典型陶瓷基体对催化滤芯中催化剂分散及脱硝活性的影响

doi:10.11949/j.issn.0438-1157.20170939

化工学报 ›› 2018, Vol. 69 ›› Issue (2): 682-689.DOI: 10.11949/j.issn.0438-1157.20170939

• 催化、动力学与反应器 • 上一篇下一篇

典型陶瓷基体对催化滤芯中催化剂分散及脱硝活性的影响

于超^1,2, 李长明², 张喻升¹, 郭凤², 余剑², 杨运泉¹, 许光文²

1 湘潭大学化工学院, 湖南湘潭 411105;
2 中国科学院过程工程研究所多相复杂系统国家重点实验室, 北京 100190

收稿日期:2017-07-24 修回日期:2017-11-08 出版日期:2018-02-05 发布日期:2018-02-05
通讯作者: 余剑
基金资助:
中国科学院STS计划项目（KFJ-SW-STS-149）；政府间国际创新合作项目（2016YFE0128300）；国家自然科学基金项目（21601192）；国家重点研发计划项目（2017YFB0310400）。

Effect of ceramic matrices on dispersion of loaded catalyst and DeNO_x activity of catalytic filters

YU Chao^1,2, LI Changming², ZHANG Yusheng¹, GUO Feng², YU Jian², YANG Yunquan¹, XU Guangwen²

1 School of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China;
2 State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received:2017-07-24 Revised:2017-11-08 Online:2018-02-05 Published:2018-02-05
Supported by:
supported by the Chinese Academy of Sciences STS Program (KFJ-SW-STS-149), the International Project on Innovative Cooperation between Governments (2016YFE0128300), the National Natural Science Foundation of China (21601192) and the National Key Research and Development Program of China (2017YFB0310400).

摘要/Abstract

摘要：

具有脱硝除尘一体化功能的催化滤芯在小型燃烧烟气处理中具有广泛的应用前景。采用3种典型商用陶瓷滤芯，涂覆V₂O₅-WO₃-MoO₃/TiO₂脱硝催化剂，制备了具有脱硝除尘一体化功能的催化滤芯材料，考察了陶瓷滤芯的化学成分和孔径结构对NH₃-SCR脱硝性能的影响。XRD、XRF、SEM、压汞等分析测试结果表明：碱金属与碱土金属元素含量低且孔径分布均匀的纤维状结构陶瓷滤芯，促进了催化剂分散，提升了脱硝活性，且降低了压降。催化滤芯在220～380℃、过滤面速度1 m·min^-1、NH₃/NO=1条件下脱硝率大于90%；抗水蒸气（15%，体积分数）和SO₂中毒（3×10^-2%，体积分数）测试表明催化滤芯在260～450℃温区内依然保持脱硝率大于90%，可满足催化滤芯实际工业应用要求。

关键词: 陶瓷滤芯, 选择催化还原, 脱硝除尘一体化, V₂O₅-WO₃-MoO₃/TiO₂, 抗硫

Abstract:

There is a wide application prospect for the development of a catalytic filter with simultaneous DeNO_x and de-dust function in the DeNO_x treatment of flue gas from small furnace. Three kinds of typical commercial ceramic filters were used to prepare catalytic DeNO_x filters by coating method, and their catalytic performance were investigated on different flue gas condition. The XRD, XRF, SEM and MIP results demonstrate that the ceramic filter with little alkali/alkaline earth metal and uniform pore distribution will promote the dispersion and DeNO_x activity of the catalytic particles as well as the decreased pressure drop. The NO conversion can be above 90% in the temperature range of 220-380℃ (face velocity=1 m·min^-1, NH₃/NO=1), and the NO conversion can still maintain above 90% after introduction of H₂O (15%, vol) and SO₂ (3×10^-2%, vol) in the temperature range of 260-450℃. The excellent DeNO_x performance of the catalytic filter meets well the demands of practical industrial application.

Key words: ceramic filter, SCR, DeNO_x and dedusting, V₂O₅-WO₃-MoO₃/TiO₂, SO₂ resistant

中图分类号:

TQ426.6

于超, 李长明, 张喻升, 郭凤, 余剑, 杨运泉, 许光文. 典型陶瓷基体对催化滤芯中催化剂分散及脱硝活性的影响[J]. 化工学报, 2018, 69(2): 682-689.

YU Chao, LI Changming, ZHANG Yusheng, GUO Feng, YU Jian, YANG Yunquan, XU Guangwen. Effect of ceramic matrices on dispersion of loaded catalyst and DeNO_x activity of catalytic filters[J]. CIESC Journal, 2018, 69(2): 682-689.

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典型陶瓷基体对催化滤芯中催化剂分散及脱硝活性的影响

Effect of ceramic matrices on dispersion of loaded catalyst and DeNO_x activity of catalytic filters

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典型陶瓷基体对催化滤芯中催化剂分散及脱硝活性的影响

Effect of ceramic matrices on dispersion of loaded catalyst and DeNOx activity of catalytic filters

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Effect of ceramic matrices on dispersion of loaded catalyst and DeNO_x activity of catalytic filters