富氧条件下Co/MOR 催化剂上甲烷选择催化还原NO

王虹; 李滨; 卢学斌; 李翠清; 丁福臣; 宋永吉

富氧条件下Co/MOR 催化剂上甲烷选择催化还原NO

1.
北京石油化工学院化学工程学院, 北京 102617;
2.
中海油天津化工研究设计院, 天津 300131;
3.
中国寰球工程公司辽宁分公司, 辽宁抚顺 113006

基金项目: National Natural Science Foundation of China (21342009); State Key Laboratory of Heavy Oil Processing(SKLHOP201501); Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality (PHR20110517).

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中图分类号: TQ426
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出版历程
- 收稿日期: 2015-05-12
- 修回日期: 2015-07-08
- 刊出日期: 2015-09-30

Selective catalytic reduction of NO by methane over the Co/MOR catalysts in the presence of oxygen

1.
Department Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;
2.
CNOOC Tianjin Research and Design Institute of Chemical Industry, Tianjin 300131, China;
3.
China Huanqiu Contracting & Engineering Company Liaoning Branch, Fushun 113006, China

Funds: National Natural Science Foundation of China (21342009); State Key Laboratory of Heavy Oil Processing(SKLHOP201501); Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality (PHR20110517).

摘要

摘要: 采用浸渍法制备了一系列用于甲烷选择催化还原(CH₄-SCR)氮氧化物的Co/MOR催化剂。采用XRD、BET、TG-MS、H₂-TPR、NH₃-TPD和NO-TPD等手段对催化剂进行表征,并对其在甲烷选择催化还原氮氧化物反应中的活性进行评价。结果表明,钴物种以Co₃O₄尖晶石形态存在于Co/MOR催化剂中;与MOR载体相比,引入钴物种后,催化剂的酸性、氧化还原能力和对NO的吸脱附能力均发生了变化。在甲烷选择催化还原氮氧化物反应中,Co/MOR的催化活性与其氧化还原性能和对NO的吸脱附性能直接相关;其中,Co负载量为10%的Co(10)/MOR催化剂的CH₄-SCR脱硝活性最好,在330℃下NO的转化率达54.2%。
- 氮氧化物 /
- 甲烷 /
- 选择性催化还原 /
- 钴氧化物 /
- 丝光沸石
Abstract: A series of Co/MOR catalysts were prepared by impregnation method and used in the selective catalytic reduction of nitric oxide with methane (CH₄-SCR). These catalysts were characterized by XRD, BET, TG-MS, H₂-TPR, NH₃-TPD and NO-TPD; their performance in the CH₄-SCR of NO was investigated. The results showed that cobalt species exist as Co₃O₄ spinal in the Co/MOR catalysts; the acidity and redox and NO absorption/desorption ability of the Co/MOR catalysts are changed after the incorporation of cobalt in MOR zeolite, in comparison with pure MOR zeolite. The catalytic performance of Co/MOR is closely related to its redox and NO adsorption/desorption ability, which are dependent on the cobalt loading. The Co(10)/MOR catalyst with a cobalt loading of 10% exhibits high activity in the CH₄-SCR of NO; over it the conversion of nitric oxide reaches 54.2% at 330 ℃.
- nitric oxide /
- methane /
- selective catalytic reduction /
- cobalt oxide /
- mordenite

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参考文献(29)

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