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Journal articles on the topic 'Isosteric method'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Zheng, Qing Rong, Shuai Gao, and Chen Jie. "Determination of the Isosteric Heat of Adsorption of Hydrogen on the Multi-Walled Carbon Nanotubes." Advanced Materials Research 512-515 (May 2012): 1484–91. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1484.

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The isosteric heat of adsorption was used to study the interaction between hydrogen molecules and the Multi-Walled Carbon Nanotubes (MWCNTs). Characterizations of the MWCNTs sample were carried out based on the N2 adsorption isotherm at 77 K and the images from TEM and HRTEM. Step by step method was used to volumetrically measure hydrogen adsorption isotherms at equilibrium temperature-pressures from 123-310 K and 0-12.3 MPa. Isosteric heats of adsorption at seven excess adsorption amounts and that at zero surface loading were respectively determined by the slopes of the adsorption isosteres a

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2

Giraldo, Liliana, Paola Rodriguez-Estupiñán, and Juan Carlos Moreno-Piraján. "Isosteric Heat: Comparative Study between Clausius–Clapeyron, CSK and Adsorption Calorimetry Methods." Processes 7, no. 4 (2019): 203. http://dx.doi.org/10.3390/pr7040203.

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This work presents the calorimetric study of five adsorbents with different chemical and textural characteristics: MOF-199, MCM-41, SBA-15, activated carbon prepared from corn cob (GACKP) and graphite. These solids were used to establish the differences between isosteric heats evaluated by three different methods: Clausius–Clapeyron (C-C), Chakraborty, Saha and Koyama (CSK) and Adsorption Calorimetry (A-Cal). The textural characterization results show solids that have values of specific surface area between 2271 m2·g−1 for the MOF-199 and 5.2 m2·g−1 for the graphite. According to the results o

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3

Yonova, Albena. "Experimental studies on equilibrium adsorption isosteres and determination of the thermodynamic quantities of polar media on alumina Al2O3." Acta Scientifica Naturalis 4, no. 1 (2017): 34–45. http://dx.doi.org/10.1515/asn-2017-0006.

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Abstract The present work is a revieif of theoretical and experimental study on the adsorption performance of the adsorbent Alumina (Al2O3) used in the adsorption system. An experimental investigation on the equilibrium adsorption isosteres at low pressure (< 1 atm) of working pairs Al2O3/H2O and Al2O3/C2H6O2 is carried out. The isovolume measurement method is adopted in the test setup to directly measure the saturated vapor pressures of working pairs at vapor-liquid equilibrium (dG=0 and dμi=0). Quantity adsorbed is determined from pressure, volume and temperature using gas law. The isoste

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4

Štencl, Jiří. "Effect of temperature and water activity on heat transfer in parsley leaves in the range of temperatures 10–30 °C." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 55, no. 5 (2007): 181–86. http://dx.doi.org/10.11118/actaun200755050181.

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The equilibrium moisture contents of parsley leaves were measured by the gravimetric dynamic method with continuous recording of changes in sample weight. Consequently water activity values were determined. Henderson equation was found to be a good model both for moisture adsorption and desorption. Isosteric heat of sorption was defined and determined in the temperature range of 10–30 °C. Clausius-Clapeyron equation was used to calculate the isosteric heat of sorption since no dependence on temperature in the analysed range was observed. The isosteric heats of sorption (qnst) were indicated gr

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5

Li, Dong. "Study on the Calculation method of the Coal and Gas Outburst Threshold." International Journal of Innovative Research in Advanced Engineering 10, no. 02 (2023): 10–17. http://dx.doi.org/10.26562/ijirae.2023.v1002.01.

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The four undetermined parameters of the temperature-pressure-adsorption equation (TPAE) were obtained by regression of the series isothermal adsorption data of the measured middle-rank deformed coal and normal coal. The unit isosteric adsorption enthalpy (UIAE) was obtained. According to the negative value of the UIAE, adsorption is an exothermic process, desorption is an endothermic process. The coal and gas outburst threshold (OT) is defined as the product of the firmness coefficient and the unit isosteric desorption enthalpy (UIDE) to show the combined effect of adsorption thermodynamics an

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6

Kloutse, A. F., R. Zacharia, D. Cossement, et al. "Isosteric heat of hydrogen adsorption on MOFs: comparison between adsorption calorimetry, sorption isosteric method, and analytical models." Applied Physics A 121, no. 4 (2015): 1417–24. http://dx.doi.org/10.1007/s00339-015-9484-6.

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7

Cavalcante, Maisa D., Geovana R. Plácido, Daniel E. C. de Oliveira, Bheatriz S. M. de Freitas, Caroline Cagnin, and Déborah de S. Oliveira. "Isotherms and isostatic heat of foam-mat dried yellow mombin pulp." Revista Brasileira de Engenharia Agrícola e Ambiental 22, no. 6 (2018): 436–41. http://dx.doi.org/10.1590/1807-1929/agriambi.v22n6p436-441.

