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Relevant bibliographies by topics / Reaction systems; Polymer reptation

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Academic literature on the topic 'Reaction systems; Polymer reptation'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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Journal articles on the topic "Reaction systems; Polymer reptation"

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Semenov, A. N., and M. Rubinstein. "Dynamics of strongly entangled polymer systems: activated reptation." European Physical Journal B 1, no. 1 (January 1998): 87–94. http://dx.doi.org/10.1007/s100510050155.

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FALLER, ROLAND, MATHIAS PÜTZ, and FLORIAN MÜLLER-PLATHE. "ORIENTATION CORRELATION IN SIMPLIFIED MODELS OF POLYMER MELTS." International Journal of Modern Physics C 10, no. 02n03 (May 1999): 355–60. http://dx.doi.org/10.1142/s0129183199000267.

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We investigate mutual local chain order in systems of fully flexible polymer melts in a simple generic bead-spring model. The excluded-volume interaction together with the connectivity leads to local ordering effects which are independent of chain length between 25 and 700 monomers, i.e. in the Rouse as well as in the reptation regime. These ordering phenomena extend to a distance of about 3 to 4 monomer sizes and decay to zero afterwards.

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Kolinski, Andrzej, Jeffrey Skolnick, and Robert Yaris. "Does reptation describe the dynamics of entangled, finite length polymer systems? A model simulation." Journal of Chemical Physics 86, no. 3 (February 1987): 1567–85. http://dx.doi.org/10.1063/1.452196.

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Oshanin, G. S., and S. F. Burlatsky. "Reaction kinetics in polymer systems." Journal of Statistical Physics 65, no. 5-6 (December 1991): 1109–22. http://dx.doi.org/10.1007/bf01049601.

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Skolnick, Jeffrey, Andrzej Kolinski, and Robert Yaris. "Monte Carlo studies of the long-time dynamics of dense polymer systems. The failure of the reptation model." Accounts of Chemical Research 20, no. 9 (September 1987): 350–56. http://dx.doi.org/10.1021/ar00141a006.

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Feng, Lian-Fang, and Guo-Hua Hu. "Reaction kinetics of multiphase polymer systems under flow." AIChE Journal 50, no. 10 (2004): 2604–12. http://dx.doi.org/10.1002/aic.10253.

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Millan, Daniela, Mafalda R. Almeida, Ana F. C. S. Rufino, João A. P. Coutinho, and Mara G. Freire. "Nucleophilic degradation of diazinon in thermoreversible polymer–polymer aqueous biphasic systems." Physical Chemistry Chemical Physics 23, no. 7 (2021): 4133–40. http://dx.doi.org/10.1039/d0cp06086k.

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Johnston-Hall, Geoffrey, and Michael J. Monteiro. "Termination in Semi-Dilute and Concentrated Polymer Solutions." Australian Journal of Chemistry 62, no. 8 (2009): 857. http://dx.doi.org/10.1071/ch09089.

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The aim of the present work was to develop a deeper understanding into termination processes in the semi-dilute and concentrated regimes. The study was carried out to examine the effect of termination between linear polystyrene radical chains in linear, four-arm star, and six-arm star polymer systems using the reversible addition–fragmentation chain transfer chain length-dependent termination method. In particular, the power-law dependencies of both chain length and polymer concentration were evaluated in the semi-dilute and concentrated regimes. We found that theoretical predictions based on the blob model were in good agreement with the experimentally observed evolution of the rate coefficient for biomolecular termination, kti,i(x), in the semi-dilute solution regime. In addition, solvent quality was found to decrease with increasing chain length, increasing polymer concentration and as a function of the matrix topology (i.e. for star polymer solutions). In the concentrated solution regime, the role of chain entanglements became evident by determining the conversion-dependent power-law exponent, βgel (where kt ≈ x–βgel), which increased in the order: linear < four-arm star < six-arm star polymer systems. Above the critical chain length ic, termination was found to be primarily conversion-dependent, implying entanglements dominated termination between linear polymeric radicals. Although this may suggest that reptation plays an important role, our data are in disagreement with this theory, suggesting that the polymer matrix cannot be regarded as static or immobile on the diffusion time scales for bimolecular termination.

