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Modeling of Conversion Hysteresis Phenomena for Pt/Pd‐based Diesel Oxidation Catalysts

Dubbe, Hendrik / Eigenberger, Gerhart / Nieken, Ulrich

Recent findings in the conversion behavior of diesel oxidation catalysts (DOCs) show a strong dependence between performance and oxidation state of the catalyst. Furthermore, a slow and reversible change of catalyst oxidation state has been observed under cyclic temperature changes with realistic exhaust gas conditions, which can result in a significant inverse hysteresis during light‐off and subsequent light‐out. In this contribution, an existing 1D global kinetic model for Pt‐only DOCs is developed further, considering CO and hydrocarbon interaction. It is also applied to a Pd‐only and PtPd‐alloyed catalyst.

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Modeling of Conversion Hysteresis Phenomena for Pt/Pd‐based Diesel Oxidation Catalysts

Dubbe, Hendrik / Eigenberger, Gerhart / Nieken, Ulrich

Recent findings in the conversion behavior of diesel oxidation catalysts (DOCs) show a strong dependence between performance and oxidation state of the catalyst. Furthermore, a slow and reversible change of catalyst oxidation state has been observed under cyclic temperature changes with realistic exhaust gas conditions, which can result in a significant inverse hysteresis during light‐off and subsequent light‐out. In this contribution, an existing 1D global kinetic model for Pt‐only DOCs is developed further, considering CO and hydrocarbon interaction. It is also applied to a Pd‐only and PtPd‐alloyed catalyst.

Modeling of Conversion Hysteresis Phenomena for Pt/Pd‐based Diesel Oxidation Catalysts

Dubbe, Hendrik / Eigenberger, Gerhart / Nieken, Ulrich

Recent findings in the conversion behavior of diesel oxidation catalysts (DOCs) show a strong dependence between performance and oxidation state of the catalyst. Furthermore, a slow and reversible change of catalyst oxidation state has been observed under cyclic temperature changes with realistic exhaust gas conditions, which can result in a significant inverse hysteresis during light‐off and subsequent light‐out. In this contribution, an existing 1D global kinetic model for Pt‐only DOCs is developed further, considering CO and hydrocarbon interaction. It is also applied to a Pd‐only and PtPd‐alloyed catalyst.

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Title:

Modeling of Conversion Hysteresis Phenomena for Pt/Pd‐based Diesel Oxidation Catalysts

Contributors:

Dubbe, Hendrik (author) / Eigenberger, Gerhart (author) / Nieken, Ulrich (author)

Published in:

Chemie Ingenieur Technik ; 90 ; 625-633

Publication date:

2018-05-01

Size:

9 pages

ISSN:

0009-286X , 1522-2640

DOI:

https://doi.org/10.1002/cite.201700134

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Diesel oxidation catalysts , Catalyst deactivation , Inverse hysteresis , Reactivation , PtPd‐alloyed catalysts

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