过渡金属基分子筛SCR催化剂失活机制及抗失活技术研究进展

马静;翁端;吴晓东;司知蠢

doi:10.3981/j.issn.1000-7857.2011.30.010

科技导报 >

2011 , Vol. 29 >Issue 30: 68 - 72

DOI: https://doi.org/10.3981/j.issn.1000-7857.2011.30.010

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过渡金属基分子筛SCR催化剂失活机制及抗失活技术研究进展

马静;翁端;吴晓东;司知蠢

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清华大学材料科学与工程系;先进材料教育部重点实验室,北京 100084

收稿日期: 2011-10-10

修回日期: 2011-10-21

网络出版日期: 2011-10-28

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Research Progress on Deactivation and Resistance of Transitional Metal Based Zeolite SCR Catalysts

MA Jing;WENG Duan;WU Xiaodong;SI Zhichun

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Key Laboratory for Advanced Materials of Ministry of Education, Department of Materials Science & Engineering, Tsinghua University, Beijing 100084, China

Received date: 2011-10-10

Revised date: 2011-10-21

Online published: 2011-10-28

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摘要

过渡金属基分子筛是在氨选择性催化还原氮氧化物技术领域广泛应用的一类催化材料,在实际应用中容易中毒失活。失活形式主要有水热老化失活,P、S中毒失活,HCs中毒失活及尿素中毒失活等。本文分析了过渡金属基分子筛催化剂的4种失活机制及相应的抗失活工艺,并展望了过渡金属基分子筛的发展方向。

关键词： 过渡金属基分子筛; 水热老化; 磷硫; 碳氢化合物; 尿素

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马静;翁端;吴晓东;司知蠢 . 过渡金属基分子筛SCR催化剂失活机制及抗失活技术研究进展[J]. 科技导报, 2011 , 29(30) : 68 -72 . DOI: 10.3981/j.issn.1000-7857.2011.30.010

Abstract

Transitional metal based zeolites are widely used to remove nitrogen oxides by NH₃-SCR, which will eventually become de-activated in practical application proceses, including hydrothermal aging, P and S poisoning, HCs poisoning and urea poisoning. The deactivation mechanisms and the related methods to improve the resistance to deactivation are reviewed. The development trends of the transitional metal based zeolite are outlined.

Key words： transitional metal based zeolite; hydrothermal aging; P and S; HCs; urea

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