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ABSTRACT Yellow mombin has high nutritional value but is very perishable. Foam mat drying is a method that has been widely used to preserve liquid and semi-solid powdered foods. In this context, the aim of this study was to determine desorption isotherms and isosteric heat of yellow mombin (Spondias mombin L.) foam for different conditions of temperature and water activity. Powdered yellow mombin pulp was obtained by drying in forced-air oven regulated to 60 ° C. The indirect static method was used to determine the isotherms and isosteric heat, whereas water activity (aw) was determined using

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8

Liu, Xiu Ying, Wei Guo Sun, Zhi Qin Fan, and Li Ying Zhang. "Adsorption of Methane on Several Zeolites by Monte Carlo Method." Advanced Materials Research 512-515 (May 2012): 1353–57. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1353.

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Grand Canonical Monte Carlo (GCMC) method is employed to simulate the adsorption of methane in several nanoporous zeolites. Adsorption isotherms over the temperature 177-398K and the pressure 0-12MPa are simulated. And their adsorption capacities of methane in these zeolites at different temperatures and pressures are also compared. The results show that: (1) the methane uptake is in the order of LTA>MOR>MFI at the same condition. The isosteric heat can support this conclusion: the value of isosteric heat in LTA is the largest, intermediate in MOR and the least in MFI. (2) The effects of

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9

Tautz, Markus, César Saldías, Antonio Diego Lozano-Gorrín, and David Díaz Díaz. "Use of a bis-1,2,3-triazole gelator for the preparation of supramolecular metallogels and stabilization of gold nanoparticles." New Journal of Chemistry 43, no. 35 (2019): 13850–56. http://dx.doi.org/10.1039/c9nj03427g.

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10

Poyet, Stéphane, Gaëtan Touzé, Jean-Luc Adia, Laurent Charpin, and Sylvie Michel-Ponnelle. "A simple method to measure the isosteric energy of adsorption." Cement and Concrete Research 147 (September 2021): 106520. http://dx.doi.org/10.1016/j.cemconres.2021.106520.

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11

Cao, J., and D. P. Kamdem. "Moisture adsorption thermodynamics of wood from fractal-geometry approach." Holzforschung 58, no. 3 (2004): 274–79. http://dx.doi.org/10.1515/hf.2004.042.

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Abstract The fractal-geometry approach was used to calculate the thermodynamic properties of moisture sorption by wood from the adsorption isotherms in this study. The results were compared with those from an isosteric approach and a calorimetric approach. The adsorption isotherms of Southern yellow pine (Pinus spp.) were measured at 4, 15, 30, and 40°C to provide source data for the calculation of both fractal-geometry and isosteric approaches. The results show that the fractal dimensions of the internal surfaces of wood vary between 2.4 and 2.5. The curves of the differential heat of adsorpt

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12

Liu, Xiuying, Jie He, and Rui Li. "High-Pressure Hydrogen Adsorption in the Zeolites: A Grand Canonical Monte Carlo Study." ISRN Renewable Energy 2012 (July 8, 2012): 1–4. http://dx.doi.org/10.5402/2012/491396.

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The adsorption of hydrogen molecules on different zeolites at near room temperature and extremely high pressures has been simulated employing Grand Canonical Monte Carlo (GCMC) method. Some important physical amounts under different temperatures and pressures, such as adsorption isotherms, adsorption amounts, and isosteric heats were studied. We predict the storage capacity of hydrogen in ZON and CHA zeolites at different conditions. The results show that the hydrogen storage capacity of CHA is superior to that of ZON. The different hydrogen adsorption behavior between them is explained by the

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13

Li, Dong, Qinghua Ma, Xuemei Zhang, Yaling Wei, and Jingyuan Hao. "STUDY ON THE CALCULATION AND APPLICATION OF THE UNIT ISOSTERIC ADSORPTION ENTHALPY." International Journal of Innovative Research in Advanced Engineering 9, no. 11 (2022): 453–58. http://dx.doi.org/10.26562/ijirae.2022.v0911.03.

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A series of isothermal adsorption experimental data of lean coal and fat coal has been converted into a temperature-pressure-adsorption equation. The slop of the lnP vs 1/T straight line of Clausius-Clapeyron equation proves that physical adsorption is an exothermic process. The Unit Isosteric Adsorption Enthalpy (UIAE, KJ•mol-1•cm-3•g) is defined as a unit adsorbed amount enthalpy at a fixed adsorbed amount andthe calculation method is presented. The UIAE calculation results prove the surface of the adsorption medium is not uniform, and the interaction between the adsorption molecules occurs.

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14

Ouaabou, Rachida, Said Ennahli, Chira Di Lorenzo, et al. "Hygroscopic Properties of Sweet Cherry Powder: Thermodynamic Properties and Microstructural Changes." Journal of Food Quality 2021 (December 1, 2021): 1–11. http://dx.doi.org/10.1155/2021/3925572.

