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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (24): 2523-2528. 上一篇    下一篇

研究论文

焙烧温度对Cu/ZnO水煤气变换催化剂开停循环性能的影响

刘晓钰，郭平均，周功兵，裴燕，乔明华*，范康年*   

  1. (上海市分子催化和功能材料重点实验室 复旦大学化学系 上海 200433)
  • 投稿日期:2010-03-23 修回日期:2010-07-16 发布日期:2010-08-16
  • 通讯作者: 刘晓钰 E-mail:082022044@fudan.edu.cn
  • 基金资助:

    “973”国家重点基础研究发展规划资助项目;教育部新世纪优秀人才支持计划资助项目;国家自然科学基金;霍英东教育基金会资助项目;上海市科委资助项目

Cu/ZnO Water-gas Shift Catalysts Calcined at Different Temperatures for Shut-down/Start-up Operation

LIU Xiao-Yu, GUO Ping-Jun, ZHOU Gong-Bing, PEI Yan, QIAO Ming-Hua, FAN Kang-Nian   

  1. (Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433)
  • Received:2010-03-23 Revised:2010-07-16 Published:2010-08-16

PDF

1250

被引次数

12

采用共沉淀法制备了Cu/Zn物质的量的比为1∶1的Cu/ZnO催化剂, 考察了不同焙烧温度对催化剂的水煤气变换反应活性和开停循环稳定性的影响. 研究发现350 ℃焙烧得到的Cu/ZnO催化剂有最高的反应活性, 在反应温度为200 ℃时, CO转化速率即可达2080 cm3•gcat－1•h－1. 在开停循环性能评价中, Cu/ZnO催化剂表现出了良好的稳定性, 明显优于CeO2负载的贵金属催化剂, 其中焙烧温度为550 ℃的Cu/ZnO催化剂在一次开停循环操作后活性有明显的提高.

关键词: 水煤气变换, Cu/ZnO催化剂, 焙烧温度, 开停循环

Cu/ZnO catalysts with a Cu/Zn molar ratio of 1∶1 were prepared by the coprecipitation method. The effect of the calcination temperature in the range of 350～550 ℃ was investigated in static state and cyclic shut-down/start-up water-gas shift (WGS) reactions. The Cu/ZnO catalyst calcined at 350 ℃ exhibited the highest activity in the static state operation, and the reaction rate in terms of CO amounted to 2080 cm3•gcat－1•h－1. In the shut-down/start-up operation, these catalysts showed better stability than CeO2-supported noble metal catalysts reported in the literature. Moreover, the CO conversion on the Cu/ZnO catalyst calcined at 550 ℃ was enhanced substantially after one shut-down/start-up cycle.

Key words: water-gas shift, Cu/ZnO catalyst, calcination temperature, shut-down/start-up cycle