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The Effect of SO.sub.2 and Ca Co-pretreatment on the Catalytic Activity of Mn-Ce/TiO.sub.2 Catalysts for Selective Catalytic Reduction of NO with NH.sub.3
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The Effect of SO.sub.2 and Ca Co-pretreatment on the Catalytic Activity of Mn-Ce/TiO.sub.2 Catalysts for Selective Catalytic Reduction of NO with NH.sub.3
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The Effect of SO.sub.2 and Ca Co-pretreatment on the Catalytic Activity of Mn-Ce/TiO.sub.2 Catalysts for Selective Catalytic Reduction of NO with NH.sub.3
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Journal Article
The Effect of SO.sub.2 and Ca Co-pretreatment on the Catalytic Activity of Mn-Ce/TiO.sub.2 Catalysts for Selective Catalytic Reduction of NO with NH.sub.3
2020
Overview
Mn-Ce/TiO.sub.2 catalysts were co-pretreated with SO.sub.2 and Ca and applied for the selective catalytic reduction (SCR) of NO with ammonia. The effect of co-pretreatment of SO.sub.2 and Ca on the physicochemical properties of catalysts was investigated by BET, XRD, XPS, NH.sub.3-TPD, H.sub.2-TPR, and UV-Vis techniques. The results show the co-pretreatment of SO.sub.2 and Ca greatly influences the physicochemical properties of catalysts such as texture characteristics, surface acidity and redox ability, amounts of active species and surface OH group, and therefore affects the catalytic activity of catalysts. The Mn-Ce-Ti(S-OH) catalyst co-pretreated with SO.sub.2 and Ca(OH).sub.2 exhibits better catalytic activity than Mn-Ce-Ti(S-Cl) catalyst co-pretreated with SO.sub.2 and CaCl.sub.2. The Mn-Ce-Ti(S-OH) catalyst possesses larger specific surface area, higher concentrations of surface active species and surface chemisorbed oxygen, better surface acidity and redox ability, which may contribute to the accelerated catalytic activity.
Publisher
Springer
Subject