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von Meerwall, Ernst D. "Pulsed and Steady Field Gradient NMR Diffusion Measurements in Polymers." Rubber Chemistry and Technology 58, no. 3 (July 1, 1985): 527–60. http://dx.doi.org/10.5254/1.3536078.

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Abstract Some twenty years after the development of the steady and pulsed gradient spin-echo NMR methods of measuring self-diffusion, these techniques are now maturing and experiencing a surge of interest, much of it concentrated on polymer systems. The methods are briefly reviewed here, together with the most important results in polymers, with particular concentration on work described within the last few years. The research is divisible into three categories: diffusion of diluent and penetrant molecules in rubbery high polymers, diffusion of polymer molecules in dilute and semidilute solutions with liquid solvents, and diffusion of macromolecules dissolved in concentrated solutions or melts of equivalent or different polymers of arbitrary molecular weight. The review includes the main theoretical interpretations of the experiments, particularly the free-volume theory in its various forms and power-law behaviors postulated by recent refinements of tube/reptation and scaling theory. This article represents an updated elaboration of an earlier review.

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Lísal, Martin, John K. Brennan, and William R. Smith. "Mesoscale simulation of polymer reaction equilibrium: Combining dissipative particle dynamics with reaction ensemble Monte Carlo. I. Polydispersed polymer systems." Journal of Chemical Physics 125, no. 16 (October 28, 2006): 164905. http://dx.doi.org/10.1063/1.2359441.

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Dissertations / Theses on the topic "Reaction systems; Polymer reptation"

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Richardson, M. J. E. "Two-species non-equilibrium processes in one dimension." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362106.

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Vaughan, Asa Dee Byrne Mark E. "Reaction analysis of templated polymer systems." Auburn, Ala., 2008. http://hdl.handle.net/10415/1538.

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McGee, Seán. "Thermal energy management and chemical reaction investigation of micro-proton exchange membrane fuel cell and fuel cell system using finite element modelling." Thesis, KTH, Kraft- och värmeteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173001.

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Fuel cell systems are becoming more commonplace as a power generation method and are being researched, developed, and explored for commercial use, including portable fuel cells that appear in laptops, phones, and of course, chargers. This thesis examines a model constructed on inspiration from the myFC PowerTrekk, a portable fuel cell charger, using COMSOL Multiphysics, a finite element analysis software. As an educational tool and in the form of zero-dimensional, two-dimensional, and three-dimensional models, an investigation was completed into the geometric construction, air conditions and compositions, and product materials with a best case scenario completed that summarizes the results identified. On the basis of the results of this research, it can be concluded that polyoximetylen and high-density polyethylene were considered as possible materials for the majority of the product, though a more thorough investigation is needed. Air flow of above 10 m/s, air water vapour mass fraction below 50% and initial temperature between 308K and 298K was considered in this best scenario. Suggestions on future expansions to this project are also given in the conclusion.

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Jalal, Ahmed Hasnain. "Multivariate Analysis for the Quantification of Transdermal Volatile Organic Compounds in Humans by Proton Exchange Membrane Fuel Cell System." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3886.

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In this research, a proton exchange membrane fuel cell (PEMFC) sensor was investigated for specific detection of volatile organic compounds (VOCs) for point-of-care (POC) diagnosis of the physiological conditions of humans. A PEMFC is an electrochemical transducer that converts chemical energy into electrical energy. A Redox reaction takes place at its electrodes whereas the volatile biomolecules (e.g. ethanol) are oxidized at the anode and ambient oxygen is reduced at the cathode. The compounds which were the focus of this investigation were ethanol (C2H5OH) and isoflurane (C3H2ClF5O), but theoretically, the sensor is not limited to only those VOCs given proper calibration. Detection in biosensing, which needs to be carried out in a controlled system, becomes complex in a multivariate environment. Major limitations of all types of biosensors would include poor selectivity, drifting, overlapping, and degradation of signals. Specific detection of VOCs in multi-dimensional environments is also a challenge in fuel cell sensing. Humidity, temperature, and the presence of other analytes interfere with the functionality of the fuel cell and provide false readings. Hence, accurate and precise quantification of VOC(s) and calibration are the major challenges when using PEMFC biosensor. To resolve this problem, a statistical model was derived for the calibration of PEMFC employing multivariate analysis, such as the “Principal Component Regression (PCR)” method for the sensing of VOC(s). PCR can correlate larger data sets and provides an accurate fitting between a known and an unknown data set. PCR improves calibration for multivariate conditions as compared to the overlapping signals obtained when using linear (univariate) regression models. Results show that this biosensor investigated has a 75% accuracy improvement over the commercial alcohol breathalyzer used in this study when detecting ethanol. When detecting isoflurane, this sensor has an average deviation in the steady-state response of ~14.29% from the gold-standard infrared spectroscopy system used in hospital operating theaters. The significance of this research lies in its versatility in dealing with the existing challenge of the accuracy and precision of the calibration of the PEMFC sensor. Also, this research may improve the diagnosis of several diseases through the detection of concerned biomarkers.

