| Effect of Na+on catalytic performance of CoCe/ZSM-5 catalysts for oxidation of toluene |
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| 作者姓名： | Qingping Zou Mingqing Liu Mengjie Fan Yaping Ding Yingwen Chen Shubao Shen |
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| 作者单位： | College of Biotechnology and Pharmaceutical Engineering;Nanjing Institute of Environmental Sciences |
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| 基金项目： | Project supported by Science and Technology Department of Jiangsu Province(BE2016769). |
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| 摘 要： | A CoCe/ZSM-5 catalyst was prepared by ultrasonic-assisted impregnation for the catalytic combustion of toluene.To study the effect of Na+on catalytic performance of CoCe/ZSM-5 catalysts,a series of different Si/Al ZSM-5 zeolites and catalysts doped with Na were synthesized.The experimental results show that 0.71 wt%Na+can inhibit active growth,generate more active small crystal grains,and promote improvement of the catalytic activity by the grain boundary segregation block mechanism,and the catalyst with 0.71 wt%of Na shows toluene conversion of 90 vol%at 250℃.Over 0.71 wt%of Na+content will neutralize the acid centre of the catalyst,lowering the specific surface area of the catalyst and resulting in a gradual decrease in the catalytic activity.
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| 关 键 词： | ZSM-5 zeolite Catalytic combustion TOLUENE Grain boundary segregation block MECHANISM Rare earths |
| 收稿时间： | 20 March 2020 |
Effect of Na~+ on catalytic performance of CoCe/ZSM-5 catalysts for oxidation of toluene |
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| Qingping Zou,Mingqing Liu,Mengjie Fan,Yaping Ding,Yingwen Chen,Shubao Shen.Effect of Na+on catalytic performance of CoCe/ZSM-5 catalysts for oxidation of toluene[J].Journal of Rare Earths,2021,39(4):409-418. |
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| Authors: | Qingping Zou Mingqing Liu Mengjie Fan Yaping Ding Yingwen Chen Shubao Shen |
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| Affiliation: | 1. College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China;2. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China |
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| Abstract: | A CoCe/ZSM-5 catalyst was prepared by ultrasonic-assisted impregnation for the catalytic combustion of toluene. To study the effect of Na+ on catalytic performance of CoCe/ZSM-5 catalysts, a series of different Si/Al ZSM-5 zeolites and catalysts doped with Na were synthesized. The experimental results show that 0.71 wt% Na+ can inhibit active growth, generate more active small crystal grains, and promote improvement of the catalytic activity by the grain boundary segregation block mechanism, and the catalyst with 0.71 wt% of Na shows toluene conversion of 90 vol% at 250 °C. Over 0.71 wt% of Na+ content will neutralize the acid centre of the catalyst, lowering the specific surface area of the catalyst and resulting in a gradual decrease in the catalytic activity. |
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| Keywords: | ZSM-5 zeolite Catalytic combustion Toluene Grain boundary segregation block mechanism Rare earths |
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