NH3-SCR by monolithic Cu-ZSM-5 and Cu-AFX catalysts: Kinetic modeling and engine bench tests

Gen Shibata; Wataru Eijima; Ryutaro Koiwai; Ken ichi Shimizu; Yuta Nakasaka; Yoshimitsu Kobashi; Yoshihiro Kubota; Masaru Ogura; Jin Kusaka

doi:10.1016/j.cattod.2018.06.023

NH₃-SCR by monolithic Cu-ZSM-5 and Cu-AFX catalysts: Kinetic modeling and engine bench tests

Gen Shibata^*, Wataru Eijima, Ryutaro Koiwai, Ken ichi Shimizu, Yuta Nakasaka, Yoshimitsu Kobashi, Yoshihiro Kubota, Masaru Ogura, Jin Kusaka

^*Corresponding author for this work

Graduate School of Environment and Energy Engineering

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

A simple kinetic model for the standard NH₃-SCR reaction by Cu-ZSM-5 catalysts has been developed by assuming three reaction steps: NH₃ adsorption (desorption), reactions of adsorbed NH₃ with O₂ (NH₃ oxidation) and NO (NH₃-SCR). The model is based on Arrhenius parameters for NH₃-SCR and NH₃ oxidation by a powder catalyst, combined with models for heat and mass transport and parameters of monolithic catalysts. The model is validated with the experimental results, not included in the estimation of the model, for NH₃-SCR by monolithic catalysts with different parameters (catalyst loading and cell density). NOx removal from diesel exhaust, generated by engine bench, was also carried out by using monolithic Cu-ZSM-5 and Cu-AFX catalysts. The results suggest the poisoning effect of hydrocarbons in the exhaust emissions on NOx conversion is more significant for Cu-ZSM-5 than Cu-AFX.

Original language	English
Pages (from-to)	59-63
Number of pages	5
Journal	Catalysis Today
DOIs	https://doi.org/10.1016/j.cattod.2018.06.023
Publication status	Published - 2019 Jul 15

Keywords

Cu-ZSM-5
Engine bench
Heat-transfer
Kinetic modeling
Mass-transfer
NH-SCR

ASJC Scopus subject areas

Catalysis
Chemistry(all)

Access to Document

10.1016/j.cattod.2018.06.023

Cite this

@article{c2660c4fe71f4b16ac291e1b5a22e7e0,

title = "NH3-SCR by monolithic Cu-ZSM-5 and Cu-AFX catalysts: Kinetic modeling and engine bench tests",

abstract = "A simple kinetic model for the standard NH3-SCR reaction by Cu-ZSM-5 catalysts has been developed by assuming three reaction steps: NH3 adsorption (desorption), reactions of adsorbed NH3 with O2 (NH3 oxidation) and NO (NH3-SCR). The model is based on Arrhenius parameters for NH3-SCR and NH3 oxidation by a powder catalyst, combined with models for heat and mass transport and parameters of monolithic catalysts. The model is validated with the experimental results, not included in the estimation of the model, for NH3-SCR by monolithic catalysts with different parameters (catalyst loading and cell density). NOx removal from diesel exhaust, generated by engine bench, was also carried out by using monolithic Cu-ZSM-5 and Cu-AFX catalysts. The results suggest the poisoning effect of hydrocarbons in the exhaust emissions on NOx conversion is more significant for Cu-ZSM-5 than Cu-AFX.",

keywords = "Cu-ZSM-5, Engine bench, Heat-transfer, Kinetic modeling, Mass-transfer, NH-SCR",

author = "Gen Shibata and Wataru Eijima and Ryutaro Koiwai and Shimizu, {Ken ichi} and Yuta Nakasaka and Yoshimitsu Kobashi and Yoshihiro Kubota and Masaru Ogura and Jin Kusaka",

note = "Funding Information: This research is one of the projects promoted by the Research association of Automotive Internal Combustion Engines (AICE) and financially supported by Japan Ministry of Economy, Trade and Industry and auto industries. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

month = jul,

day = "15",

doi = "10.1016/j.cattod.2018.06.023",

language = "English",

pages = "59--63",

journal = "Catalysis Today",

issn = "0920-5861",

publisher = "Elsevier",

}

TY - JOUR

T1 - NH3-SCR by monolithic Cu-ZSM-5 and Cu-AFX catalysts

T2 - Kinetic modeling and engine bench tests

AU - Shibata, Gen

AU - Eijima, Wataru

AU - Koiwai, Ryutaro

AU - Shimizu, Ken ichi

AU - Nakasaka, Yuta

AU - Kobashi, Yoshimitsu

AU - Kubota, Yoshihiro

AU - Ogura, Masaru

AU - Kusaka, Jin

N1 - Funding Information: This research is one of the projects promoted by the Research association of Automotive Internal Combustion Engines (AICE) and financially supported by Japan Ministry of Economy, Trade and Industry and auto industries. Publisher Copyright: © 2018 Elsevier B.V.

PY - 2019/7/15

Y1 - 2019/7/15

N2 - A simple kinetic model for the standard NH3-SCR reaction by Cu-ZSM-5 catalysts has been developed by assuming three reaction steps: NH3 adsorption (desorption), reactions of adsorbed NH3 with O2 (NH3 oxidation) and NO (NH3-SCR). The model is based on Arrhenius parameters for NH3-SCR and NH3 oxidation by a powder catalyst, combined with models for heat and mass transport and parameters of monolithic catalysts. The model is validated with the experimental results, not included in the estimation of the model, for NH3-SCR by monolithic catalysts with different parameters (catalyst loading and cell density). NOx removal from diesel exhaust, generated by engine bench, was also carried out by using monolithic Cu-ZSM-5 and Cu-AFX catalysts. The results suggest the poisoning effect of hydrocarbons in the exhaust emissions on NOx conversion is more significant for Cu-ZSM-5 than Cu-AFX.

AB - A simple kinetic model for the standard NH3-SCR reaction by Cu-ZSM-5 catalysts has been developed by assuming three reaction steps: NH3 adsorption (desorption), reactions of adsorbed NH3 with O2 (NH3 oxidation) and NO (NH3-SCR). The model is based on Arrhenius parameters for NH3-SCR and NH3 oxidation by a powder catalyst, combined with models for heat and mass transport and parameters of monolithic catalysts. The model is validated with the experimental results, not included in the estimation of the model, for NH3-SCR by monolithic catalysts with different parameters (catalyst loading and cell density). NOx removal from diesel exhaust, generated by engine bench, was also carried out by using monolithic Cu-ZSM-5 and Cu-AFX catalysts. The results suggest the poisoning effect of hydrocarbons in the exhaust emissions on NOx conversion is more significant for Cu-ZSM-5 than Cu-AFX.

KW - Cu-ZSM-5

KW - Engine bench

KW - Heat-transfer

KW - Kinetic modeling

KW - Mass-transfer

KW - NH-SCR

UR - http://www.scopus.com/inward/record.url?scp=85049340170&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85049340170&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2018.06.023

DO - 10.1016/j.cattod.2018.06.023

M3 - Article

AN - SCOPUS:85049340170

SN - 0920-5861

SP - 59

EP - 63

JO - Catalysis Today

JF - Catalysis Today

ER -