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Legrand, Sacha. "STEREOSELECTIVITY AND REGIOSELECTIVITYIN ORGANIC CHEMISTRY: NOVEL SYSTEMS ANDAPPLICATIONS." Phd thesis, 2006. http://tel.archives-ouvertes.fr/tel-00080096.

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Molecular recognition has become a very important field of research in chemistry during the last decades. This
chemical phenomenon is responsible for all processes occurring in biology and asymmetric synthesis is based
upon the capability of molecules or substrates to recognise each other in a selective manner. In this thesis, the
design, preparation and evaluation of a series of new synthetic receptors has been described. The importance of
regioselectivity and stereoselectivity in molecular recognition has also been underlined with two different
biological examples.
The capability of host molecules, derived from (+)-tartaric acid, to accommodate various guests in a selective
manner was demonstrated using 1H-NMR spectroscopy (paper I). These host molecules, known as TADDOLs,
enantioselectively recognised the valuable chiral alcohols glycidol and menthol. Macromolecular receptors, i.e.
molecularly imprinted polymers (MIPs), were also prepared in order to catalyse the aldol reaction between either
(R)- or (S)-camphor and benzaldehyde (paper II). With the help of analytical methods, it was demonstrated that
the MIPs interacted in a selective manner with the enantiomers of camphor. Moreover, these MIPs enhanced
significantly the rate of the aldol condensation mentioned above.
Regarding biological systems, various regioisomeric analogues of benzoic acid have been tested as antifeedants
against the pine weevil Hylobius abietis (paper III and IV). The regioisomers studied displayed very different
antifeedant activities. The significance of stereoisomerism on pheromone function has been shown in the
preparation of lures for the control of the insect pest Argyrotaenia sphaleropa (paper V). It was demonstrated that
male leafrollers could be caught by a lure containing components of the female sex pheromone gland.

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Bahutski, Viktar. "Development of Viable Synthetic Approaches to Highly Functionalized Small Ring Systems - Synthesis of Novel Cyclopropylacrylates as Monomers for Low-Shrinkage Polymer-Composites." Doctoral thesis, 2004. http://hdl.handle.net/11858/00-1735-0000-0006-B0A8-E.

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Books on the topic "Reaction systems; Polymer reptation"

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Pauer, Werner, ed. Polymer Reaction Engineering of Dispersed Systems. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73479-8.

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Pauer, Werner, ed. Polymer Reaction Engineering of Dispersed Systems. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-96436-2.

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Pauer, Werner. Polymer Reaction Engineering of Dispersed Systems: Volume I. Springer, 2018.

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Pauer, Werner. Polymer Reaction Engineering of Dispersed Systems: Volume II. Springer, 2018.

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Book chapters on the topic "Reaction systems; Polymer reptation"

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Griskey, Richard G. "Chemical Reaction Kinetics in Polymer Systems." In Polymer Process Engineering, 249–77. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0581-1_6.

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Asua, José M. "Challenges in Polymerization in Dispersed Media." In Polymer Reaction Engineering of Dispersed Systems, 1–22. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_21.

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Cunningham, Michael F., Philip G. Jessop, and Ali Darabi. "Stimuli-Responsive Latexes Stabilized by Carbon Dioxide Switchable Groups." In Polymer Reaction Engineering of Dispersed Systems, 143–59. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_6.

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Zhang, Yujie, and Marc A. Dubé. "Green Emulsion Polymerization Technology." In Polymer Reaction Engineering of Dispersed Systems, 65–100. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_8.