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Understanding sorption isotherms is crucial in food science for optimizing the drying processes, enhancing the shelf-life of food, and maintaining food quality during storage. This study investigated the isotherms of sweet cherry powder (SCP) using the static gravimetric method. The experimental water sorption curves of lyophilized sweet cherry powder were determined at 30°C, 40°C, and 50°C. The curves were then fitted to six isotherm models: Modified GAB, Halsey, Smith, Oswin, Caurie, and Kühn models. To define the energy associated with the sorption process, the isosteric sorption heat, diff

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15

Sousa, Kelly A. de, Osvaldo Resende, and Bruno de S. Carvalho. "Determination of desorption isotherms, latent heat and isosteric heat of pequi diaspore." Revista Brasileira de Engenharia Agrícola e Ambiental 20, no. 5 (2016): 493–98. http://dx.doi.org/10.1590/1807-1929/agriambi.v20n5p493-498.

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ABSTRACT The objective was to determine water sorption isotherms of diaspores of pequi fruits in order to obtain information on the amount of water that this product desorbs at the temperatures of 10, 20, 30 and 40 °C and water activities from 0.20 to 0.89, adjusting different mathematical models to experimental data, and to determine its latent heat and isosteric heat. The equilibrium moisture content was obtained through the indirect static method, using the device Hygropalm Model Aw 1. The Modified Henderson model was the one that best fitted the data and was selected to predict the equilib

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16

Oliveira, Daniel E. C. de, Osvaldo Resende, Lílian M. Costa, Weder N. Ferreira Júnior, and Silva Igor O. F. "Hygroscopicity of baru (Dipteryx alata Vogel) fruit." Revista Brasileira de Engenharia Agrícola e Ambiental 21, no. 4 (2017): 279–84. http://dx.doi.org/10.1590/1807-1929/agriambi.v21n4p279-284.

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ABSTRACT With the knowledge on the hygroscopic equilibrium of the baru (Dipteryx alata Vogel) fruit, the product can be adequately handled to maintain the moisture content at the levels recommended for safe storage. Thus, this paper aimed to determine the water desorption isotherms of baru fruits at temperatures of 20, 25, 30 and 35 °C, and water activity between 0.14 and 0.80, and obtain the values of isosteric heat of desorption as a function of the equilibrium moisture content of the product. The equilibrium moisture content was obtained using the static-gravimetric method. Modified Halsey

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17

Oliveira, Daniel E. C. de, Osvaldo Resende, Lílian M. Costa, Glicélia P. Silva, and Juliana de F. Sales. "Hygroscopicity of ‘sucupira-branca’ (Pterodon emarginatus Vogel) fruits." Revista Brasileira de Engenharia Agrícola e Ambiental 21, no. 4 (2017): 285–89. http://dx.doi.org/10.1590/1807-1929/agriambi.v21n4p285-289.

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ABSTRACT ‘Sucupira-branca’ (Pterodon emarginatus Vogel) is a tree from ‘Cerrado’ and stands out mainly for its pharmacological properties; however, there are no technological information about its post-harvest operations. Thus, the aim of this study was to determine the sorption isotherms of ‘sucupira-branca’ fruits for different air conditions and obtain the values of desorption isosteric heat, depending on the equilibrium moisture content of the product. The equilibrium moisture content of ‘sucupira-branca’ fruits was determined by dynamic method for temperatures of 25, 30, 35 and 40 °C and

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18

Barbosa, Karine F., Juliana de F. Sales, Osvaldo Resende, Daniel E. C. de Oliveira, Jacson Zuchi, and Kelly A. de Sousa. "Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes." Revista Brasileira de Engenharia Agrícola e Ambiental 20, no. 5 (2016): 481–86. http://dx.doi.org/10.1590/1807-1929/agriambi.v20n5p481-486.

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ABSTRACT The objective of this study was to determine the desorption isotherms of 'cajuzinho-do-cerrado' achenes (Anacardium humile St. Hil.) in various conditions of temperature and water activity, as well as to select the one that best represents the phenomenon and to determine the isosteric heat of desorption. The fruits were collected at the Emas National Park, in the municipality of Mineiros-GO, Brazil, pulped and then subjected to drying in silica gel at temperature of 25 ± 2 °C until the moisture contents of 17.6, 13.6, 11.1, 8.7 and 5.3 (d.b.%). After drying, the desorption isotherms w

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19

Ferreira Junior, Weder N., Osvaldo Resende, Kelly A. de Sousa, Melícia I. A. Gavazza, Juliana de F. Sales, and Daniel E. C. de Oliveira. "Desorption isotherms and isosteric heat of araticum (Annona crassiflora Mart.) seeds." Revista Brasileira de Engenharia Agrícola e Ambiental 24, no. 9 (2020): 630–36. http://dx.doi.org/10.1590/1807-1929/agriambi.v24n9p630-636.

