosene (kerosene-rapeseed oil methyl esters 80/20 in mole) was studied experimentally in a jet-stirred reactor at 10 atm and constant residence time, over the high temperature range 740-1200 K, and for variable equivalence ratios in the range 0.5–1.5. Concentration profiles of reactants, stable intermediates, and final products were obtained by probe sampling followed by on-line and off-line GC analyses. The oxidation of these fuels in these conditions was modeled using a detailed kinetic reaction mechanism consisting of 2027 reversible reactions and 263 species. The surrogate bio-kerosene model-fuel used consisted of a mixture of n-hexadecane, n-propylcyclohexane, n-propylbenzene, and n-decane. For bio-kerosene, the methyl ester fraction was simply represented by n-hexadecane. The proposed kinetic reaction mechanism used in the modeling yielded a good representation of the kinetics of oxidation of kerosene and bio-kerosene under JSR conditions. The data and the model showed the bio-kerosene (Jet A-1/RME mixture) has a slightly higher reactivity than Jet A-1 whereas not major modification of the products distribution was observed besides the formation of small methyl esters from RME’s oxidation.
APA, Harvard, Vancouver, ISO, and other styles
2

Robinson, Dominic J., Henriëtte S. de Bruijn, and Willem M. Star. "Kinetics of PpIX fluorescence following ALA-PDT." In Biomedical Topical Meeting. Washington, D.C.: OSA, 1999. http://dx.doi.org/10.1364/bio.1999.jma4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Sarvestani, Alireza. "Kinetics of Membrane Spreading on Compliant Bio-Adhesive Substrates." In ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology. ASMEDC, 2010. http://dx.doi.org/10.1115/nemb2010-13321.

Full text
Abstract:
The contact formation between cell membrane and a bio-adhesive substrate is driven by binding between transmembrane mobile receptors (e.g., integrin) and complementary ligand molecules on the substrate (fibronectin, collagen, etc.) This short range specific adhesion is alleviated by a phalanx of interfacial non-specific forces. In addition to cell-substrate interfacial interactions, cell adhesion can be mediated by a wide range of substrate physiochemical properties. In particular, mechanical stiffness of the substrate has been recognized as one of the major regulators for bio-adhesion. Cells in general, exhibit an apparent adhesion preference for stiffer substrates and switch from a round to spread morphology as the substrate stiffness increases. Understanding the mechano-chemical pathways mediating the interplay between the substrate properties and cell behavior could be critical for effective performance of synthetic biomaterials in tissue engineering applications. In this study, we consider the effect of substrate elasticity on the dynamics of membrane spreading and growth of focal adhesion zone. The formation and growth of the focal adhesion points during the early stage of adhesion process is a result of spontaneous spreading of membrane on the substrate. This can be considered as a non-equilibrium kinetic process which is controlled by the diffusibility of receptor molecules. In order to study the effect of substrate elasticity on the kinetics of membrane-substrate association, receptors are assumed as ideal solute particles laterally diffusing within the plane of the membrane until they are stabilized through association with their complementary ligands which are immobilized on the surface of a compliant substrate. Considering different mechanical stiffness for the substrates, the displacement and speed of spreading at the edge of adhesion zone are predicted as a function of time. Results show that decreasing the stiffness of bio-adhesive substrates reduces the rate of membrane spreading, due to a weaker thermodynamic force which drives the membrane-substrate association. This mechanism restrains the growth of focal adhesion zones on compliant substrates and can be considered as a reason for smaller spread area of the cells after stabilization of adhesion.
APA, Harvard, Vancouver, ISO, and other styles
4

