物理化学学报 >> 2002, Vol. 18 >> Issue (10): 901-906.doi: 10.3866/PKU.WHXB20021007

研究论文 上一篇    下一篇

硫化CoMo/Al2O3-TiO2催化剂上CO催化还原SO2的研究

张文华;彭江杰;马运生;郝立庆;庄叔贤   

  1. 中国科学技术大学化学物理系,合肥　230026
  • 收稿日期:2002-01-18 修回日期:2002-04-08 发布日期:2002-10-15
  • 通讯作者: 庄叔贤 E-mail:szhuang@ustc.edu.cn

Catalytic Reduction of SO2 by CO on Sulfided CoMo/ Al2O3-TiO2 Catalysts

Zhang Wen-Hua;Peng Jiang-Jie;Ma Yun-Sheng;Hao Li-Qing;Zhuang Shu-Xian   

  1. Chemical Physics Department, University of Science and Technology of China, Hefei　230026
  • Received:2002-01-18 Revised:2002-04-08 Published:2002-10-15
  • Contact: Zhuang Shu-Xian E-mail:szhuang@ustc.edu.cn

PDF

3373

赞

摘要： 报导了Al2O3、Al2O3-TiO2和TiO2担载的硫化CoMo催化剂上CO催化还原SO2的规律性,结果表明，反应物分别在350 ℃、350～400 ℃间和400 ℃完全转化为CO2和元素S.在含TiO2的催化剂上,CO-SO2反应可同时按COS中间物机理和Redox机理进行,从而使尾气中COS的含量大为降低,提高了生成元素S的选择性.对反应机理进行了讨论.

关键词: CO-SO2反应, CoMo/Al2O3催化剂

Abstract: The catalytic reduction of SO2 by CO has been systematically investigated over the sulfided CoMo catalysts (4.0％CoO, 15.0％MoO3) supported on Al2O3, Al2O3-TiO2 and TiO2.The results show that CO and SO2 could be converted completely to CO2 and elemental sulfur at 350 ℃, 350～400 ℃ and 400 ℃ respectively on those catalysts mentioned above. Interestingly, two kind of mechanism, namely COS as intermediate and modified Redox mechanism, were found to perform simultaneously over the catalysts supported on TiO2 or Al2O3-TiO2 above 200 ℃,which greatly suppressed the COS production and resulted in a higher sulfur selectivity than that on the Al2O3-supported catalyst. The reaction mechanism was also discussed.

Key words: CO-SO2 reaction, Sulfided catalysts, Cobalt molybdenum catalyst, Al2O3-TiO2 mixing support, 　Synergistic effect