@article { ISI:000268120200001, title = {Evaluation of repulsive particle swarm method for phase equilibrium and phase stability problems}, journal = {Fluid Phase Equilibria}, volume = {282}, number = {2}, year = {2009}, month = {AUG}, pages = {65-67}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Phase equilibrium and stability problems are of crucial importance in simulation, design and optimization of several separation processes. Recently, these problems have been solved using minimization of Gibbs free energy, using global optimization techniques. In this paper, repulsive particle swarm (RPS), a recent global optimization technique is explored for the Solution of phase stability and phase equilibrium. (C) 2009 Elsevier B.V. All rights reserved.

}, keywords = {Liquid-liquid equilibria, Phase equilibrium, Phase stability analysis, Repulsive particle swarm method}, issn = {0378-3812}, doi = {10.1016/j.fluid.2009.04.014}, author = {Rahman, Imran and Das, Anwesh Kr. and Mankar, Raju B. and Kulkarni, B. D.} } @article { ISI:000317352000009, title = {Hydrate phase equilibrium of ternary gas mixtures containing carbon dioxide, hydrogen and propane}, journal = {Journal of Chemical Thermodynamics}, volume = {61}, year = {2013}, month = {JUN}, pages = {58-63}, publisher = {ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD}, address = {24-28 OVAL RD, LONDON NW1 7DX, ENGLAND}, abstract = {

Hydrate phase equilibrium of the ternary guest mixtures containing carbon dioxide, hydrogen and propane at two different compositions were determined. Addition of mole composition of 2.5\% propane to the fuel gas (CO2 (40\%)/H-2 (60\%)) mixture reduces the hydrate formation conditions by 66\% at the temperature of 278.4 K. A Clausius-Clapeyron plot for the experimental results was plotted and from the slope, the enthalpy of hydrate dissociation was calculated. The enthalpy of dissociation of the mixed hydrate formed from a ternary gas mixture containing mole composition 38.1\% CO2, 59.4\% H-2 and 2.5\% C3H8 was found to be 110 kJ.mol(-1) and hence it was concluded that the mixed hydrate formed structure II (sII) hydrates. Whereas for the ternary gas mixture containing mole composition 80.0\% CO2, 18.8\% H-2, and 1.2\% C3H8, the enthalpy of dissociation of the mixed hydrate was found to be 78 kJ.mol(-1) and hence we believe the mixed hydrate formed structure I (sI) hydrate. (C) 2013 Elsevier Ltd. All rights reserved.

}, keywords = {Carbon dioxide capture, Gas hydrates, Global warming, Phase equilibrium, Pre-combustion, Thermodynamics}, issn = {0021-9614}, doi = {10.1016/j.jct.2013.02.003}, author = {Babu, Ponnivalavan and Yang, Ting and Veluswamy, Hari Prakash and Kumar, Rajnish and Linga, Praveen} } @article {45347, title = {Modelling of water-to-gas hollow fiber membrane humidifier}, journal = {Chemical Engineering Science }, volume = {192}, year = {2018}, month = {DEC}, pages = {955-971}, type = {Journal Article}, abstract = {

A microscopic mathematical model is developed for membrane based water-to-gas humidification by rigorously accounting for phase equilibrium between the membrane and water phases as well as membrane and gas phases in addition to the coupled heat and mass transfer occurring across the membrane. The model is then integrated along the length of a hollow fiber membrane humidifier in order to predict humidifier performance as a function of design variables, operating variables and operational strategies. For realistic values of membrane thickness and flow parameters, the model suggests that while membrane-gas interfacial resistance alone is crucial for heat transfer, the vapor transfer is governed by the combined resistances of diffusion within the membrane and membrane-gas interface. The model is validated against experimental data obtained using a commercial hollow fiber

}, keywords = {Coupled Heat and Mass, Fuel Cell Applications, Humidification, Phase equilibrium, Proton exchange membrane, Water-to-gas}, doi = {10.1016/j.ces.2018.08.015}, author = {Pandey, R. and Lele, A.} }