CFD study of CMR performance during SO3 decomposition
Volume Title: 1
1دانشگاه صنعتی ارومیه/دانشکده مهندسی شیمی
2دانشکده مهندسی شیمی، دانشگاه صنعتی ارومیه، ارومیه، ایران
3Chemical engineering department, Urmia University of Technology, Urmia, Iran
The possibility of applying a catalytic membrane reactor (CMR) to SO3 decomposition in a low-temperature range was theoretically evaluated with the purpose of producing CO2-free hydrogen in an IodineeSulfur thermochemical cycle. A two-dimensional, isothermal and plug-flow model was developed for a cocurrent membrane reactor with selective permeation from the reactant stream to the permeate stream. Simulation results have revealed that CMRs can greatly reduce the reaction temperature for SO3 decomposition from the conventional 1200-1400 K to about 900 K. We predicted that porous inorganic membranes with a high O2 permeability and with selectivities of more than 50 for O2/SO3 and less than 10 for O2/SO2 had the potential to effectively improve SO3 conversion. CMRs were simulated to carry out SO3 decomposition at different reaction temperatures, and pressures in feed and permeate streams. SO3 conversion at 900 K was increased to 0.93 beyond the equilibrium conversion of 0.28 due to a shift in thermodynamic equilibrium.