物理化学学报 >> 1992, Vol. 8 >> Issue (02): 212-217.doi: 10.3866/PKU.WHXB19920214

研究论文 上一篇    下一篇

CO氢化催化剂表面活性位的动态法研究

邓向阳; 刘旦初   

  1. 复旦大学化学系,上海 200433
  • 收稿日期:1990-10-29 修回日期:1991-06-08 发布日期:1992-04-15
  • 通讯作者: 刘旦初

The Study on Surface Site of Catalyst for CO Hydrogenation with the Transient Analysis

Deng Xiang-Yang; Liu Dan-Chu   

  1. Department of Chemistry of Fudan University, Shanghai 200433
  • Received:1990-10-29 Revised:1991-06-08 Published:1992-04-15
  • Contact: Liu Dan-Chu

摘要: 用程序升温表面反应(TPSR)和程序升温还原(TPR)以及过渡应答(TR)等动态手段研究Ni/Al_2O_3催化剂表面上CO氢化反应的活性位状况。结果表明, 催化剂表面存在两种类型的活性位。其中A位来自表面上的聚晶体Ni, B位来自Ni与载体Al_2O_3强相互作用形成的Ni-Al化合物。实验结果还表明, CO在两个活性位都有吸附, 但在有H_2参与的条件下, 会影响二个活性位上的CO吸附量。

关键词: Ni/Al2O3催化剂, CO氢化, 程序升温表面反应, 程序升温还原, 过渡应答

Abstract: The state of surface site of catalyst for CO hydrogenation was studied with TPSR, TPR and TR. Results show that there are two kinds of active sites on the surface of Ni/Al_2O_3 catalysts. The site A comes from crystallite of Ni exposed on the surface, while the site B comes from Ni-Al intermediate which formed by the strong interaction of Ni with the support Al_2O_3. Results also show that the CO can be adsorbed on both sites, if active hydrogen is adsorbed on the surface, the ratio of adsorbed CO on both sites will be changed.

Key words: Ni/Al2O3 catalysts, CO hydrogenation, TPSR, TPR, TR