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

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,,

1.
a Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

Corresponding author: Hong He,
Received Date: 30 December 2013
Available Online: 26 January 2014
Fund Project:

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.
- Diesel exhaust,
- Nitrogen oxide,
- Selective catalytic reduction,
- Vanadium-based catalyst,
- Industrial production
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Selective catalytic reduction of NO_x by NH₃ for heavy-duty diesel vehicles