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Wu, Hua, Dan Wei, and Massimo Morbidelli. "The Generalized Stability Model and Its Applications in Polymer Colloids." In Polymer Reaction Engineering of Dispersed Systems, 79–104. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_9.

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Costa, L. Ivano, and G. Storti. "Kinetic Modeling of Precipitation and Dispersion Polymerizations." In Polymer Reaction Engineering of Dispersed Systems, 45–77. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_13.

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Hungenberg, Klaus-Dieter, and Ekkehard Jahns. "Trends in Emulsion Polymerization Processes from an Industrial Perspective." In Polymer Reaction Engineering of Dispersed Systems, 195–214. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_14.

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Zhu, He, Lei Lei, Bo-Geng Li, and Shiping Zhu. "Development of Novel Materials from Polymerization of Pickering Emulsion Templates." In Polymer Reaction Engineering of Dispersed Systems, 101–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_15.

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Kiparissides, Costas. "Modeling of Suspension Vinyl Chloride Polymerization: From Kinetics to Particle Size Distribution and PVC Grain Morphology." In Polymer Reaction Engineering of Dispersed Systems, 121–93. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_16.

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Kroupa, Martin, Michal Vonka, Miroslav Soos, and Juraj Kosek. "Probing Coagulation and Fouling in Colloidal Dispersions with Viscosity Measurements: In Silico Proof of Concept." In Polymer Reaction Engineering of Dispersed Systems, 161–82. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/12_2017_17.

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Conference papers on the topic "Reaction systems; Polymer reptation"

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Fredenburg, A., J. Coe, K. Maerzke, J. Lang, D. Dattelbaum, and D. Sandoval. "Estimating the reaction onset for porous polymer systems." In SHOCK COMPRESSION OF CONDENSED MATTER - 2017: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. Author(s), 2018. http://dx.doi.org/10.1063/1.5044860.

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Mohankumar, K. V., and K. Kannan. "A New Approach in Kinetic Modeling Using Thermodynamic Framework for Chemically Reacting Systems and Oxidative Ageing in Polymer Composites." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64436.

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A thermodynamic framework for chemically reacting systems is put to use in kinetic modeling of any chemical system with N species undergoing M reactions. A new approach of deriving kinetic models from a Gibbs potential, of multivariate polynomial function, is demonstrated with an example of single reaction system involving three species. Also, the usual first order kinetics is deduced as a special case in the example. The distinct advantages of the new approach lies in obtaining the evolution of concentrations of species, their individual chemical potentials and the specific Gibbs potential and is demonstrated for a single reaction system as an example. Oxidation in polymer composites is studied with a coupled reaction-diffusion model obtained using first order kinetics and is solved for a boundary value problem that predicts the concentration of species over space and time. Concentration of oxidized products is correlated with modulus of aged sample and degradation effects is calculated in case of simple torsion.

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Tandon, G. P., T. Gibson, J. Shumaker, R. Coomer, J. Baur, and R. S. Justice. "Processing and Characterization of Novel Bismaleimide-Based Shape Memory Polymer Composites." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-7936.

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In the present study, a series of novel linear polyaspartimide-based silane endcapped (cross-linked) polymers are synthesized using 4-4′ bismaleimidodiphenylmethane, Jeffamine D-400 (BMI-JA-400), and (3-Aminopropyl) trimethoxysilane. To add strength to these systems, the trimethoxysilane moiety is cross-linked with the addition of water to create a thermosetting material with both improved toughness and variable cross-link densities. Thermal analysis is done to evaluate the developed shape-memory polymer (SMP) resin for composite processing feasibility. The solvent content in the resin and thermal stability is monitored using thermogravimetric analysis (TGA) while advanced rheometric expansion system (ARES) with parallel plate geometry is used to measure viscosity variation with temperature. The resin BMI-JA-400-Si-70/30 is chosen for making the composite based on its viscosity, weight change, and kinetic results. Differential scanning calorimetry (DSC) is performed to determine the cure kinetics including the temperatures at which the cure reaction initiates and completes in order to develop the cure cycle for composite fabrication. The selected SMP resin is hand-impregnated with T-300 plain-weave and T-700 uni-weave carbon fabric. Six-ply composites are successfully fabricated with < 2% void content using both fabric weaves. The thermo-mechanical properties of the SMP resin are measured using dynamic mechanical analysis (DMA). In addition, the shape memory cycle with free recovery is conducted on the SMP resin and composites.

