物理化学学报 >> 2001, Vol. 17 >> Issue (02): 161-164.doi: 10.3866/PKU.WHXB20010214

研究论文 上一篇    下一篇

钴基费-托合成催化剂上CO、H2的吸附行为

陈建刚;相宏伟;董庆年;王秀芝;孙予罕   

  1. 中国科学院山西煤炭化学所,煤转化国家重点实验室,太原 030001
  • 收稿日期:2000-06-12 修回日期:2000-10-13 发布日期:2001-02-15
  • 通讯作者: 相宏伟 E-mail:hwxiang@ms.sxicc.ac.cn

H2 or CO Chemsorption on Co-based Catalysts for F-T Synthesis

Chen Jian-Gang;Xiang Hong-Wei;Dong Qing-Nian;Wang Xiu-Zhi;Sun Yu-Han   

  1. The State Key Labortory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001
  • Received:2000-06-12 Revised:2000-10-13 Published:2001-02-15
  • Contact: Xiang Hong-Wei E-mail:hwxiang@ms.sxicc.ac.cn

摘要: 采用程序升温脱附及FTIR技术考察了CO、H2在钴基催化剂上的吸附行为.H2TPD表明,Co/SiO2催化剂有两类脱附氢,引入锆助剂后,低温脱附氢量明显增加,高温吸附氢量下降.COTPD及吸附态CO的红外光谱表明锆助剂使CO在钴催化剂上的吸附强度减弱,但其吸附量增大.钴基催化剂的费托合成反应性能可以用吸附态物种的变化来解释.

关键词: 费-托合成, 钴基催化剂, 锆助剂, 表面吸附物种, 红外光谱

Abstract: Both Co/SiO2 and Co/ZrO2/SiO2 catalysts for FT synthesis were characterized by temperature programmed desorption (TPD) and FTIR spectra.H2TPD evidenced that there were two H2 desorption peaks over Co/SiO2 catalyst and that the amount of H2 adsorption decreased upon introduction of ZrO2.COTPD and COIR showed that addition of ZrO2 weakened the intensity of CO adsorption but increased the amount of adsorbed CO.In FT synthesis,ZrO2 promoter enhanced the formation of heavy hydrocarbons in addition to keeping high activity.Such a shift of product array to heavier hydrocarbon was related to the increase of surface H2/CO ratio.

Key words: F-T synthesis, Co-based catalysts, ZrO2 promoter, Surface adsorption, FT-IR spectra