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ABSTRACT The objective of this study was to determine the desorption isotherms and isosteric heat of Annona crassiflora Mart. seeds, using Akaike information criterion (AIC) and Schwarz’s Bayesian information criterion (BIC) to assist in the choice of the nonlinear regression model. The desorption isotherms were determined by indirect static method and water activity was obtained using the instrument HygroPalm; the product was put in the device in B.O.D. chamber set at 10, 20, 30 and 40 °C. Several nonlinear regression models were fitted to the experimental data by the Gauss-Newton method. The

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20

Ren, Zhong Yang, Yan Yan Wu, Zhen Hua Duan, Lai Hao Li, and Xian Qing Yang. "Experimental Study and Modelling of Moisture Sorption Isotherms of Salted Largehead Hairtail (Trichiurus lepturus) at 25 and 35°C." Advanced Materials Research 1033-1034 (October 2014): 681–89. http://dx.doi.org/10.4028/www.scientific.net/amr.1033-1034.681.

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The moisture sorption characteristics of salted largehead hairtail (Trichiurus lepturus) were investigated within the limits of water activity (0.11-0.98) at 25 and 35°C using a self-made instrument for the measurement of the equilibrium moisture content according to the static gravimetric method. The shape of the sorption isotherms was sigmoidal. The moisture sorption isotherms exhibited significant hysteresis. The hysteresis of salted fish may be due to the salt permeating into the body of the fish as a result of desorption and adsorption processes. Seventeen mathematical models were fit to

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21

Mohamad Efendi, Yusuf Hendrawan, La Choviya Hawa, Bambang Dwi Argo, Sumardi Hadi Sumarlan, and Bambang Susilo. "Moisture adsorption isotherms properties of dried overripe barlin fruit (Musa acuminata AA.) powder." World Journal of Advanced Research and Reviews 18, no. 2 (2023): 1386–95. http://dx.doi.org/10.30574/wjarr.2023.18.2.0977.

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Moisture sorption of dried overripe barlin banana powder using the static gravimetric method. The materials were conditioned at 5, 10, and 25 oC with a water activity range of 0.16 to 0.86. Five mathematical models to describe the suitability of the phenomenon of adsorption experimental data using non-linear regression. The thermodynamic properties such as isosteric heat and Gibbs free energy are evaluated in this paper. The experimental results indicated that the equilibrium moisture content of dried overripe barlin banana powder increased with increasing water activity and decreasing tempera

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22

Mohamad, Efendi, Hendrawan Yusuf, Choviya Hawa La, Dwi Argo Bambang, Hadi Sumarlan Sumardi, and Susilo Bambang. "Moisture adsorption isotherms properties of dried overripe barlin fruit (Musa acuminata AA.) powder." World Journal of Advanced Research and Reviews 18, no. 2 (2023): 1386–95. https://doi.org/10.5281/zenodo.8414524.

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Moisture sorption of dried overripe barlin banana powder using the static gravimetric method. The materials were conditioned at 5, 10, and 25 <sup>o</sup>C with a water activity range of 0.16 to 0.86. Five mathematical models to describe the suitability of the phenomenon of adsorption experimental data using non-linear regression. The thermodynamic properties such as isosteric heat and Gibbs free energy are evaluated in this paper. The experimental results indicated that the equilibrium moisture content of dried overripe barlin banana powder increased with increasing water activity and de

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23

Suntaro, Kiattisak, Supawan Tirawanichakul, and Yutthana Tirawanichakul. "Determination of Isosteric Heat and Entropy of Sorption of Air Dried Sheet Rubber Using Artificial Neural Network Approach." Applied Mechanics and Materials 541-542 (March 2014): 374–79. http://dx.doi.org/10.4028/www.scientific.net/amm.541-542.374.

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Equilibrium moisture contents (EMC) of air dried sheet (ADS) rubber were determined by commonly gravimetric-static method with saturated salt solution among surrounding temperatures of 40-70°C correlated to water activity (aw) ranges between 0.10 and 0.9. The experimental results was analyzed by 5 commonly EMC model. The results showed that equilibrium moisture content of ADS rubber decreased with increase of surrounding temperature at constant water activity and the simulated data using Chung-Pfost model has a good relation to experimental data with R2, RMSE and χ2 equal 0.9565, 0.0235 and 0.

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24

Zálešák, František, Jan Slouka, and Jakub Stýskala. "General Synthesis of 1-Aryl-6-azaisocytosines and Their Utilization for the Preparation of Related Condensed 1,2,4-Triazines." Molecules 24, no. 19 (2019): 3558. http://dx.doi.org/10.3390/molecules24193558.

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A simple general synthesis of 1-aryl-6-azaisocytosine-5-carbonitriles 4 is described. This method is based on coupling diazonium salts with cyanoacetylcyanamide 2 and then cyclization of the formed 2-arylhydrazono-2-cyanoacetylcyanamides 3. The 6-azaisocytosines 4 were studied with respect to tautomeric equilibrium and the transformation of functional groups, and used in the synthesis of the condensed heterocyclic compounds: Purine isosteric imidazo[2,1-c]-[1,2,4]triazine 8 and the 1,2,4-triazino[2,3-a]quinazolines 9–12.

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25

Costa, Lílian Moreira, Osvaldo Resende, Weder Nunes Ferreira Junior, Daniel Emanuel Cabral de Oliveira, and Igor Olacir Fernandes Silva. "Isotermas e calor isostérico de dessorção das sementes de tungue." Revista Principia - Divulgação Científica e Tecnológica do IFPB 1, no. 54 (2021): 163. http://dx.doi.org/10.18265/1517-0306a2021v1n54p163-171.

