A Study of the Catalytic Reduction of NOx in Diesel Exhaust

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A Study of the Catalytic Reduction of NOx in Diesel Exhaust

Wilkins, A. J. J. / Hesse, D. / Neyer, D. / Jochheim, J. / Warren, J. P. / Twigg, M. V. / Duesterdiek, T. / Engeler, W.

Reduction of nitrogen oxides in Diesel exhaust gas is a challenging task. This paper reports results from an extensive study using Pt-based catalysts involving synthetic gas activity testing (SCAT), engine bench testing and tests on passenger cars. Preliminary SCAT work highlighted the importance of Pt-dispersion, and both SCAT and bench engine testing yielded comparable NOx conversions under steady state conditions at high HC:NOx ratios. On passenger cars in the European cycle without secondary fuel injection NOx conversion was lower than obtained in the steady state tests. Better conversion was obtained in the FTP cycle, where secondary injection was employed. Higher HC:NOx, ratios and more favourable temperature conditions which were present in the exhaust contributed to this higher conversion.

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Document information

Title :

A Study of the Catalytic Reduction of NOx in Diesel Exhaust

Additional title:

Sae Technical Papers

Contributors:

Wilkins, A. J. J. (author) / Hesse, D. (author) / Neyer, D. (author) / Jochheim, J. (author) / Warren, J. P. (author) / Twigg, M. V. (author) / Duesterdiek, T. (author) / Engeler, W. (author)

Conference:

1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1996

Published in:

Sae Technical Paper Series

Publication date :

1996-10-01

ISSN :

2688-3627 , 0148-7191

DOI :

https://doi.org/10.4271/962042

Type of media :

Conference paper