催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (10): 1195-1199.DOI: 10.1016/S1872-2067(10)60111-8

• 研究快讯 • 上一篇    下一篇

基于 H2/O2 等离子体和钛硅沸石的丙烯气相环氧化方法

苏际 1, 周军成 1,2, 刘春燕 1, 王祥生 1, 郭洪臣 1   

  1. 1大连理工大学催化化学与工程系精细化工国家重点实验室, 辽宁大连 116012; 2中国船舶重工集团公司第七一八研究所, 河北邯郸 056027
  • 收稿日期:2010-10-25 出版日期:2010-10-25 发布日期:2014-03-04

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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摘要： 将 H2/O2 非平衡等离子体现场产生的气态 H2O2和丙烯与耦合反应器中钛硅沸石 TS-1 直接接触, 实现了丙烯气相环氧化反应. 结果表明, 非平衡等离子体生成气态 H2O2 的速率由介质阻挡放电的输入功率决定, 环氧丙烷的生成速率和选择性取决于钛硅沸石催化剂和反应条件. 在 H2 和 O2 进料流量分别为 170 和 8 ml/min, 介质阻挡放电输入功率为 3.5 W, 环氧化反应温度为 110 oC, 丙烯进料量为 18 ml/min, 催化剂用量为 0.8 g 的条件下, 生成环氧丙烷产率达 246.9 g/(kg•h)、环氧丙烷选择性和 H2O2 有效利用率分别为 95.4% 和 36.1%, 反应 36 h 内未见催化剂失活.

关键词: 等离子体, 过氧化氢, 钛硅分子筛, 气相丙烯环氧化, 环氧丙烷

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