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<p><span class="fontstyle0">The tung is a species that has potential for biodiesel production, so for safe storage there is a need to get to know its hygroscopicity. The objective of this work was to determine the desorption isotherms based on the recommendation of a mathematical model, to define the safe moisture content for storage, and to obtain the isosteric heat for the tung seeds. In order to obtain the hygroscopic equilibrium water content, the static method was used, with 20g of seeds surrounded by a permeable tissue, and placed inside the desiccators containing salt soluti

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26

Echeverría, Jesús C., Ignacio Calleja, Paula Moriones, and Julián J. Garrido. "Fiber optic sensors based on hybrid phenyl-silica xerogel films to detect n-hexane: determination of the isosteric enthalpy of adsorption." Beilstein Journal of Nanotechnology 8 (February 21, 2017): 475–84. http://dx.doi.org/10.3762/bjnano.8.51.

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We investigated the response of three fiber optic sensing elements prepared at pH 10 from phenyltriethoxysilane (PhTEOS) and tetraethylsilane (TEOS) mixtures with 30, 40, and 50% PhTEOS in the silicon precursor mixture. The sensing elements are referred to as Ph30, Ph40 and Ph50, respectively. The films were synthesized by the sol–gel method and affixed to the end of optical fibers by the dip-coating technique. Fourier transform infrared spectroscopy, N2 adsorption–desorption at 77 K and X-ray diffraction analysis were used to characterize the xerogels. At a given pressure of n-hexane, the res

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27

Siqueira, Valdiney Cambuy, Fernanda Pimentel Da Silva, Wellytton Darci Quequeto, Rodrigo Aparecido Jordan, Rafael Araujo Leite, and Geraldo Acácio Mabasso. "Desorption isotherms and isosteric heat of niger grains (Guizotia abyssinica (L. f.) Cass.)." REVISTA AGRO@MBIENTE ON-LINE 12, no. 2 (2018): 124. http://dx.doi.org/10.18227/1982-8470ragro.v12i2.4908.

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Niger seed oil has excellent quality and quantity (30-50%) and is rich in polyunsaturated fatty acids, mainly linoleic acid (about 70%). Thus, control of environmental temperature and relative humidity, and of seed moisture content is essential to maintain seed oil quality during storage. Thus, the objective of this study was to determine the desorption isotherms of niger seeds under different temperature and water activity conditions, to test the experimental data with different mathematical models, and discover which best represents the phenomenon, as well as calculate the isosteric heat val

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28

Agbor, Agbor Evelyn, Charles Chukwuma Ariahu, Peter A. Adie, and E. C. Ariahu. "Moisture Transfer Characteristics and Microbiological Stability of Fermented Pre-gelatinized Plantain and Soybean Based Complementary Food Flours." Asian Food Science Journal 23, no. 4 (2024): 44–53. http://dx.doi.org/10.9734/afsj/2024/v23i4710.

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The effect of gelatinization and fermentation on the moisture sorption characteristics and microbial stability of complementary foods from unripe plantain fruits and soybean seeds was evaluated. The plantain was heated to obtain 10%, 18%, 23%, 33%, 74% and 100% starch gelatinization. The samples were fermented, dried and ground to flour. Plantain and soybean flour were mixed by material balance to produce 16% protein complementary foods. Moisture sorption isotherms wereinvestigated at 10, 20, 30, and 40 ° C using the gravimetric method. The BET equation was fitted to the experimental sorption

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29

Ferreira Junior, Weder N., Osvaldo Resende, Daniel E. C. de Oliveira, and Lílian M. Costa. "Isotherms and Isosteric Heat Desorption of Hymenaea stigonocarpa Mart. Seeds." Journal of Agricultural Science 10, no. 10 (2018): 504. http://dx.doi.org/10.5539/jas.v10n10p504.

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The Brazilian Cerrado is one of the most important ecosystems and due to the extractivism it is necessary to recover the degraded areas. The tree of Hymenaea stigonocarpa Mart. is used in this reforestation system, so the study of post-harvest management of the seed is necessary for the propagation. The objective of this work was to determine the isotherms and the isosteric desorption heat of Hymenaea stigonocarpa Mart. Seeds, and to test the methodology of the Akaike&rsquo;s information criterion (AIC) and Schwarz&rsquo;s bayesian information criterion (BIC) for the choice of the best

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30

Shim, Wang-Geun, Min-Joo Lee, Hyun-Chul Kang, et al. "Surface Energy Heterogeneity and Heterogeneous Adsorption of Benzene on Double-Walled Carbon Nanotubes." Journal of Nanoscience and Nanotechnology 7, no. 11 (2007): 3896–901. http://dx.doi.org/10.1166/jnn.2007.057.

