Sustained concentration and temperature oscillations in a diesel oxidation catalyst

Sustained concentration and temperature oscillations in a diesel oxidation catalyst Chemical Engineering Journal 336 (2018) 531–543 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage: www.elsevier.com/locate/cej Sustained concentration and temperature oscillations in a diesel oxidation catalyst ⁎ ⁎ Po-Yu Peng, Michael P. Harold , Dan Luss Department of Chemical & Biomolecular Engineering, University of Houston, Houston 77204-4004, United States GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: A diesel oxidation catalyst (DOC) comprising an alumina-based washcoat of Platinum (Pt) and Palladium (Pd) is Hydrocarbon trap used to catalyze the oxidation of a diesel exhaust containing hydrocarbons (HCs) with sufficiently high con- Beta-zeolite version. A large-pore zeolite such as Beta (BEA) is added to the DOC to trap diesel exhaust hydrocarbons during Diesel oxidation catalyst the cold start. There is a need to gain insight on how BEA affects the performance of the HC light-off and of the Oscillations transient HC oxidation. We conducted steady-state and transient trapping experiments involving the n-dodecane Dodecane in order to enable improved trap design and operating strategy. Simultaneous spatio-temporal measurements of Oxidation concentration and temperature, respectively by spatially-resolved mass spectrometry and coherent optical fre- Platinum quency domain reflectometer, provide detailed insight into the reactor dynamics. Steady-state experiments re- veal unexpected periodic oscillations http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chemical Engineering Journal Elsevier

Sustained concentration and temperature oscillations in a diesel oxidation catalyst

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
1385-8947
eISSN
1873-3212
D.O.I.
10.1016/j.cej.2017.12.023
Publisher site
See Article on Publisher Site

Abstract

Chemical Engineering Journal 336 (2018) 531–543 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage: www.elsevier.com/locate/cej Sustained concentration and temperature oscillations in a diesel oxidation catalyst ⁎ ⁎ Po-Yu Peng, Michael P. Harold , Dan Luss Department of Chemical & Biomolecular Engineering, University of Houston, Houston 77204-4004, United States GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: A diesel oxidation catalyst (DOC) comprising an alumina-based washcoat of Platinum (Pt) and Palladium (Pd) is Hydrocarbon trap used to catalyze the oxidation of a diesel exhaust containing hydrocarbons (HCs) with sufficiently high con- Beta-zeolite version. A large-pore zeolite such as Beta (BEA) is added to the DOC to trap diesel exhaust hydrocarbons during Diesel oxidation catalyst the cold start. There is a need to gain insight on how BEA affects the performance of the HC light-off and of the Oscillations transient HC oxidation. We conducted steady-state and transient trapping experiments involving the n-dodecane Dodecane in order to enable improved trap design and operating strategy. Simultaneous spatio-temporal measurements of Oxidation concentration and temperature, respectively by spatially-resolved mass spectrometry and coherent optical fre- Platinum quency domain reflectometer, provide detailed insight into the reactor dynamics. Steady-state experiments re- veal unexpected periodic oscillations

Journal

Chemical Engineering JournalElsevier

Published: Mar 15, 2018

References

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