NH3选择性还原NOx技术在重型柴油车尾气净化中的应用

doi:10.1016/S1872-2067(14)60048-6

催化学报 ›› 2014, Vol. 35 ›› Issue (9): 1438-1445.DOI: 10.1016/S1872-2067(14)60048-6

NH₃选择性还原NO_x技术在重型柴油车尾气净化中的应用

刘福东^a, 单文坡^a, 潘大伟^b, 李腾英^b, 贺泓^a

a 中国科学院生态环境研究中心, 北京100085;
b 中国重汽集团济南橡塑件有限公司, 山东济南250031

收稿日期:2013-12-30 修回日期:2014-01-26 出版日期:2014-08-19 发布日期:2014-08-22
通讯作者: 贺泓
基金资助:
国家高技术研究发展计划（863计划，2013AA065301）；国家自然科学基金（51108446，51278486）.

Selective catalytic reduction of NO_x by NH₃ for heavy-duty diesel vehicles

Fudong Liu^a, Wenpo Shan^a, Dawei Pan^b, Tengying Li^b, Hong He^a

a Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
b China National Heavy Duty Truck Group Jinan Rubber and Plastic Co., Ltd., Jinan 250031, Shandong, China

Received:2013-12-30 Revised:2014-01-26 Online:2014-08-19 Published:2014-08-22
Supported by:
This work was supported by the National High Technology Research and Development Program of China (863 Program, 2013AA065301) and the National Natural Science Foundation of China (51108446, 51278486).

摘要/Abstract

摘要：

基于实验室对柴油车用V₂O₅-WO₃/TiO₂催化剂配方以及涂覆成型技术的大量研究，设计了一条产量为6000只/月的NH₃选择性催化还原NO_x （NH₃-SCR）催化剂中试生产线，并对生产的催化剂产品进行了发动机台架测试. 结果表明，实验室制备的V₂O₅-WO₃/TiO₂粉体催化剂和生产线产品，在空速为50000 h^-1和200-450 ℃条件下NO_x转化率均可达80%以上；采用大尺寸堇青石载体涂覆后制备的V₂O₅-WO₃/TiO₂整体催化剂经实验室小样测试，在空速为10000-30000 h^-1和250-450 ℃条件下NO_x转化率也为80%以上. 发动机台架测试结果表明，该催化剂产品可使重型柴油机NO_x排放达到国IV标准中欧洲稳态循环（ESC）和欧洲瞬态循环（ETC）排放限值的要求. 该生产线经适当调整后也可用于生产非钒基NH₃-SCR整体催化剂，以满足未来钒基NH₃-SCR催化剂更新换代的需求.

关键词: 柴油车尾气, 氮氧化物, 选择性催化还原, 钒基催化剂, 工业化生产

Abstract:

A catalyst production line with a production capacity of 6000 catalyst monoliths per month for the selective catalytic reduction of NO_x by NH₃(NH₃-SCR) for NO_x abatement in diesel vehicle exhaust was set up based on a detailed laboratory study of the catalyst formulation and washcoating technology for V₂O₅-WO₃/TiO₂ catalyst. The catalyst produced by this line was tested on a bench scale diesel engine. The V₂O₅-WO₃/TiO₂ powder catalyst prepared in the laboratory and production line both achieved >80% NO_x conversion at 200-450 ℃ and a GHSV of 50000 h^-1. The washcoated catalyst used a large cordierite support and gave >80% NO_x conversion at 250-450 ℃ and GHSVs of 10000-30000 h^-1. The engine bench tests showed that after treatment by the catalyst, the NO_x emission met the European steady-state cycle (ESC) and European transient cycle (ETC) limits of the China IV standard. The production line can also be used for the production of vanadium-free NH₃-SCR catalysts to meet the required replacement of the present vanadium-based NH₃-SCR catalyst in the future.

Key words: Diesel exhaust, Nitrogen oxide, Selective catalytic reduction, Vanadium-based catalyst, Industrial production

刘福东, 单文坡, 潘大伟, 李腾英, 贺泓. NH₃选择性还原NO_x技术在重型柴油车尾气净化中的应用[J]. 催化学报, 2014, 35(9): 1438-1445.

Fudong Liu, Wenpo Shan, Dawei Pan, Tengying Li, Hong He. Selective catalytic reduction of NO_x by NH₃ for heavy-duty diesel vehicles[J]. Chinese Journal of Catalysis, 2014, 35(9): 1438-1445.

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NH₃选择性还原NO_x技术在重型柴油车尾气净化中的应用

Selective catalytic reduction of NO_x by NH₃ for heavy-duty diesel vehicles

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