2O3 catalysts; NO oxidation"/> 2O3 catalyst. A larger amount of nitrate and nitrite species was observed in the fresh Pt/Al2O3 catalysts blow 300 oC. It is shown that PtOx species that interacted strongly with support are the main cause of degreening effect. The particle size of Pt has no significant change after 3-cycles temperature-programmed reaction."/>
Degreening Effect during NO Oxidation over Pt/Al2O3 Catalyst
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Wuxi Weifu Environmental Catalysts Co., Ltd,,,,,,
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Abstract:
Partial NO is oxidized to NO2 during the emission gas through diesel oxidation catalysts (DOC). Proper NO2 /NOx ratio increases the low-temperature soot oxidation rate of diesel particulate filter (DPF) and the NOx conversion efficiency of selective catalytic reduction (SCR). In order to study the degreening effect of DOC, in-situ diffuse reflectance infrared Fourier transform spectroscopy (In-situ DRFTS), H2 temperature-programmed reduction (H2-TPR) and High-revolution transmission electron microscope (HR-TEM) were performed to characterize the Pt/Al2O3 catalyst. A larger amount of nitrate and nitrite species was observed in the fresh Pt/Al2O3 catalysts blow 300 oC. It is shown that PtOx species that interacted strongly with support are the main cause of degreening effect. The particle size of Pt has no significant change after 3-cycles temperature-programmed reaction.
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[JIA LIWEI, WAN TAOMING, WANG JUN, SHEN MEIQING, WANG JIANQIANG, WANG JIAMING. Degreening Effect during NO Oxidation over Pt/Al2O3 Catalyst[J]. Rare Metal Materials and Engineering,2018,47(5):1562~1566.] DOI：[doi]