The Effect of an Oxidation Precatalyst on the NOx Reduction by Ammonia SCR
Publication type: Journal Article
Publication date: 2002-06-28
scimago Q1
wos Q2
SJR: 0.828
CiteScore: 6.7
Impact factor: 3.9
ISSN: 08885885, 15205045
General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering
Abstract
The performances of oxidation and SCR catalysts were investigated individually and as a combined system for the removal of NOx by ammonia. Experiments were carried out with synthetic gas mixtures matching the composition of diesel exhaust. Introducing an oxidation catalyst upstream of the SCR catalyst enhances the removal of NOx at low temperatures. The beneficial effects of combining the two catalysts are the oxidation of unburned hydrocarbons that inhibit the SCR reaction and the conversion of NO to NO2 on the oxidation catalyst. NO2 fractions up to 50% of total NOx enhance the NOx conversion at temperatures below 300 °C. However, excess NO2 should be avoided because the reaction of NO2 with ammonia is slow, resulting in a decreased NOx conversion. Above 350 °C, the NOx conversion essentially does not depend on the ratio NO2/NOx or on the presence of hydrocarbons in the feed. A simple mathematical prediction of the NOx conversion for the combined system is also possible. The parameters used in this calc...
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124
Total citations:
124
Citations from 2025:
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(3.23%)
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GOST
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Madia G. et al. The Effect of an Oxidation Precatalyst on the NOx Reduction by Ammonia SCR // Industrial & Engineering Chemistry Research. 2002. Vol. 41. No. 15. pp. 3512-3517.
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Madia G., Koebel M., Elsener M., Wokaun A. The Effect of an Oxidation Precatalyst on the NOx Reduction by Ammonia SCR // Industrial & Engineering Chemistry Research. 2002. Vol. 41. No. 15. pp. 3512-3517.
Cite this
RIS
Copy
TY - JOUR
DO - 10.1021/ie0200555
UR - https://doi.org/10.1021/ie0200555
TI - The Effect of an Oxidation Precatalyst on the NOx Reduction by Ammonia SCR
T2 - Industrial & Engineering Chemistry Research
AU - Madia, Giuseppe
AU - Koebel, Manfred
AU - Elsener, Martin
AU - Wokaun, Alexander
PY - 2002
DA - 2002/06/28
PB - American Chemical Society (ACS)
SP - 3512-3517
IS - 15
VL - 41
SN - 0888-5885
SN - 1520-5045
ER -
Cite this
BibTex (up to 50 authors)
Copy
@article{2002_Madia,
author = {Giuseppe Madia and Manfred Koebel and Martin Elsener and Alexander Wokaun},
title = {The Effect of an Oxidation Precatalyst on the NOx Reduction by Ammonia SCR},
journal = {Industrial & Engineering Chemistry Research},
year = {2002},
volume = {41},
publisher = {American Chemical Society (ACS)},
month = {jun},
url = {https://doi.org/10.1021/ie0200555},
number = {15},
pages = {3512--3517},
doi = {10.1021/ie0200555}
}
Cite this
MLA
Copy
Madia, Giuseppe, et al. “The Effect of an Oxidation Precatalyst on the NOx Reduction by Ammonia SCR.” Industrial & Engineering Chemistry Research, vol. 41, no. 15, Jun. 2002, pp. 3512-3517. https://doi.org/10.1021/ie0200555.