物理化学学报 >> 2011, Vol. 27 >> Issue (03): 705-710.doi: 10.3866/PKU.WHXB20110311

催化和表面科学 上一篇    下一篇

载体对Pd-Cu/活性炭催化剂在消除卷烟主流烟气中CO活性的影响

詹望成1, 周国俊2, 储国海2, 沈凯2, 俞俊1, 王爱勇1, 苏娜1, 卢冠忠1, 郭杨龙1   

  1. 1. 结构可控先进功能材料及其制备教育部重点实验室, 华东理工大学工业催化研究所, 上海 200237;
    2. 浙江中烟工业有限责任公司技术中心, 杭州 310008
  • 收稿日期:2010-10-13 修回日期:2010-11-26 发布日期:2011-03-03
  • 通讯作者: 郭杨龙 E-mail:ylguo@ecust.edu.cn
  • 基金资助:

    国家重点基础研究重大项目计划(973)(2010CB732300)和上海市自然科学基金(09ZR1408200)资助

Effect of Supports on the Catalytic Performance of Pd-Cu/Activated Carbon Catalyst for Eliminating CO in Cigarette Smoke

ZHAN Wang-Cheng1, ZHOU Guo-Jun2, CHU Guo-Hai2, SHEN Kai2, YU Jun1, WANG Ai-Yong1, SU Na1, LU Guan-Zhong1, GUO Yang-Long1   

  1. 1. Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, P. R. China;
    2. Technology Center, China Tobacco of Zhejiang Industrial Company, Hangzhou 310008, P. R. China
  • Received:2010-10-13 Revised:2010-11-26 Published:2011-03-03
  • Contact: GUO Yang-Long E-mail:ylguo@ecust.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2010CB732300) and Science and Technology Commission of Shanghai Municipality, China (09ZR1408200).

摘要:

采用等体积浸渍法制备了Pd-Cu/活性炭催化剂, 用脉冲反应考察了催化剂对模拟卷烟主流烟气(4.4 CO-4.2 H2O-19.2 O2-72.2 He)(体积分数, %)中CO的常温催化氧化性能, 系统研究了不同的活性炭载体对催化剂的CO常温氧化活性的影响. 研究表明, 在室温条件下, 催化剂对CO氧化反应的活性顺序为: 椰壳活性炭为载体的催化剂(CAC)<木质活性炭为载体的催化剂(WAC)<超级活性炭为载体的催化剂(SAC), 并且活性炭载体对催化剂的反应诱导期也存在显著的影响. 对催化剂的表征结果表明, 不同活性炭载体表面上含氧官能团含量不同, 影响催化剂表面Pd和Cu的存在状态, 使得SAC催化剂上的Pd只以Pd2+形式存在, 而CAC和WAC催化剂上的Pd以Pd2+和Pd0形式存在, 导致SAC催化剂比CAC和WAC两种催化剂具有更好的CO催化氧化活性. 使用催化剂接装的三段式复合滤嘴试验卷烟, 与对照卷烟相比, 卷烟主流烟气中CO的释放量都有所降低, 其中添加SAC催化剂的效果最为明显. 如果将Pd的负载量增加为3.4% (w), SAC催化剂对卷烟主流烟气中CO的去除率高达25.4%.

关键词: 卷烟烟气, 一氧化碳, 常温催化氧化, 活性炭

Abstract:

Pd-Cu/activated carbon catalysts were prepared by wetness impregnation and their performance in the room-temperature catalytic oxidation of the pulse reaction of carbon monoxide were investigated using simulated cigarette smoke gas consisting of 4.4 CO-4.2 H2O-19.2 O2-72.2 He (volume fraction, %). The effect of different activated carbon supports on catalytic performance was investigated in detail. The results show that at room temperature the order of catalytic performance for CO oxidation is: the catalyst supported on coconut activated carbon (CAC)2+ and Pd0 are also present on the surfaces of the CAC and WAC catalysts but only Pd2+ is present on the surface of the SAC catalysts, which results in better catalytic activity for SAC than that of the CAC and WAC catalysts. When the ternary composite filter was prepared by inserting the catalyst between the cigarette filter and the acetate filter rod, the smoking tests showed that the amount of CO in the main cigarette smoke decreased noticeably. The SAC catalyst reduced CO by 25.4% when the amount of Pd in the catalyst increased to 3.4% (w).

Key words: Cigarette smoke, Carbon monoxide, Room-temperature catalytic oxidation, Activated carbon

MSC2000: 

  • O643