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We examined the adsorption properties of double walled carbon nanotubes (DWCNTs) synthesized by using a catalytic chemical decomposition vapor method. To analyze the structural and energetical surface characteristics of the DWCNTs, nitrogen and benzene adsorption isotherms were measured. The Toth isotherm equation was used to correlate the adsorption data and evaluate the thermodynamic properties such as Henry's constant and the adsorption second virial coefficient. The existence of heterogeneous surface in DWCNTs was confirmed by the analysis of pore size distribution, the isosteric heat of a

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Akmel, Djedjro C., Kouassi E. Kakou, Kisselmina Y. Kone, Nogbou E. Assidjo, and Patrice Kouame. "Desorption Isotherms and Isosteric Heats of Fermented Cocoa Beans (Theobroma cocoa)." Journal of Food Research 4, no. 3 (2015): 138. http://dx.doi.org/10.5539/jfr.v4n3p138.

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<p>Water desorption isotherms of fermented cocoa beans from Ivory Coast were determined using the gravimetric static method of saturated salts solutions at 30 °C, 40 °C and 60 °C, and isosteric heats of desorption were calculated from Clausius-Clapeyron equation. The experimental data were fitted to several isotherm equations. The best fittings were obtained for the BET equation for aw&lt;0.50 (with an average mean relative deviation (MRD) value of 1.56%) and for the Harkins-Jura equation for aw?0.50 (with an average value MRD equation of 4.17%). The isotherms obtained at 30 °C and 4

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32

Verdier Abouo, N., K. Ernest Kakou, E. Edwige Akoa, and N. Emmanuel Assidjo. "MODELING OF THE WATER ADSORPTION ISOTHERM OF MANGO SLICES (MANGIFERA INDICA L.) DRIED UNDER HOT AIR." International Journal of Advanced Research 11, no. 05 (2023): 603–12. http://dx.doi.org/10.21474/ijar01/16913.

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The general objective of this work is to contribute to the reduction of post-harvest losses of mangoes by the transformation into stable dried products.This research aims to determine the best storage conditions for dried mangoes.Thus, the water adsorption isotherms of mango slices dried under hot air were experimentally determined by the static thermogravimetric method at 25Ã‚Â°C.Eight mathematical models from the literature were used (GAB, BET, Hasley, Henderson, Harking and Dura, Oswin, Chung and Pfost, Smith) to describe the hygroscopic behavior of dried mango slices.Regression analysis wa

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Fabien, Akana Tsopmo, ArmelKom Yvan, Claude Damfeu Jean, et al. "Desorption Isotherms of Dioscorea Schimperiana (Hairy Yam): An Experimental and Modeling Approach." International Journal of Innovative Science and Research Technology 7, no. 8 (2022): 616–24. https://doi.org/10.5281/zenodo.7036559.

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Several scientific types of research have already been carried out on yam tuber varieties of the Dioscorea family such as Dioscorea Retundata, and Dioscorea Alata. We can mention among others: the determination of sorption isotherms, their isosteric heat, and the drying kinetics. Dioscorea Schimperiana is also a tuber belonging to the same family and is currently a very popular foodstuff in the West Cameroon region. This plant, considered a nutritional element, also has several therapeutic virtues. However, the lack of knowledge of some of its thermophysical properties, especially the water co

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Larbi, Ahmed Amine, Akil Loumani, Ahmed Mediani та ін. "Inﬂuence of temperature and Thermodynamic Analysis on Adsorption/Desorption Isothermss for green menth." Algerian Journal of Renewable Energy and Sustainable Development 5, № 1 (2023): 85–93. http://dx.doi.org/10.46657/ajresd.2023.5.1.11.

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The objective of this study is to experimentally determine the sorption isotherms and thermodynamic properties of green mint after undergoing thermal and biochemical treatment. The method employed is the gravimetric method using saturated saline solutions at various temperatures. In order to model and predict the hygroscopic behavior during drying and storage, we have utilized developed mathematical models (such as the Langmuir, GAB, modified BET, Peleg models, etc.). The adjustment and optimization of these models will be conducted using statistical techniques to analyze the obtained data. Th

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Ajala, A. S., P. O. Ngoddy, and J. O. Olajide. "Sorption isotherms and their fitted equations for dried chips of cassava roots (Manihot Esculenta Crantz; Tme-7 variety) and the resulting isosteric heats of sorption." Food Research 4, no. 3 (2020): 703–11. http://dx.doi.org/10.26656/fr.2017.4(3).340.

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Cassava roots are susceptible to deterioration with 24 hrs of harvest; it needs processing into a more stable material such as dried cassava chips to extend its shelf life for long storage. However, improper knowledge of the effect of atmospheric relative humidity on these dried chips during storage makes it mouldy and unacceptable. This work aimed at studying the effect of sorption isotherms on the dried cassava chips. In this study, adsorption and desorption isotherm were carried out using static gravimetric method and data for equilibrium moisture content (EMC) were generated at five (5) te

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Pedro, Maria Angélica Marques, Javier Telis-Romero, and Vânia Regina Nicoletti Telis. "Effect of drying method on the adsorption isotherms and isosteric heat of passion fruit pulp powder." Ciência e Tecnologia de Alimentos 30, no. 4 (2010): 993–1000. http://dx.doi.org/10.1590/s0101-20612010000400024.

