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International Journal of Automotive Technology > Volume 25(1); 2024 > Article
International Journal of Automotive Technology 2024;25(1): 161-172.
doi: https://doi.org/10.1007/s12239-024-00006-w
Simultaneous Reduction of NOX and CO Harmful Gases According to the Promoters and Support Types of H2-SCR Catalyst
Choong-kil Seo
Department of Automotive & Mechanical Engineering , Howon University
PDF Links Corresponding Author.  Choong-kil Seo  , Email. kseo@howon.ac.kr
ABSTRACT
The purpose of this study is to simultaneously reduce NO X and CO harmful gases according to the promoters and support types of the H 2 -SCR. The 0.5Pt-2CeO 2 -5Ru/TiO 2 catalyst loaded with 7 wt% Ru showed a lower NO X conversion rate compared to than the 0.5Pt-2CeO 2 /TiO 2 (STD), but the window shifted to the right, and it showed NO X reduction performance of up to 30% at 175 °C. When Zr was loaded, de- NO X performance was not improved at the temperature of 200 °C starting from a low catalyst temperature of 75 °C. With in the infl uence of the support types, the 0.5Pt-2CeO 2 /TiO 2 H 2 -SCR catalyst showed the highest NO X conversion rate below 125 °C, and the low-temperature activity of NO X was higher than that of the three zeolite-loaded H 2 -SCR catalysts. Low temperature activity was improved because the TiO 2 has excellent reducing and oxidizing ability. Among the three zeolites, the CO reduction performance of the 0.5Pt-2CeO 2 /Zeolite (1) catalyst with high Al content was the lowest.
Key Words: Catalyst · Nitrogen oxide · Selective catalytic reduction · Carbon monoxide · Ru · Zr
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