A kinetic model of the hydrogen assisted selective catalytic reduction of NO with ammonia over Ag/Al2O3

Stefanie Tamm; Louise Olsson; Sebastian Fogel; Pär Gabrielsson; Magnus Skoglundh

doi:10.1002/aic.14170

A kinetic model of the hydrogen assisted selective catalytic reduction of NO with ammonia over Ag/Al2O3

Stefanie Tamm, Louise Olsson, Sebastian Fogel, Pär Gabrielsson, Magnus Skoglundh

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A global kinetic model which describes H₂-assisted NH₃-SCR over an Ag/Al₂O₃ monolith catalyst has been developed. The intention is that the model can be applied for dosing NH₃ and H₂ to an Ag/Al₂O₃ catalyst in a real automotive application as well as contribute to an increased understanding of the reaction mechanism for NH₃-SCR. Therefore, the model needs to be simple and accurately predict the conversion of NO_x. The reduction of NO is described by a global reaction, with a molar stoichiometry between NO, NH₃ and H₂ of 1:1:2. Further reactions included in the model are the oxidation of NH₃ to N₂ and NO, oxidation of H₂, and the adsorption and desorption of NH₃. The model was fitted to the results of an NH₃-TPD experiment, an NH₃ oxidation experiment, and a series of H₂-assisted NH₃-SCR steady-state experiments. The model predicts the conversion of NO_x well even during transient experiments.

Original language	English
Journal	AIChE Journal
Volume	59
Issue number	11
Pages (from-to)	4325-4333
ISSN	0001-1541
DOIs	https://doi.org/10.1002/aic.14170
Publication status	Published - 2013

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title = "A kinetic model of the hydrogen assisted selective catalytic reduction of NO with ammonia over Ag/Al2O3",

abstract = "A global kinetic model which describes H2-assisted NH3-SCR over an Ag/Al2O3 monolith catalyst has been developed. The intention is that the model can be applied for dosing NH3 and H2 to an Ag/Al2O3 catalyst in a real automotive application as well as contribute to an increased understanding of the reaction mechanism for NH3-SCR. Therefore, the model needs to be simple and accurately predict the conversion of NOx. The reduction of NO is described by a global reaction, with a molar stoichiometry between NO, NH3 and H2 of 1:1:2. Further reactions included in the model are the oxidation of NH3 to N2 and NO, oxidation of H2, and the adsorption and desorption of NH3. The model was fitted to the results of an NH3-TPD experiment, an NH3 oxidation experiment, and a series of H2-assisted NH3-SCR steady-state experiments. The model predicts the conversion of NOx well even during transient experiments.",

author = "Stefanie Tamm and Louise Olsson and Sebastian Fogel and P{\"a}r Gabrielsson and Magnus Skoglundh",

year = "2013",

doi = "10.1002/aic.14170",

language = "English",

volume = "59",

pages = "4325--4333",

journal = "AIChE Journal",

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publisher = "JohnWiley & Sons, Inc.",

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T1 - A kinetic model of the hydrogen assisted selective catalytic reduction of NO with ammonia over Ag/Al2O3

AU - Tamm, Stefanie

AU - Olsson, Louise

AU - Fogel, Sebastian

AU - Gabrielsson, Pär

AU - Skoglundh, Magnus

PY - 2013

Y1 - 2013

N2 - A global kinetic model which describes H2-assisted NH3-SCR over an Ag/Al2O3 monolith catalyst has been developed. The intention is that the model can be applied for dosing NH3 and H2 to an Ag/Al2O3 catalyst in a real automotive application as well as contribute to an increased understanding of the reaction mechanism for NH3-SCR. Therefore, the model needs to be simple and accurately predict the conversion of NOx. The reduction of NO is described by a global reaction, with a molar stoichiometry between NO, NH3 and H2 of 1:1:2. Further reactions included in the model are the oxidation of NH3 to N2 and NO, oxidation of H2, and the adsorption and desorption of NH3. The model was fitted to the results of an NH3-TPD experiment, an NH3 oxidation experiment, and a series of H2-assisted NH3-SCR steady-state experiments. The model predicts the conversion of NOx well even during transient experiments.

AB - A global kinetic model which describes H2-assisted NH3-SCR over an Ag/Al2O3 monolith catalyst has been developed. The intention is that the model can be applied for dosing NH3 and H2 to an Ag/Al2O3 catalyst in a real automotive application as well as contribute to an increased understanding of the reaction mechanism for NH3-SCR. Therefore, the model needs to be simple and accurately predict the conversion of NOx. The reduction of NO is described by a global reaction, with a molar stoichiometry between NO, NH3 and H2 of 1:1:2. Further reactions included in the model are the oxidation of NH3 to N2 and NO, oxidation of H2, and the adsorption and desorption of NH3. The model was fitted to the results of an NH3-TPD experiment, an NH3 oxidation experiment, and a series of H2-assisted NH3-SCR steady-state experiments. The model predicts the conversion of NOx well even during transient experiments.

U2 - 10.1002/aic.14170

DO - 10.1002/aic.14170

M3 - Journal article

SN - 0001-1541

VL - 59

SP - 4325

EP - 4333

JO - AIChE Journal

JF - AIChE Journal

IS - 11

ER -

A kinetic model of the hydrogen assisted selective catalytic reduction of NO with ammonia over Ag/Al2O3

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