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›› 2011, Vol. 11 ›› Issue (1): 148-152.

• 材料工程专栏 • 上一篇    下一篇

低负载贵金属催化剂对二甲醚催化燃烧的催化活性

王圆媛 徐航 冯冬梅 王金福   

  1. 清华大学化工系反应工程实验室 清华大学化工系 清华大学化工系 清华大学化工系
  • 收稿日期:2010-11-12 修回日期:2011-01-19 出版日期:2011-02-20 发布日期:2011-02-20
  • 通讯作者: 王金福

Catalytic Activity of Low-loading Pd and Pt Supported Catalysts for Combustion of Dimethyl Ether

WANG Yuan-yuan XU Hang FENG Dong-mei WANG Jin-fu   

  1. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University Department of Chemical Engineering Tsinghua University Department of Chemical Engineering Tsinghua University Department of Chemical Engineering, Tsinghua University
  • Received:2010-11-12 Revised:2011-01-19 Online:2011-02-20 Published:2011-02-20
  • Contact: WANG Jin-fu

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被引次数

12

摘要： 采用浸渍法以g-Al2O3为载体制备了多种低负载量的Pd和Pt催化剂，在微型固定床反应器装置上进行了二甲醚(DME)催化燃烧实验. 考察了不同贵金属负载量的Pd/g-Al2O3和Pt/g-Al2O3催化剂的活性，及浸渍顺序对Pd-Pt/g-Al2O3双金属负载催化剂活性的影响，并测试了贵金属负载摩尔比不同的双金属负载催化剂的活性. Pt负载量0.025%(w)的催化剂在190℃将DME完全燃烧；Pd和Pt共同负载的催化剂[Pd:Pt=2:1(mol), Pt 0.025%(w), Pd 0.027%(w), Pt先负载]性能更好，在175℃将DME完全燃烧；200 h实验后2种催化剂活性降低均小于5%.

关键词: 二甲醚, 催化燃烧, 贵金属, 负载型催化剂

Abstract: In order to select desirable catalysts for combustion of dimethyl ether (DME), a series of low-loading Pd and Pt catalysts were prepared by impregnation on g-Al2O3. The effects of loading amount and sequence of the metals on catalytic performance were investigated, and the effect of loading molar ratio of the metals. Using 0.025%(w) Pt-loaded catalyst, DME was completely converted to CO2 and H2O at 190℃. The catalyst with Pd and Pt loaded together [Pd:Pt=2:1(mol), Pt 0.025%(w), Pd 0.027%(w), Pt first-loaded] had better performance, by which DME was completely converted at 175℃. Catalytic activity of these two catalysts was decreased by less than 5% after 200 h reaction.

Key words: dimethyl ether, catalytic combustion, noble metal, supported catalysts

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