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Citation: Liu Ying-Jun, Zhang Ji-Jun, Li Neng, Lin Bing-Xiong. The Effect of CO₂ on Catalytic Activity of Cu-Ce-O Complex Oxides for CO Oxidation[J]. Acta Physico-Chimica Sinica, ;1999, 15(02): 97-100. doi: 10.3866/PKU.WHXB19990201 shu

The Effect of CO₂ on Catalytic Activity of Cu-Ce-O Complex Oxides for CO Oxidation

1.
Institute of Physical Chemistry,Peking University,Beijing 100871

Received Date: 3 November 1998
Available Online: 15 February 1999

The effect of CO2 on catalytic activity for CO oxidation on Cu-Ce-O fluorite-type complex oxides has been investigated. CO2 played an inhibiting role in CO oxidation on the catalyst similar to what happened on CeO2. As CO2 was introduced into the feed, the coliversion of CO to CO2 on the catalyst was reduced a little. At room temperature, the catalyst could easily adsorb CO2 in large amounts from the air to form carbonate on its surface, as well as from the yields at low reaction temperature As a result, the catalyst could be poisoned by CO2 tentatively .The catalytic activity could be recovered to its initial value on being heated at 300 ℃ or higher temperature. Cu-Ce-O catalyst showed high activity with CO conversion over 98% after being pretreated to desorb CO2 previously.
- Ceria,
- CuO,
- Cu-Ce-Ocomplex oxide,
- Inhibiting effect of CO2
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The Effect of CO2 on Catalytic Activity of Cu-Ce-O Complex Oxides for CO Oxidation

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通讯作者: 陈斌, bchen63@163.com

The Effect of CO₂ on Catalytic Activity of Cu-Ce-O Complex Oxides for CO Oxidation