Numerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH3-SCR over Cu-ZSM-5

A systematic modeling approach was scrutinized to develop a kinetic model and a novel monolith channel geometry was designed for NH3 selective catalytic reduction (NH3-SCR) over Cu-ZSM-5. The redox characteristic of Cu-based catalysts and the variations...

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Autores principales:	Shiyong Yu, Jichao Zhang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	NH<sub>3</sub>-SCR diesel engine Cu-ZSM-5 NO<sub>x</sub> conversion efficiency Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/792e81a069744b88b0fe5e3d8282956d
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spelling	oai:doaj.org-article:792e81a069744b88b0fe5e3d8282956d2021-11-25T18:50:56ZNumerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH<sub>3</sub>-SCR over Cu-ZSM-510.3390/pr91119662227-9717https://doaj.org/article/792e81a069744b88b0fe5e3d8282956d2021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/1966https://doaj.org/toc/2227-9717A systematic modeling approach was scrutinized to develop a kinetic model and a novel monolith channel geometry was designed for NH<sub>3</sub> selective catalytic reduction (NH<sub>3</sub>-SCR) over Cu-ZSM-5. The redox characteristic of Cu-based catalysts and the variations of NH<sub>3</sub>, NO<sub>x</sub> concentration, and NO<sub>x</sub> conversion along the axis in porous media channels were studied. The relative pressure drop in different channels, the variations of NH<sub>3</sub> and NO<sub>x</sub> conversion efficiency were analyzed. The model mainly considers NH<sub>3</sub> adsorption and desorption, NH<sub>3</sub> oxidation, NO oxidation, and NO<sub>x</sub> reduction. The results showed that the model could accurately predict the NH<sub>3</sub>-SCR reaction. In addition, it was found that the Cu-based zeolite catalyst had poor low-temperature catalytic performance and good high-temperature activity. Moreover, the catalytic reaction of NH<sub>3</sub>-SCR was mainly concentrated in the upper part of the reactor. In addition, the hexagonal channel could effectively improve the diffusion rate of gas reactants to the catalyst wall, reduce the pressure drop and improve the catalytic conversion efficiencies of NH<sub>3</sub> and NO<sub>x</sub>.Shiyong YuJichao ZhangMDPI AGarticleNH<sub>3</sub>-SCRdiesel engineCu-ZSM-5NO<sub>x</sub> conversion efficiencyChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 1966, p 1966 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	NH<sub>3</sub>-SCR diesel engine Cu-ZSM-5 NO<sub>x</sub> conversion efficiency Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	NH<sub>3</sub>-SCR diesel engine Cu-ZSM-5 NO<sub>x</sub> conversion efficiency Chemical technology TP1-1185 Chemistry QD1-999 Shiyong Yu Jichao Zhang Numerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH<sub>3</sub>-SCR over Cu-ZSM-5
description	A systematic modeling approach was scrutinized to develop a kinetic model and a novel monolith channel geometry was designed for NH<sub>3</sub> selective catalytic reduction (NH<sub>3</sub>-SCR) over Cu-ZSM-5. The redox characteristic of Cu-based catalysts and the variations of NH<sub>3</sub>, NO<sub>x</sub> concentration, and NO<sub>x</sub> conversion along the axis in porous media channels were studied. The relative pressure drop in different channels, the variations of NH<sub>3</sub> and NO<sub>x</sub> conversion efficiency were analyzed. The model mainly considers NH<sub>3</sub> adsorption and desorption, NH<sub>3</sub> oxidation, NO oxidation, and NO<sub>x</sub> reduction. The results showed that the model could accurately predict the NH<sub>3</sub>-SCR reaction. In addition, it was found that the Cu-based zeolite catalyst had poor low-temperature catalytic performance and good high-temperature activity. Moreover, the catalytic reaction of NH<sub>3</sub>-SCR was mainly concentrated in the upper part of the reactor. In addition, the hexagonal channel could effectively improve the diffusion rate of gas reactants to the catalyst wall, reduce the pressure drop and improve the catalytic conversion efficiencies of NH<sub>3</sub> and NO<sub>x</sub>.
format	article
author	Shiyong Yu Jichao Zhang
author_facet	Shiyong Yu Jichao Zhang
author_sort	Shiyong Yu
title	Numerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH<sub>3</sub>-SCR over Cu-ZSM-5
title_short	Numerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH<sub>3</sub>-SCR over Cu-ZSM-5
title_full	Numerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH<sub>3</sub>-SCR over Cu-ZSM-5
title_fullStr	Numerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH<sub>3</sub>-SCR over Cu-ZSM-5
title_full_unstemmed	Numerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH<sub>3</sub>-SCR over Cu-ZSM-5
title_sort	numerical investigation on the intraphase and interphase mass transfer limitations for nh<sub>3</sub>-scr over cu-zsm-5
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/792e81a069744b88b0fe5e3d8282956d
work_keys_str_mv	AT shiyongyu numericalinvestigationontheintraphaseandinterphasemasstransferlimitationsfornhsub3subscrovercuzsm5 AT jichaozhang numericalinvestigationontheintraphaseandinterphasemasstransferlimitationsfornhsub3subscrovercuzsm5
_version_	1718410654152392704

Numerical Investigation on the Intraphase and Interphase Mass Transfer Limitations for NH<sub>3</sub>-SCR over Cu-ZSM-5

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