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Ammonia Concentration Distribution Measurements on Selective Catalytic Reduction Catalysts

BOSMAL Automotive Research & Development Institute Ltd., 43-300 Bielsko-Biala, Poland
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Catalysts 2018, 8(6), 231; https://doi.org/10.3390/catal8060231
Received: 18 April 2018 / Revised: 16 May 2018 / Accepted: 22 May 2018 / Published: 1 June 2018
(This article belongs to the Special Issue Selective Catalytic Reduction of NOx)
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Abstract

This work presents the methodology and accurate evaluation of ammonia concentration distribution measurements at the selective catalytic reduction (SCR) catalyst outlet cross-section. The uniformity of ammonia concentration is a crucial factor influencing overall SCR effectiveness, and it contributes to the necessity of employing a reliable test method. The aftertreatment system design (mainly its geometrical features) can be evaluated in detail. The ammonia concentration is measured at the SCR catalyst outlet at grid points covering from the center to the outer edges of the catalyst. Its execution requires the introduction of a probe hovering over the back face of the SCR. To obtain the expected accuracy, it is necessary to measure a sufficient number of points in a reasonable timeframe. In order to achieve that, a fully automatic sampling device was developed. Sample results are presented showing the capabilities of the created test stand and its importance for the design development and validation stages of SCR-based engine aftertreatment. View Full-Text
Keywords: ammonia distribution; ammonia uniformity index; selective catalytic reduction; urea; automated measurement ammonia distribution; ammonia uniformity index; selective catalytic reduction; urea; automated measurement
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sala, R.; Dzida, J.; Krasowski, J. Ammonia Concentration Distribution Measurements on Selective Catalytic Reduction Catalysts. Catalysts 2018, 8, 231.

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