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Sundaresan, Vishnu-Baba, and Sergio Salinas. "Integrated Bioderived-Conducting Polymer Membrane Nanostructures for Energy Conversion and Storage." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8170.

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Conducting polymers are ionic active materials that can perform electro-chemo-mechanical work through redox reactions. The electro-chemo-mechanical coupling in these materials has been successfully applied to develop various application platforms (actuation systems, sensor elements and energy storage devices (super capacitors, battery electrodes)). Similarly, bioderived membranes are ionic active materials that have been demonstrated as actuators, sensors and energy harvesting devices. Bioderived membranes offer significant advantages over synthetic ionic active materials in energy conversion and the scientific community has put forward various system level concepts for application in engineering applications. The biological origins of these material systems and their subsequent mechanical, electrical and thermal properties have served as a key deterrent in applications. This article proposes a novel architecture that combines a conducting polymer and a bioderived membrane into an integrated material system in which the charge gradients generated from a biochemical reaction is stored and released in the conducting polymer through redox reactions. This paper discusses the fabrication and topographical characterization of the integrated bioderived-conducting polymer membrane nanostructures. The prototype comprises of an organized array of fluid-filled three-dimensional containers with an integrated membrane shell that performs energy conversion and storage owing to its multi-functional microstructure. The bioderived membrane is self-assembled into a hollow spherical container from synthetic membranes or bilayer lipid membranes with proteins and the conducting polymer membrane forms a wrapper around this container resulting in a three-dimensional assembly.

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Satyanarayana, Srinath, Daniel T. McCormick, and Arun Majumdar. "Nanomechanical Biosensor Using Polymer Membranes." In ASME 2004 3rd Integrated Nanosystems Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/nano2004-46033.

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In recent years several surface stress sensors based on microcantilevers have been developed for biosensing [1–4]. Since these sensors are made using standard microfabrication processes, they can be easily made in an array format, making them suitable for high-throughput multiplexed analysis. Specific reactions occurring on one surface (enabled by selective modification of the surface a priori) of the sensor element change the surface stress, which in turn causes the sensor to deflect. The magnitude and the rate of deflection are then used to study the reaction. The microcantilevers in these sensors are usually fabricated using material like silicon and its oxides or nitrides. The high elasticity modulus of these materials places limitations on the sensitivity and sensor geometry. Alternately polymers, which have a much lower elastic modulus when compared to silicon or its derivatives, offers greater design flexibility, i.e. allow the exploration of innovative sensor configurations that can have higher sensitivity and at the same time are suitable for integration with microfluidics and electrical detection systems.

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Pan, Feng, Abdoul Kader Maiga, and Po-Hao Adam Huang. "Solvent-Based Polymer Swelling Characterization for the Development of the Nano/Micro-Particle Polymer Composite MEMS Corrosion Sensor." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-40145.

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The concept of using Micro-Electro-Mechanical Systems (MEMS) for in-situ corrosion sensing and for long-term applications has been proposed and is currently under development by our research lab. This is a new type of sensing using MEMS technology and, to the knowledge of our team, has not been explored previously. The MEMS corrosion sensor is based on the oxidation of metal nano/micro-particle embedded in elastomeric polymer to form a composite sensing element. The polymer controls the diffusion into and out of the sensor while the corrosion of the metal particles inhibits electrical conduction which is used as the detection signal. The work presented here is based on part of the methods developed for the removal of native and process-induced metal oxides. A major aspect is the study of the swelling dynamics of the polymer matrix (polydimethylsiloxane, PDMS) intended for enhancing material transport of etchants into and reaction products out of the composite during oxide removal. More specifically, the characterization of the swelling of copper particles-PDMS composite samples in liquid solvent baths is presented.

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Wang, Yun, and Xiaoguang Yang. "Transients of Polymer Electrolyte Fuel Cell and Hydrogen Tank." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90242.

