Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2010, Vol. 31 ›› Issue (10): 1195-1199.DOI: 10.1016/S1872-2067(10)60111-8

• Research Briefing • Previous Articles     Next Articles

Gas Phase Epoxidation of Propylene with TS-1 and in Situ H2O2 Produced by a H2/O2 Plasma

SU Ji1, ZHOU Juncheng1,2, LIU Chunyan1, WANG Xiangsheng1, GUO Hongchen1,*   

  1. 1State Key Laboratory of Fine Chemicals, Department of Catalytic Chemistry and Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China;      2 718th Research Institute of China Shipbuilding Industry Corporation, Handan 056027, Hebei, China
  • Received:2010-10-25 Online:2010-10-25 Published:2014-03-04

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Abstract: Gas phase epoxidation of propylene was performed by directly contacting propylene and gaseous H2O2 on the surface of TS-1 catalyst in an integrated reactor. The gaseous H2O2 was produced in situ by a H2/O2plasma. The H2O2 formation rate can be enhanced by increasing the power density of the H2/O2 plasma reactor. The yield and selectivity for propylene oxide (PO) can be increased by optimizing the reaction conditions and using suitable TS-1 catalysts. With a power injection of 3.5 W, flow rates of H2, O2, and propylene of 170, 8, and 18 ml/min, respectively, catalyst loading of 0.8 g, and epoxidation temperature of 110 oC, the yield and selectivity for PO and the utilization rate of H2O2 were 246.9 g/(kg•h), 95.4%, and 36.1%, respectively. During the gas phase reaction, no decline of TS-1 activity was observed.

Key words: plasma, hydrogen peroxide, titanium silicalite-1, gas-phase epoxidation of propylene, propylene oxide