Dochain, D., and M. Perrier. "A state observer for (bio)processes with uncertain kinetics." In Proceedings of 2002 American Control Conference. IEEE, 2002. http://dx.doi.org/10.1109/acc.2002.1025225.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Tsai, H. R., B. Z. Bentz, V. Chelvam, V. Gaind, K. J. Webb, and P. S. Low. "In Vivo Optical Imaging of Kinetics in a Small Animal for Folate-Targeted Drug Development." In Bio-Optics: Design and Application. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/boda.2013.jw3b.5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Hangos, Katalin M., Attila Gabor, and Gabor Szederkenyi. "Model reduction in bio-chemical reaction networks with Michaelis-Menten kinetics." In 2013 European Control Conference (ECC). IEEE, 2013. http://dx.doi.org/10.23919/ecc.2013.6669424.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Boutaous, Mhamed, Zakariaa Refaa, Matthieu Zinet, Shihe Xin, and Patrick Bourgin. "Analysis of the Process-Structure-Behavior Interaction in Bio-Sourced Polymers: Role of the Crystallization Kinetics." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39729.

Full text
Abstract:
PLA (Poly Lactic Acid) is a bio-sourced and biodegradable polymer. It represents an alternative for polymers issued from petrochemical synthesis. Unfortunately, the crystallization kinetics of PLA is very slow and limits the possibility to extend its application in several industrials domains. The enhancement of the PLA crystallization kinetic can be obtained by addition of nucleating agents of by ordering the molecular chains during flow, as in processing conditions. During processing of thermoplastic polymer experiences several thermomechanical conditions influencing drastically its final properties and mechanical behavior. During injection molding process, macromolecules are oriented and ordered due to the shear and elongation imposed by the melt flow in the mold during the filling step. As a consequence, supplementary nucleation is created in the polymer, leading to the acceleration of the crystallization kinetics. In this work, we propose to analyze and to quantify the role of the flow, the temperature kinetics and the nucleating agent on injected PLA parts structure and their mechanical behavior. A parametric analysis of the relationship between the polymer, its structure and the processing condition will be presented. The competition (sometimes antagonism) between several parameters, as the shear rate, the temperature kinetics and the nucleating agent will be highlighted.
APA, Harvard, Vancouver, ISO, and other styles
8

Busch, David, Xavier Intes, Shoko Nioka, and Britton Chance. "Comparison of imaged ICG and Gd kinetics with a DOT-MRI instrument." In Biomedical Topical Meeting. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/bio.2006.me11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Ciobanu, Gabriel, and Bogdan Aman. "Computational Power of Chemical Kinetics in Living Cells." In 8th International Conference on Bio-inspired Information and Communications Technologies (formerly BIONETICS). ACM, 2015. http://dx.doi.org/10.4108/icst.bict.2014.258046.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Nikolaev, Denis Sergeevich, Nazika Moeininia, Holger Ott, and Hagen Bueltemeier. "Investigation of Underground Bio-Methanation Using Bio-Reactive Transport Modeling." In SPE Russian Petroleum Technology Conference. SPE, 2021. http://dx.doi.org/10.2118/206617-ms.

Full text
Abstract:
Abstract Underground bio-methanation is a promising technology for large-scale renewable energy storage. Additionally, it enables the recycling of CO2 via the generation of "renewable methane" in porous reservoirs using in-situ microbes as bio-catalysts. Potential candidate reservoirs are depleted gas fields or even abandoned gas storages, providing enormous storage capacity to balance seasonal energy supply and demand fluctuations. This paper discusses the underlying bio-methanation process as part of the ongoing research project "Bio-UGS – Biological conversion of carbon dioxide and hydrogen to methane," funded by the German Federal Ministry of Education and Research (BMBF). First, the hydrodynamic processes are assessed, and a review of the related microbial processes is provided. Then, based on exemplary field-scale simulations, the bio-reactive transport process and its consequences for operation are evaluated. The hydrogen conversion process was investigated by numerical simulations on field scale. For this, a two-phase multi-component bio-reactive transport model was implemented by (Hagemann 2018) in the open-source DuMux (Flemisch et al. 2011) simulation toolkit for porous media flow. The underlying processes include the transport of reactants and products, consumption of specific components, and the related growth and decay of the microbial population, resulting in a bio-reactive transport model. The microbial kinetic parameters of methanogenic reactions are taken from the available literature. The simulation study covers different scenarios on conceptional field-scale models, studying the impact of well placement, injection rates, and gas compositions. Due to a significant sensitivity of the simulation results to the bio-conversion kinetics, the field-specific conversion rates must be obtained. Thus, the Bio-UGS project is accompanied by laboratory experiments out of the frame of this paper. Other parameters are rather a matter of design; in the present case of depleted gas fields, those parameters are coupled and can be chosen to convert fully hydrogen and carbon dioxide to methane. Especially the well spacing can be considered the main design parameter in the likely case of a given injection rate and gas composition. This study extends the application of the previously developed code from a homogeneous-2D to the heterogeneous-3D case. The simulations mimic the co-injection of carbon dioxide and hydrogen from a 40 MW electrolysis.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Bio Kinetics"

