The Effects of Sulfate Formation and Mg Addition on the Selective Catalytic Reduction of NOx with CH4 on Ag/Al2O3 Catalysts

Title
The Effects of Sulfate Formation and Mg Addition on the Selective Catalytic Reduction of NOx with CH4 on Ag/Al2O3 Catalysts
Authors
최희락유창용하헌필
Keywords
Ag/Al2O3; Sulfur poisoning; DeNOx; Selective catalytic reduction; Mg sulfate
Issue Date
2011-05
Publisher
한국분말야금학회지; Journal of Korean Powder Metallurgy Institute
Citation
VOL 18, NO 2, 159-167
Abstract
The influence of sulfate on the selective catalytic reduction of NOx on the Ag/Al2O3 catalyst was studied when CH4 was used as a reducing agent. Various preparation methods influenced differently on the deNOx activity. Among the methods, cogelation precipitation gave best activity. When sulfates were formed on the surfaces of samples prepared by impregnated and deposition precipitation, deNOx activity was enhanced as long as suitable forming condition is satisfied. The major sulfate formed in Ag/Al2O3 catalyst was the aluminum sulfate and it seems that this sulfate acted as a promoter. When Mg was added to the Ag/Al2O3 catalyst it promoted deNOx activity at high temperature. Intentionally added sulfate also enhanced deNOx activity, when their amount was confined less than 3 wt%.
URI
http://pubs.kist.re.kr/handle/201004/39809
ISSN
1225-7591
Appears in Collections:
KIST Publication > Article
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