Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor

A CFD model with chemical reaction kinetic and heat and mass transfer for a monolith reactor is established by COMSOL Multiphysics to investigate the influence of different operating conditions and water on denitrification efficiency for Cu-CHA. At the low temperature range, water has little effect...

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Main Authors:	Yanxia Li, Yuwen Zhu, Ning Zhang, Zhongliang Liu
Format:	Article
Language:	English
Published:	MDPI AG 2021-07-01
Series:	Catalysts
Subjects:	denitrification Cu-CHA SCR water resistant numerical study
Online Access:	https://www.mdpi.com/2073-4344/11/8/930

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record_format	Article
spelling	doaj-27cdb370de1b45498d901773f3fcf6b62021-08-26T13:36:32ZengMDPI AGCatalysts2073-43442021-07-011193093010.3390/catal11080930Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith ReactorYanxia Li0Yuwen Zhu1Ning Zhang2Zhongliang Liu3MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, University of Technology, Ping Le Yuan 100, Beijing 100124, ChinaMOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, University of Technology, Ping Le Yuan 100, Beijing 100124, ChinaMOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, University of Technology, Ping Le Yuan 100, Beijing 100124, ChinaMOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, University of Technology, Ping Le Yuan 100, Beijing 100124, ChinaA CFD model with chemical reaction kinetic and heat and mass transfer for a monolith reactor is established by COMSOL Multiphysics to investigate the influence of different operating conditions and water on denitrification efficiency for Cu-CHA. At the low temperature range, water has little effect on the denitrification efficiency over the Cu-CHA catalyst while NO conversion is increased by about 30% at the medium temperature. The concentration of O<sub>2</sub> (<i>C</i><sub>O2</sub>) has no significant effect on the performance of Cu-CHA catalyst. The best ratio of NO<sub>2</sub> to NO<sub>x</sub> in feed gases may be 1/2, which improves the denitrification efficiency and the yield of N<sub>2</sub> but it produces relatively little N<sub>2</sub>O. The optimal ammonia-nitrogen ratio is 1.1, where Cu-CHA catalyst has fairly great denitrification efficiency and low NH<sub>3</sub> leakage. Increasing inlet flow velocity and cross area of channels have negative effect on NO conversion, while longer channels and thicker substrate have the opposite effect.https://www.mdpi.com/2073-4344/11/8/930denitrificationCu-CHASCRwater resistantnumerical study
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Yanxia Li Yuwen Zhu Ning Zhang Zhongliang Liu
spellingShingle	Yanxia Li Yuwen Zhu Ning Zhang Zhongliang Liu Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor Catalysts denitrification Cu-CHA SCR water resistant numerical study
author_facet	Yanxia Li Yuwen Zhu Ning Zhang Zhongliang Liu
author_sort	Yanxia Li
title	Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor
title_short	Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor
title_full	Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor
title_fullStr	Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor
title_full_unstemmed	Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor
title_sort	simulation of denitrification of vehicle exhaust over cu-cha bazite catalyst for a monolith reactor
publisher	MDPI AG
series	Catalysts
issn	2073-4344
publishDate	2021-07-01
description	A CFD model with chemical reaction kinetic and heat and mass transfer for a monolith reactor is established by COMSOL Multiphysics to investigate the influence of different operating conditions and water on denitrification efficiency for Cu-CHA. At the low temperature range, water has little effect on the denitrification efficiency over the Cu-CHA catalyst while NO conversion is increased by about 30% at the medium temperature. The concentration of O<sub>2</sub> (<i>C</i><sub>O2</sub>) has no significant effect on the performance of Cu-CHA catalyst. The best ratio of NO<sub>2</sub> to NO<sub>x</sub> in feed gases may be 1/2, which improves the denitrification efficiency and the yield of N<sub>2</sub> but it produces relatively little N<sub>2</sub>O. The optimal ammonia-nitrogen ratio is 1.1, where Cu-CHA catalyst has fairly great denitrification efficiency and low NH<sub>3</sub> leakage. Increasing inlet flow velocity and cross area of channels have negative effect on NO conversion, while longer channels and thicker substrate have the opposite effect.
topic	denitrification Cu-CHA SCR water resistant numerical study
url	https://www.mdpi.com/2073-4344/11/8/930
work_keys_str_mv	AT yanxiali simulationofdenitrificationofvehicleexhaustovercuchabazitecatalystforamonolithreactor AT yuwenzhu simulationofdenitrificationofvehicleexhaustovercuchabazitecatalystforamonolithreactor AT ningzhang simulationofdenitrificationofvehicleexhaustovercuchabazitecatalystforamonolithreactor AT zhongliangliu simulationofdenitrificationofvehicleexhaustovercuchabazitecatalystforamonolithreactor
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Simulation of Denitrification of Vehicle Exhaust over Cu-CHA Bazite Catalyst for a Monolith Reactor

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