Commenced in January 2007
Paper Count: 30174
CFD Modeling of PROX Microreactor for Fuel Processing
Abstract:In order to investigate a PROX microreactor performance, two-dimensional modeling of the reacting flow between two parallel plates is performed through a finite volume method using an improved SIMPLE algorithm. A three-step surface kinetics including hydrogen oxidation, carbon monoxide oxidation and water-gas shift reaction is applied for a Pt-Fe/γ-Al2O3 catalyst and operating temperatures of about 100ºC. Flow pattern, pressure field, temperature distribution, and mole fractions of species are found in the whole domain for all cases. Also, the required reactive length for removing carbon monoxide from about 2% to less than 10 ppm is found. Furthermore, effects of hydraulic diameter, wall temperature, and inlet mole fraction of air and water are investigated by considering carbon monoxide selectivity and conversion. It is found that air and water addition may improve the performance of the microreactor in carbon monoxide removal in such operating conditions; this is in agreement with the pervious published results.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1329759Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1123
 H. Jing, "Mathematical and empirical modeling of chemical reactions in a microreactor," Ph.D. dissertation, College of Eng. & Science, Louisiana Tech Univ., United States, 2004.
 Y. Choi, H.G. Stenger, "Kinetics, simulation and insights for CO selective oxidation in fuel cell applications," Journal of Power Sources, 129, 2004, pp. 246-254.
 X. Ouyang, L. Bednarova, and R.S. Besser, "Preferential oxidation (PrOx) in a thin-film catalytic microreactor: Advantages and Limitations," AIChE Journal, 51, 2005, pp. 1758-1771.
 M. Ternan, "Hydrogen production from small fuel processors," H Power Enterprises of Canada Inc., Internal report, E-99-013-PF-Rev.0, 1999.
 A. Sirijaruphan, J.G. Goodwin, and R.W. Rice, "Effect of temperature and pressure on the surface kinetic parameters of Pt//╬│-Al2O3 during selective CO oxidation," Journal of Catalysis, 227, 2004, pp. 547-551.
 X. Ouyang, R.S. Besser, "Effect of reactor heat transfer limitations on CO preferential oxidation," Journal of Power Sources, 141, 2005, pp. 39-46.
 G. Karniadakis, A. Beskok, and N. Aluru, Microflows and Nanoflows - Fundamentals and Simulation, New York: Springer, 2005.
 S.R. Turns, An Introduction to Combustion, New York: McGraw-Hill, 2000.