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Du, Zhenyu, Xianhua Nie, Shuai Deng, et al. "Comparative analysis of calculation method of adsorption isosteric heat: Case study of CO2 capture using MOFs." Microporous and Mesoporous Materials 298 (May 2020): 110053. http://dx.doi.org/10.1016/j.micromeso.2020.110053.

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Corrêa, P. C., A. L. D. Goneli, C. Jaren, D. M. Ribeiro, and O. Resende. "Sorption Isotherms and Isosteric Heat of Peanut Pods, Kernels and Hulls." Food Science and Technology International 13, no. 3 (2007): 231–38. http://dx.doi.org/10.1177/1082013207079601.

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This study was carried out to evaluate the sorption isotherms of peanut pods, kernels and hulls for several temperature and humidity conditions and to fit different mathematical models to the experimental data, selecting the one best fitting the phenomenon. The dynamic method was applied to obtain the hygroscopic equilibrium moisture content. The environmental conditions were provided by means of an atmospheric conditioning unit, in which removable perforated trays were placed to allow air to pass through peanut mass, each one containing 50 g of the product. The mathematical models frequently

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Granella, Suian José, Taise Raquel Bechlin, and Divair Christ. "MODELAGEM DAS ISOTERMAS DE DESSORÇÃO E DO CALOR ISOSTÉRICO DE SEMENTES DE CROTALÁRIA." Nativa 8, no. 1 (2020): 124–28. http://dx.doi.org/10.31413/nativa.v7i6.7750.

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A manutenção da qualidade de sementes de crotalária (Crotalaria spectabilis Roth) por meio do equilíbrio higroscópico é uma forma de conhecer os níveis de teor de água seguros ao armazenamento. Desta forma, objetivou-se determinar as isotermas de dessorção de água das sementes de crotalária nas temperaturas de 5, 10, 15, 25 e 40 °C e atividades de água entre 0,204 e 0,877 (decimal), bem como obter os valores do calor isostérico de dessorção em função do teor de água de equilíbrio do produto. Para obtenção do teor de água de equilíbrio foi utilizado o método estático-gravimétrico. O modelo de C

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Jiang, Xiuping, Xiuping Jiang, Huanhuan Li, et al. "Moisture Sorption Isotherms and Isosteric Heats of Sorption of High-Pressure Treated Paulownia Wood under Different Storage Conditions." Transactions of the ASABE 62, no. 1 (2019): 105–14. http://dx.doi.org/10.13031/trans.12899.

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Abstract. Understanding of moisture sorption isotherms (MSI) is critical for predicting the stability of wood during handling, transport, and storage. The aim of this study was to evaluate the adsorption and desorption isotherm characteristics of high-pressure (HP) treated paulownia wood and to identify the best-fitting model to describe its sorption behavior. The equilibrium moisture contents (EMCs) of HP-treated paulownia wood were obtained using a static gravimetric method under different storage conditions: three temperatures (20°C, 30°C, and 40°C) and five water activity (aw) levels (0.32

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Mentasty, L., A. M. Woestyn, E. Basaldella, A. Kikot, and G. Zgrablich. "High-Pressure Methane Adsorption on NaX and NaY Zeolites with Different Si/Al Ratios." Adsorption Science & Technology 11, no. 4 (1994): 209–16. http://dx.doi.org/10.1177/026361749401100403.

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One method of increasing the storage capacity of compressed natural gas, an alternative for vehicular fuel, is by adsorbing it on to microporous solids such as zeolites or activated carbons. NaX and NaY zeolites with different Si/Al ratios have been synthesized and characterized. Experimental adsorption isotherms for CH4 on these zeolites have been obtained at different temperatures over a pressure range of 0–5 MPa using a high-pressure volumetric apparatus. Isosteric heats of adsorption have been estimated and the isotherms analyzed applying a statistical thermodynamic model. The efficiency o

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Makowski, Wacław. "Quasi-equilibrated temperature programmed desorption and adsorption: A new method for determination of the isosteric adsorption heat." Thermochimica Acta 454, no. 1 (2007): 26–32. http://dx.doi.org/10.1016/j.tca.2006.12.015.

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Zhang, Dongqing. "Modelling Methane Adsorption Isotherms on Shale at Different Temperatures." Atmosphere 13, no. 6 (2022): 865. http://dx.doi.org/10.3390/atmos13060865.

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Prediction of adsorption isotherms under different temperatures is significant to reserve estimation of shale gas reservoirs. Based on the Polanyi adsorption potential theory and Langmuir adsorption theory, a method was presented to predict adsorption isotherms at different temperatures. In this method, the relationship between Langmuir pressure and temperature was quantified. By utilizing this method, we predicted adsorption isotherms of Longmaxi shale from 45 °C to 120 °C according to experimental data at 30 °C. Meanwhile, by considering the pressure and temperature gradients, we also predic

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Saad, Amel, Boumediene Touati, Belkacem Draoui, Boufeldja Tabti, Asma Abdenebi, and Said Benaceur. "Mathematical Modeling of Moisture Sorption Isotherms and Determination of Isosteric Heats of Sorption ofZiziphusLeaves." Modelling and Simulation in Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/427842.

