Kinetic study of the selective catalytic reduction of nitric oxides with hydrocarbon in diesel exhausts
(1998) In Studies in Surface Science and Catalysis 116. p.317-326- Abstract
- The kinetics of the selective catalytic reduction of nitric oxides (NOx) on a proprietary high temperature catalyst with diesel as the reductant have been studied. The objective was to derive a kinetic model that can be used for real time simulation of the catalyst. In the extension, the real time simulation will be used when controlling the injection of reductant. This is a requirement for achieving a high efficiency and a low fuel penalty. The response time and the NOx conversion level upon transient diesel injection was found to be dependent on the temperature. At temperatures below 570 K very low or no NOx conversion was observed. Above 570 K a small conversion was observed. No direct response upon diesel injection could be... (More)
- The kinetics of the selective catalytic reduction of nitric oxides (NOx) on a proprietary high temperature catalyst with diesel as the reductant have been studied. The objective was to derive a kinetic model that can be used for real time simulation of the catalyst. In the extension, the real time simulation will be used when controlling the injection of reductant. This is a requirement for achieving a high efficiency and a low fuel penalty. The response time and the NOx conversion level upon transient diesel injection was found to be dependent on the temperature. At temperatures below 570 K very low or no NOx conversion was observed. Above 570 K a small conversion was observed. No direct response upon diesel injection could be distinguished and the NOx conversion was independent on the hydrocarbon concentration. As the temperature was increased the response became apparent and then faster and the conversion level gradually became more dependent on the hydrocarbon concentration. Above 700 K the response was immediate (response time less than 15 s) and the conversion level was directly dependent on the hydrocarbon concentration. It was concluded that the NOx reduction proceeds via the formation of a hydrocarbon intermediate and the successive reaction between the hydrocarbon intermediate and NOx. When this reaction mechanism was modeled many features of the catalyst behaviour were reproduced. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3916353
- author
- Westerberg, B ; Andersson, B ; Kunkel, C and Odenbrand, Ingemar LU
- organization
- publishing date
- 1998
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Studies in Surface Science and Catalysis
- volume
- 116
- pages
- 317 - 326
- publisher
- Elsevier
- external identifiers
-
- wos:000074776800030
- scopus:37849187109
- ISSN
- 0167-2991
- DOI
- 10.1016/S0167-2991(98)80888-4
- language
- English
- LU publication?
- yes
- id
- e6244019-d8e7-46c7-be08-20bd8a228a3b (old id 3916353)
- date added to LUP
- 2016-04-01 15:57:37
- date last changed
- 2023-09-04 09:48:27
@article{e6244019-d8e7-46c7-be08-20bd8a228a3b,
abstract = {{The kinetics of the selective catalytic reduction of nitric oxides (NOx) on a proprietary high temperature catalyst with diesel as the reductant have been studied. The objective was to derive a kinetic model that can be used for real time simulation of the catalyst. In the extension, the real time simulation will be used when controlling the injection of reductant. This is a requirement for achieving a high efficiency and a low fuel penalty. The response time and the NOx conversion level upon transient diesel injection was found to be dependent on the temperature. At temperatures below 570 K very low or no NOx conversion was observed. Above 570 K a small conversion was observed. No direct response upon diesel injection could be distinguished and the NOx conversion was independent on the hydrocarbon concentration. As the temperature was increased the response became apparent and then faster and the conversion level gradually became more dependent on the hydrocarbon concentration. Above 700 K the response was immediate (response time less than 15 s) and the conversion level was directly dependent on the hydrocarbon concentration. It was concluded that the NOx reduction proceeds via the formation of a hydrocarbon intermediate and the successive reaction between the hydrocarbon intermediate and NOx. When this reaction mechanism was modeled many features of the catalyst behaviour were reproduced.}},
author = {{Westerberg, B and Andersson, B and Kunkel, C and Odenbrand, Ingemar}},
issn = {{0167-2991}},
language = {{eng}},
pages = {{317--326}},
publisher = {{Elsevier}},
series = {{Studies in Surface Science and Catalysis}},
title = {{Kinetic study of the selective catalytic reduction of nitric oxides with hydrocarbon in diesel exhausts}},
url = {{http://dx.doi.org/10.1016/S0167-2991(98)80888-4}},
doi = {{10.1016/S0167-2991(98)80888-4}},
volume = {{116}},
year = {{1998}},
}