1

Lahav, Ori, Albert Heber, and David Broday. Elimination of emissions of ammonia and hydrogen sulfide from confined animal and feeding operations (CAFO) using an adsorption/liquid-redox process with biological regeneration. United States Department of Agriculture, March 2008. http://dx.doi.org/10.32747/2008.7695589.bard.

Full text
Abstract:
The project was originally aimed at investigating and developing new efficient methods for cost effective removal of ammonia (NH₃) and hydrogen sulfide (H₂S) from Concentrated Animal Feeding Operations (CAFO), in particular broiler and laying houses (NH₃) and hog houses (H₂S). In both cases, the principal idea was to design and operate a dedicated air collection system that would be used for the treatment of the gases, and that would work independently from the general ventilation system. The advantages envisaged: (1) if collected at a point close to the source of generation, pollutants would arrive at the treatment system at higher concentrations; (2) the air in the vicinity of the animals would be cleaner, a fact that would promote animal growth rates; and (3) collection efficiency would be improved and adverse environmental impact reduced. For practical reasons, the project was divided in two: one effort concentrated on NH₃₍g₎ removal from chicken houses and another on H₂S₍g₎ removal from hog houses. NH₃₍g₎ removal: a novel approach was developed to reduce ammonia emissions from CAFOs in general, and poultry houses in particular. Air sucked by the dedicated air capturing system from close to the litter was shown to have NH₃₍g₎ concentrations an order of magnitude higher than at the vents of the ventilation system. The NH₃₍g₎ rich waste air was conveyed to an acidic (0<pH<~5) bubble column reactor where NH₃ was converted to NH₄⁺. The reactor operated in batch mode, starting at pH 0 and was switched to a new acidic absorption solution just before NH₃₍g₎ breakthrough occurred, at pH ~5. Experiments with a wide range of NH₃₍g₎ concentrations showed that the absorption efficiency was practically 100% throughout the process as long as the face velocity was below 4 cm/s. The potential advantages of the method include high absorption efficiency, lower NH₃₍g₎ concentrations in the vicinity of the birds, generation of a valuable product and the separation between the ventilation and ammonia treatment systems. A small scale pilot operation conducted for 5 weeks in a broiler house showed the approach to be technically feasible. H₂S₍g₎ removal: The main goal of this part was to develop a specific treatment process for minimizing H₂S₍g₎ emissions from hog houses. The proposed process consists of three units: In the 1ˢᵗ H₂S₍g₎ is absorbed into an acidic (pH<2) ferric iron solution and oxidized by Fe(III) to S⁰ in a bubble column reactor. In parallel, Fe(III) is reduced to Fe(II). In the 2ⁿᵈ unit Fe(II) is bio-oxidized back to Fe(III) by Acidithiobacillus ferrooxidans (AF).In the 3ʳᵈ unit S⁰ is separated from solution in a gravity settler. The work focused on three sub-processes: the kinetics of H₂S absorption into a ferric solution at low pH, the kinetics of Fe²⁺ oxidation by AF and the factors that affect ferric iron precipitation (a main obstacle for a continuous operation of the process) under the operational conditions. H₂S removal efficiency was found higher at a higher Fe(III) concentration and also higher for higher H₂S₍g₎ concentrations and lower flow rates of the treated air. The rate limiting step of the H₂S reactive absorption was found to be the chemical reaction rather than the transition from gas to liquid phase. H₂S₍g₎ removal efficiency of >95% was recorded with Fe(III) concentration of 9 g/L using typical AFO air compositions. The 2ⁿᵈ part of the work focused on kinetics of Fe(II) oxidation by AF. A new lab technique was developed for determining the kinetic equation and kinetic parameters (KS, Kₚ and mₘₐₓ) for the bacteria. The 3ʳᵈ part focused on iron oxide precipitation under the operational conditions. It was found that at lower pH (1.5) jarosite accumulation is slower and that the performance of the AF at this pH was sufficient for successive operation of the proposed process at the H₂S fluxes predicted from AFOs. A laboratory-scale test was carried out at Purdue University on the use of the integrated system for simultaneous hydrogen sulfide removal from a H₂S bubble column filled with ferric sulfate solution and biological regeneration of ferric ions in a packed column immobilized with enriched AFbacteria. Results demonstrated the technical feasibility of the integrated system for H₂S removal and simultaneous biological regeneration of Fe(III) for potential continuous treatment of H₂S released from CAFO. NH₃ and H₂S gradient measurements at egg layer and swine barns were conducted in winter and summer at Purdue. Results showed high potential to concentrate NH₃ and H₂S in hog buildings, and NH₃ in layer houses. H₂S emissions from layer houses were too low for a significant gradient. An NH₃ capturing system was designed and tested in a 100-chicken broiler room. Five bell-type collecting devices were installed over the litter to collect NH₃ emissions. While the air extraction system moved only 10% of the total room ventilation airflow rate, the fraction of total ammonia removed was 18%, because of the higher concentration air taken from near the litter. The system demonstrated the potential to reduce emissions from broiler facilities and to concentrate the NH₃ effluent for use in an emission control system. In summary, the project laid a solid foundation for the implementation of both processes, and also resulted in a significant scientific contribution related to AF kinetic studies and ferrous analytical measurements.
APA, Harvard, Vancouver, ISO, and other styles
2