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Desorption and adsorption equilibrium moisture isotherms ofZiziphus spina-christileaves were determined using the gravimetric-static method at 30, 40, and 50°C for water activity(aw)ranging from 0.057 to 0.898. At a givenaw, the results show that the moisture content decreases with increasing temperature. A hysteresis effect was observed. The experimental data of sorption were fitted by eight models (GAB, BET, Henderson-Thompson, modified-Chung Pfost, Halsey, Oswin, Peleg, and Adam and Shove). After evaluating the models according to several criteria, the Peleg and Oswin models were found to b

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Cakicioglu-Ozkan, Fehime. "Adsorption of carbon dioxide on MIL53(Al), CuBTC and K- NaX zeolite." ICONTECH INTERNATIONAL JOURNAL 4, no. 3 (2020): 30–42. http://dx.doi.org/10.46291/icontechvol4iss3pp30-42.

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CO2 adsorption on K exchanged NaX zeolites, and metal organic frameworks (MOFs), namely Cu-BTC and MIL53 (Al) was studied at 5 °C and 25 °C. Exchange via ultrasonic and traditional methods, was conducted at 50 °C and 70 °C. The maximum replacement of Na+ ion with K+ ion in the extra framework of zeolite was increased from 76% to 83% with increasing temperature from 50 °C to 70 °C in the ultrasonic method which is more effective than traditional one. Compared with the zeolites, the MOF adsorbents used in this work have higher Langmuir specific surface area values namely 1278, 1473 and about 100

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Talla, André. "Predicting Sorption Isotherms and Net Isosteric Heats of Sorption of Maize Grains at Different Temperatures." International Journal of Food Engineering 10, no. 3 (2014): 393–401. http://dx.doi.org/10.1515/ijfe-2014-0047.

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Abstract In Sub-Saharan Africa, drying maize on their stem was the traditional technique frequently used; this technique must be improved to avoid contaminations and to increase the quality of drying. However, the method of storage is accountable for the most significant losses after harvest, because mildew develops when the conditions of storage (too high temperature and moisture of the air) do not tally with the final content of the dried product. Sorption isotherms of products are most important to model moisture uptake during storage and distribution. Sorption isotherms of intermediate moi

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Sears, W. M. "Isosteric Heat of Adsorption of Water Vapor on Bismuth Iron Molybdate Measured by the Method of Constant Surface Conductance." Langmuir 17, no. 17 (2001): 5237–44. http://dx.doi.org/10.1021/la001005c.

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Zhang, Yongchun, Aiguo Hu, Pei Xiong, Hao Zhang, and Zhonghua Liu. "Experimental Study of Temperature Effect on Methane Adsorption Dynamic and Isotherm." Energies 15, no. 14 (2022): 5047. http://dx.doi.org/10.3390/en15145047.

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Knowing the methane adsorption dynamic is of great importance for evaluating shale gas reserves and predicting gas well production. Many experiments have been carried out to explore the influence of many aspects on the adsorption dynamic of methane on shale rock. However, the temperature effect on the adsorption dynamic as a potential enhanced shale gas recovery has not been well addressed in the publications. To explore the temperature effect on the adsorption dynamic of methane on gas shale rock, we conducted experimental measurement by using the volumetric method. We characterized the adsor

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Zlatovic, Mario, Vladimir Sukalovic, Goran Roglic, Sladjana Kostic-Rajacic, and Deana Andric. "The influence of dispersive interactions on the binding affinities of ligands with an arylpiperazine moiety to the dopamine D2 receptor." Journal of the Serbian Chemical Society 74, no. 10 (2009): 1051–61. http://dx.doi.org/10.2298/jsc0910051z.

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Several isosteric 1,3-dihydro-5-[2-(4-aryl-1-piperazinyl)ethyl]-2H-benzimidazole-2-thiones were used to investigate the interactions of different ligands with the binding site of the D2 receptor. Due to limitations of the simulation methods, docking analysis failed to show precisely the interactions that influence the binding affinity of the ligands. It is presumed that dispersive forces or more precisely edge-to-face interactions play an important role in the binding process, especially for the lipophilic part of the ligands. In order to confirm this hypothesis, ab initio calculations were ap

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Meriama, Foullanine, Bennaceur Said, Loumani Akil, et al. "Experimental Determination and Modeling of the Moisture-Sorption Isotherms and Isosteric Heat of Tobacco Leaves." Instrumentation Mesure Métrologie 20, no. 5 (2021): 269–77. http://dx.doi.org/10.18280/i2m.200504.

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During a forced convection sun drying and storage operation, the equilibrium water content of a product to be dried is critical. These figures are frequently derived using isothermal sorption curves. The calculation of isotherms is a necessary step in determining the distribution and intensity of water connections in products. for that this paper concentrates on the experimental determination of the adsorption-desorption isotherms for various temperatures (40, 50, and 60℃) of the Nicotiana Tabacum L plants. From which we had established the relationship between the water activity and the water

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