| Unraveling SO2-tolerant mechanism over Fe2（SO4）3/TiO2 catalysts for NOx reduction |
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| 作者姓名： | Chong Feng Lupeng Han Penglu Wang Xiangyu Liu Guangyuan Zhou Dengsong Zhang |
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| 作者单位： | State Key Laboratory of Advanced Special Steel,School of Materials Science and Engineering,International Joint Laboratory of Catalytic Chemistry,College of Sciences,Shanghai University,Shanghai 200444,China;State Key Laboratory of Advanced Special Steel,School of Materials Science and Engineering,International Joint Laboratory of Catalytic Chemistry,College of Sciences,Shanghai University,Shanghai 200444,China;Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China |
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| 基金项目： | the support of the National Natural Science Foundation of China (No. 21976117; 21906102)； |
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| 摘 要： | Developing low-temperature SO2-tolerant catalysts for the selective catalytic reduction of NOx is still a challenging task. The sulfation of active metal oxides and deposition of ammonium bisulfate deactivate catalysts, due to the difficult decomposition of the as-formed sulfate species at low temperatures（<300 °C）. In recent years, metal sulfate catalysts have attracted increasing attention owing to their good catalytic activity and strong SO2 tolerance at hi...
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| 收稿时间： | 2021/3/3 0:00:00 |
Unraveling SO2-tolerant mechanism over Fe2(SO4)3/TiO2 catalysts for NOx reduction |
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| Chong Feng,Lupeng Han,Penglu Wang,Xiangyu Liu,Guangyuan Zhou,Dengsong Zhang.Unraveling SO2-tolerant mechanism over Fe2(SO4)3/TiO2 catalysts for NOx reduction[J].Journal of Environmental Sciences,2022,34(1):340-350. |
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| Authors: | Chong Feng Lupeng Han Penglu Wang Xiangyu Liu Guangyuan Zhou Dengsong Zhang |
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| Institution: | 1. State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China;2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China |
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| Abstract: | Developing low-temperature SO2-tolerant catalysts for the selective catalytic reduction of NOx is still a challenging task.The sulfation of active metal oxides and deposition of am-monium bisulfate deactivate catalysts,due to the difficult decomposition of the as-formed sulfate species at low temperatures (＜300 ℃).In recent years,metal sulfate catalysts have attracted increasing attention owing to their good catalytic activity and strong SO2 toler-ance at higher temperatures (＞300℃);however,the SO2-tolerant mechanism of metal sul-fate catalysts is still ambiguous.In this study,Fe2(SO4)3/TiO2 and Ce2(SO4)3//TIO2 catalysts were prepared using the corresponding metal sulfate salt as the precursor.These cata-lysts were tested for their low-temperature activity and SO2 tolerance activity.Compared to Ce2 (SO4)3/TiO2,Fe2 (SO4)3/TiO2 showed significantly better low-temperature activity and SO2 tolerance.It was demonstrated that less surface sulfate species formed on Fe2(SO4)3/TiO2 and Ce2(SO4)3/TiO2.However,the presence of NO and O2 could assist the decomposition of NH4HSO4 over Fe2(SO4)3/TiO2 at a lower temperature,endowing Fe2(SO4)3/TiO2 with better low-temperature SO2 tolerance than Ce2(SO4)3/TiO2.This study unraveled the SO2-tolerant mechanism of Fe2(SO4)3/Tio2 at lower temperatures (＜300 ℃),and a potential strategy is proposed for improving the low-temperature SO2-tolerance of catalysts with Fe2(SO4)3 as the main active component or functional promoter. |
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| Keywords: | NOx Selective catalytic reduction Sulfate Catalysts SO2-tolerance |
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