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This paper seeks to develop 3D dynamic models for polymer electrolyte fuel cells (PEFCs) and hydrogen tanks, respectively. The dynamic model of PEFCs consists of multiple layers of a single PEFC and couples the various dynamic mechanisms in fuel cells, such as electrochemical double-layer discharging/charging, species transport, heat transfer, and membrane water uptake. The one of hydrogen tanks includes a 3D description of the hydride kinetics coupled with mass/heat transport in the hydrogen tank. Transient of fuel cell during step change in current is simulated. Dynamic responses of the cell voltage and heat generation rate are discussed. Hydrogen absorption process in the tank is considered. Temperature, reaction rate and heat rejection in the fuel tank are presented. Efforts are also made to discuss the coupling of these two systems in practice and associated issues.

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Wang, Yun. "Dynamic Characteristics of Polymer Electrolyte Fuel Cell and Hydrogen Tank." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23005.

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In this paper, we develop 3D dynamic models for polymer electrolyte fuel cells (PEFCs) and hydrogen tanks, respectively. The PEFC model considers the key components of a single PEFC and couples the various mechanisms that govern fuel cell transient including the electrochemical double-layer behavior, species transport, heat transfer, liquid water dynamics, and membrane water uptake. The hydrogen tank model includes a 3D description of the hydrogen discharging kinetics coupled with mass/heat transport in a LaNi5–based hydrogen tank. Efforts are made to discuss the dynamic characteristics of the PEFC and hydrogen tank together with the possible coupling of the two systems. Local electrochemical and hydride reaction rates, transport processes and associated limiting factors are investigated.

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Wang, Yun. "3D Modeling of Polymer Electrolyte Fuel Cell and Hydride Hydrogen Storage Tank." In ASME 2010 4th International Conference on Energy Sustainability. ASMEDC, 2010. http://dx.doi.org/10.1115/es2010-90138.

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3D dynamic models are developed for polymer electrolyte fuel cells (PEFCs) and hydrogen tanks, respectively. In the fuel cell model, we consider the major transport and electrochemical processes within the key components of a single PEFC that govern fuel cell transient including the electrochemical double-layer behavior, mass/heat transport, liquid water dynamics, and membrane water uptake. As to modeling hydrogen tanks, we consider a LaNi5-based system and develop a general formula that describes hydrogen absorption/desorption. The model couples the hydride reaction kinetics and mass/heat transport. The dynamic characteristics of the PEFC and hydrogen tank, together with the possible coupling of the two systems, are discussed.

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Bakhtiyarov, Sayavur I., Azizaga Kh Shakhverdiyev, Geilani M. Panakhov, and Eldar M. Abbasov. "Polymer/Surfactant Effects on Generated Volume and Pressure of CO2 in EOR Technology." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37100.

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Dense phase gases (carbon dioxide, nitrogen, light hydrocarbons, etc.) are used to develop miscibility with crude oil in enhanced oil recovery processes. Due to the certain reasons, carbon dioxide (CO2) flooding is considered the fastest-growing improved oil recovery method. However, due to the low viscosity of dense CO2, displacement front instabilities and a premature CO2 breakthrough is observed in many cases. An alternative scheme to the traditional methods of oil recovery by injection of carbon dioxide gas is the technology developed by the NMT, IGDFF and IMM, which proposes in-situ CO2 generation as a result of the thermochemical reaction between water solutions of the gas-forming (FG) and gas-yielding (GY) chemical agents injected to the productive horizons. This technique excludes CO2 injection from surface communication systems and does not require expensive delivery equipment. This process allows avoiding many negative consequences of CO2 injection technology. Based on the in-situ CO2 generation concept, several new technological schemes were developed in order to provide an integrative effect on the productive horizons. In this paper we present the results of the experimental studies on effect of polymer and surfactant additives on generated CO2 miscibility. The solutions of gas-yielding (GY) agent with different concentrations of surfactants and polymer additives were used as a reacting agent in these laboratory studies. Within the limits of the experimental conditions stochiometric reactions between gas-yielding (GY) and gas-forming (GF) water solutions were simulated. The tests were conducted on the experimental set up designed and built for these purposes. In the first series of experiments a polyacrylamide was added to the gas-yielding (GY) agent in the concentrations 0.1, 0.25 and 0.5 wt.%. A dynamics of the pressure changes during stoichiometric reaction was recorded. It is shown that the pressure of the generated CO2 gas significantly depends on concentration of the polymer additive and, as a consequence, on viscosity of the water solution. It slightly depends on the concentration of the surfactant added to the GY reactant.

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