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| Selective Oxidation of CO in Excess H2 over Ru/Al2O3 Catalysts Modified with Metal Oxide | |
| 作者姓名： | Xirong Chen Hanbo Zou Shengzhou Chen Xinfa Dong Weiming Lin |
| 作者单位： | 1，2 |
| 基金项目： | 国家自然科学基金;广东省自然科学基金 |
| 摘 要： | The Ru/Al_2O_3 catalysts modified with metal oxide(K_2O and La_2O_3)were prepared via incipient wetness impregnation method from RuCl_3·nH_2O mixed with nitrate loading on Al_2O3 support. The activity of catalysts was evaluated under simulative conditions for the preferential oxidation of CO (CO-PROX)from the hydrogen-rich gas streams produced by reforming gas,and the performances of catalysts were investigated by XRD and TPR.The results showed that the activity temperature of the modified catalysts Ru-K_2O/Al_2O3 and Ru-La_2O_3/Al_2O_3 were lowered approximately 30℃compared with pure Ru/Al_2O_3,and the activity temperature range was widened.The conversion of CO on Ru-K_2O/Al_2O_3 and Ru-La_2O_3/Al_2O_3 was above 99% at 140-160℃,suitable to remove CO in a hydrogen-rich gas and the selectivity of Ru-La_2O_3/Al_2O_3 was higher than that of Ru-K_2O/Al_2O_3 in the active temperature range. Slight methanation reaction was detected at 220℃and above. |
| 关 键 词： | 含氢气体 钌系催化剂 金属氧化物 选择性氧化过程 |
| 收稿时间： | 2007-09-19 |
| 修稿时间： | 2007-10-29 |
Selective Oxidation of CO in Excess H2 over Ru/Al2O3 Catalysts Modified with Metal Oxide |
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| Xirong Chen Hanbo Zou Shengzhou Chen Xinfa Dong Weiming Lin.Selective Oxidation of CO in Excess H2 over Ru/Al2O3 Catalysts Modified with Metal Oxide[J].Journal of Natural Gas Chemistry,2007,16(4):409-414. | |
| Authors: | Xirong Chen Hanbo Zou Shengzhou Chen Xinfa Dong Weiming Lin |
| Institution: | aSchool of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510641, Guangdong, China bSchool of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China |
| Abstract: | The Ru/Al2O3 catalysts modified with metal oxide (K2OandLa2O3) were prepared via incipient wetness impregnation method from RuCl3·nH2O mixed with nitrate loading on Al2O3 support. The activity of catalysts was evaluated under simulative conditions for the preferential oxidation of CO (CO-PROX) from the hydrogen-rich gas streams produced by reforming gas, and the performances of catalysts were investigated by XRD and TPR. The results showed that the activity temperature of the modified catalysts Ru-K2O/Al2O3 and Ru-La2O3/Al2O3 were lowered approximately 30 °C compared with pure Ru/Al2O3, and the activity temperature range was widened. The conversion of CO on Ru-K2O/Al2O3 and Ru-La2O3/Al2O3 was above 99% at 140–160 °C, suitable to remove CO in a hydrogen-rich gas and the selectivity of Ru-La2O3/Al2O3 was higher than that of Ru-K2O/Al2O3 in the active temperature range. Slight methanation reaction was detected at 220 °C and above. |
| Keywords: | hydrogen-rich gas ruthenium based catalysts CO removal selective oxidation metal oxide |
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