464110 Effect of Ni-doping on the Hydrogen Permeation Flux  in La5.5WO111.25 Mixed Protonic-Electric Conductor

Tuesday, November 15, 2016: 9:10 AM
Plaza B (Hilton San Francisco Union Square)
Libin Zhuang, School of Chemistry & Chemical Engineering, South China University of Technology,China, Guangzhou, China, Yanying Wei, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China and Haihui Wang, The Key Laboratory of Enhanced Heat Transfer and Energy Conversation Ministry of Education, South China University of Technology, Guangzhou, China

Ethylene is used as a raw material for producing various polymers. Currently, thermal steam cracking is the conventional process technology for ethylene production. However, the dehydrogenation of ethane dehydrogenation through thermal steam cracking is an expensive and energy intensive process, because the dehydrogenation of ethane is endothermic and is limited by the thermodynamic equilibrium. According to the characteristic of the reaction, the membrane reactor combines the reaction and separation process in a single step. Consequently, the limited-equilibrium reaction is able to shift to the product side. In this study, the performance of a dense ceramic hydrogen permeable membrane reactor for the ethane dehydrogenation, according to the equilibrium reaction C2H6 ⇆ C2H4 + H2 with a Pt-Sn/Al2O3 catalyst was investigated. A dual-phase ceramic membrane with extremely high hydrogen permeation flux flow has been used for the in situ removal of H2 to overcome thermodynamic constraints. The conversion of ethane in membrane reactor could be increased by ~15% at 775℃, in comparion with the fixed-bed reactor. Meanwhile, about 75% ethylene selectivity was obtained.

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See more of this Session: Membrane Reactors
See more of this Group/Topical: Separations Division