(520c) MFI-Type Zeolite Membrane Reactor for High Temperature Ethane Dehydrogenation

Kim, S. J., Oklahoma State University
Ethene is the largest base chemical for the chemical industry and the increasing demand for ethene has stimulated substantial research into the development of new processes to reduce energy consumption. Catalytic ethane dehydrogenation using a packed bed membrane reactor (PBMR) is an attractive solution because the cracking equilibrium can be shifted in favor of ethylene by selective removal of hydrogen. In this study, we report the process intensification of ethane dehydrogenation reaction in PBMR operating with a Pt/Al2O3 catalyst. The effects of MFI zeolite membranes on ethane conversion and ethene selectivity are investigated. Increasing the reaction temperature and pressure helped in enhancing H2 permeation across the membrane, which significantly increased the ethane conversion. It is demonstrated that medium-pore MFI membranes with moderate H2/C2H6 selectivity can be effective in enhancing ethane conversion at high operation temperature by timely removal of H2 through the membranes.