物理化学学报 >> 2010, Vol. 26 >> Issue (02): 345-349.doi: 10.3866/PKU.WHXB20100228

催化和表面结构 上一篇    下一篇

射频等离子体技术制备合成低碳醇用新型Cu-Co/SiO2催化剂

徐慧远, 储伟, 邓思玉   

  1. 四川大学化工学院, 成都 610065
  • 收稿日期:2009-09-29 修回日期:2009-12-08 发布日期:2010-01-26
  • 通讯作者: 储伟 E-mail:chuwei65@yahoo.com.cn

Preparation of Copper-Cobalt-Silicon Catalysts for Higher Alcohol Synthesis by Glow Discharge Plasma

XU Hui-Yuan, CHU Wei, DENG Si-Yu   

  1. College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
  • Received:2009-09-29 Revised:2009-12-08 Published:2010-01-26
  • Contact: CHU Wei E-mail:chuwei65@yahoo.com.cn

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摘要：

采用射频等离子体技术制备新型Cu-Co/SiO2催化剂. 与直接焙烧制备的样品相比, 射频等离子体处理提高了催化剂的比表面积, 显著增大了活性物种Co的表面含量, 有效改进了催化剂的还原性能. 以CO加氢合成低碳混合醇为模型反应, 在563 K, 5.0 MPa, 6000 h-1, V(H2):V(CO)=1.6的条件下, 等离子体处理和等离子体处理后再焙烧样品比673 K 焙烧样品的催化活性提高30.46%和65.30%, 低碳醇的时空收率分别提高58.22%和76.11%.

关键词: 射频等离子体, 一氧化碳加氢, 铜钴基催化剂, 低碳醇

Abstract:

Novel Cu-Co/SiO2 catalysts were prepared by conventional impregnation methods with the assistance of glow discharge plasma technology. Compared with a conventional calcined sample, the plasma remarkably improved the specific surface area of the catalyst and increased the concentration of active cobalt species on the catalyst's surface. The reducibility of the cobalt was effectively improved as well. Catalytic test results showed that comparison to the conventional 673 K calcined sample, the CO hydrogenation activity of the two plasma enhanced samples (one treated only by plasma and the other assisted by plasma followed by calcination) increased by 30.46% and 65.30%, respectively. Their time space yields of higher alcohols also increased by 58.22% and 76.11%, respectively, under 5.0 MPa, 6000 h-1, 563 K and a H2 /CO volume ratio of 1.6.

Key words: Glow discharge plasma, CO hydrogenation, Copper-cobalt based catalyst, Higher alcohol

MSC2000: 

  • O643