SO2 Tolerance of Rice Hull Ash Based Fe-Cu Catalysts for Low-Temperature CO-SCR of NO

Rice husk ash (RHA) has potential as a supporter of catalysts. In this research, we studied the activity and SO2 tolerance of RHA-based Fe-Cu oxide in the reduction of NO by CO. Characterization methods were employed to study the properties of the catalysts and their SO2 tolerance. Activity and SO2...

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Bibliographic Details
Published inCatalysts Vol. 12; no. 5; p. 534
Main Authors Teng, Zhaohui, Huang, Shan, Li, Na, Zhou, Qulan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.05.2022
Subjects
Adsorption
Ashes
Carbon monoxide
Catalysts
Catalytic activity
Chemical reactions
CO-SCR
Fe-Cu catalysts
Flue gas
Fourier transforms
Low temperature
Metal oxides
Morphology
NO reduction
rice husk ash
SO2 resistance
Sulfites
United States > US
China
Japan
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Summary:Rice husk ash (RHA) has potential as a supporter of catalysts. In this research, we studied the activity and SO2 tolerance of RHA-based Fe-Cu oxide in the reduction of NO by CO. Characterization methods were employed to study the properties of the catalysts and their SO2 tolerance. Activity and SO2 resistance were also tested at different temperatures. We recommend two catalysts with SO2 resistance ability: Fe0.67Cu0.33/RHA (the highest catalytic activity) and Fe0.8Cu0.2/RHA. The NO removal rate hardly changed with the addition of SO2 and was kept at about 100%. However, the CO conversion rate decreased with increasing SO2 at the lower reaction temperatures, which may be due to the formation of sulfites. Fortunately, the deactivation was reversible and can be reduced with an increase in the reaction temperature. The results of our research may help promote the application of CO-SCR.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal12050534