Sulfation of Pt/Al2O3 catalyst for soot oxidation: High utilization of NO2 and oxidation of surface oxygenated complexes
作者： Shuang Liu , Xiaodong Wu , Duan Weng , Min Li , Jun Fan
DOI: 10.1016/J.APCATB.2013.02.053
关键词: Metal 、 Sulfate 、 Catalysis 、 Chemistry 、 Oxidizing agent 、 Soot 、 Adsorption 、 Inorganic chemistry 、 Platinum 、 Decomposition 、 Process Chemistry and Technology 、 General Environmental Science
摘要: Abstract The sulfated Pt/Al 2 O 3 catalyst was synthesized by impregnating H SO 4 on the catalyst. It exhibits higher catalytic activity than for soot oxidation under loose contact conditions in a feed flow containing NO and . Further studies ascribe its good to synergistic effect between sulfate species platinum. Firstly, electronegative may improve oxidation-resistance of metallic platinum oxidizing atmosphere, which is important achieving high NO ↔ NO ↔ soot recycling efficiency; Secondly, inhibit x adsorption alumina support, leading preferential surface rather catalyst, thus provide more chances -soot reaction generate oxygenated complexes (SOCs); Finally, can promote further decomposition these SOCs species, resulting efficiency oxidation.
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