Heidner, III, Holloway R. F., Koffend J. S., and J. B. BiF/NF2 Kinetics Studies: Mechanism and Conversion Efficiency. Fort Belvoir, VA: Defense Technical Information Center, August 1990. http://dx.doi.org/10.21236/ada230222.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Rhee, In-Sik. Development of a New Bio-Kinetic Model for Assessing the Environmental Property of Military Hydraulic Fluids. Fort Belvoir, VA: Defense Technical Information Center, September 2006. http://dx.doi.org/10.21236/ada460703.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Hoffsommer, J. C. Kinetics and Mechanism for the Basic Hydrolysis of BIS (2,2- Dinitropropyl) Acetal (BDNPA) and BIS (2,2-Dinitropropyl) Formal (BDNPF). Fort Belvoir, VA: Defense Technical Information Center, March 1985. http://dx.doi.org/10.21236/ada153201.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Safarik, Douglas, Michael Aloi, and Arthur Nobile, Jr. Semi-Empirical Material Model for Hydrogen Uptake Kinetics by 1,4-bis(phenylethynyl)benzene (DEB)-based Getters. Office of Scientific and Technical Information (OSTI), October 2020. http://dx.doi.org/10.2172/1673346.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Eldeeb, Mazen A. Development of Reduced Chemical Kinetic Models for the Numerical Simulation of Combustion and Emissions Behavior of Representative Conventional and Bio-derived Fuels. Mineta Transportation Institute, June 2020. http://dx.doi.org/10.31979/mti.2020.1910.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Bio Kinetics' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography