CoOx-CeOx/ZrO2催化氧化NO性能及抗SO2毒化研究

彭莉莉; 黄妍; 李建光; 张俊丰

CoO_x-CeO_x/ZrO₂催化氧化NO性能及抗SO₂毒化研究

湘潭大学环境科学与工程系, 湖南湘潭 411105

基金项目: 湖南省科技厅项目(2011FJ3090)。

详细信息

通讯作者:
黄妍,E-mail:xtuhy@163.com

中图分类号: X701.7
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出版历程
- 收稿日期: 2012-01-17
- 修回日期: 2012-05-04
- 刊出日期: 2012-11-30

Catalytic performance of CoO_x-CeO_x/ZrO₂ in NO oxidation and its resistance against SO₂

Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China

摘要

摘要: 采用浸渍法制备了一系列CoO_x-CeO_x/ZrO₂催化剂,探讨了催化剂载体、Co含量、Co/Ce配比等对Co基催化剂催化氧化NO活性的影响及其机理。ZrO₂负载的Co氧化物具有优良的低温NO催化氧化活性,铈的添加进一步提高了催化剂的低温活性。其促进机制主要是提高了催化剂吸附氧的能力及改善了Co在催化剂表面的分散。同时,掺杂铈使得催化剂抗SO₂能力有一定增强,呈现出选择性毒化机制。
- CoO_x-CeO_x/ZrO₂催化剂 /
- 催化氧化NO /
- 抗SO₂
Abstract: A series of CoO_x-CeO_x/ZrO₂ catalysts for NO oxidation were prepared by impregnation method and characterized by XRD, BET and H₂-TPR. The influence of the support as well as the content of cerium and cobalt on the catalytic performance of CoO_x-CeO_x/ZrO₂ in NO oxidation was investigated. The results indicated that the addition of Ce may improve the adsorption ability of the Co-based catalyst for oxygen and the dispersion of active cobalt species. Compared with CoO_x/ZrO₂ and CeO_x/ZrO₂, the CoO_x-CeO_x/ZrO₂ catalysts exhibit higher activity and better resistance against SO₂ for NO oxidation at low temperature.
- CoO_x-CeO_x/ZrO₂ /
- oxidation NO /
- SO₂ resistance

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