Effect of precipitants on Ni-CeO2 catalysts prepared by a co-precipitation method for the reverse water-gas shift reaction

稀土学报(英文版), 2013, (10): 969-974. doi: 10.1016/S1002-0721(12)60387-1

王路辉 ^1, , 刘辉 ^2, , 刘源 ^3, , 陈英 ^4, , 杨淑清 ^5,

1.Department of Chemical Engineering, School of Petrochemical Technology and Energy Engineering, Zhejiang 0cean University, Zhoushan 316000, China

2.School of Food and Pharmaceutical, Zhejiang 0cean University, Zhoushan 316004, China

3.Department of Catalysis Sciences and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, China

4.Department of Chemical Engineering, School of Petrochemical Technology and Energy Engineering, Zhejiang 0cean University, Zhoushan 316000, China

5.Department of Chemical Engineering, School of Petrochemical Technology and Energy Engineering, Zhejiang 0cean University, Zhoushan 316000, China

基金项目: Foundation of the Dinghai Academy of Science and Technology(201006) Natural Science Foundation of Zhejiang Province(Y4110220) Foundation of the Zhejiang Provincial Depart-ment of Education(Y200908245)

Effect of precipitants on Ni-CeO2 catalysts prepared by a co-precipitation method for the reverse water-gas shift reaction

WANG Luhui ^1, , LIU Hui ^2, , LIU Yuan ^3, , CHEN Ying ^4, , YANG Shuqing ^5,

1.Department of Chemical Engineering, School of Petrochemical Technology and Energy Engineering, Zhejiang 0cean University, Zhoushan 316000, China

2.School of Food and Pharmaceutical, Zhejiang 0cean University, Zhoushan 316004, China

3.Department of Catalysis Sciences and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, China

4.Department of Chemical Engineering, School of Petrochemical Technology and Energy Engineering, Zhejiang 0cean University, Zhoushan 316000, China

5.Department of Chemical Engineering, School of Petrochemical Technology and Energy Engineering, Zhejiang 0cean University, Zhoushan 316000, China

Keywords： reverse water-gas shift reaction

A series of Ni-CeO2 catalysts were prepared by co-precipitation method with Na2CO3, NaOH, and mixed precipitant (Na2CO3:NaOH;1:1 ratio) as precipitant, respectively. The effect of the precipitants on the catalytic performance, physical and chemical properties of Ni-CeO2 catalysts was investigated with the aid of X-ray diffraction (XRD), Brumauer-Emmett-Teller method (BET), Fou-rier-transform infrared spectroscopy (FT-IR), thermogravimetry (TG), and H2-TPR characterizations. The Ni-CeO2 catalysts were exam-ined with respect to their catalytic performance for the reverse water-gas shift reaction, and their catalytic activities were ranked as:Ni-CeO2-CP (Na2CO3:NaOH=1:1)>Ni-CeO2-CP(Na2CO3)>Ni-CeO2-CP(NaOH). Correlating to the characteristic results, it was found that the catalyst prepared by co-precipitation with mixed precipitant (Na2CO3:NaOH; 1:1 ratio) as precipitant had the most amount of oxygen vacancies accompanied with highly dispersed Ni particles, which made the corresponding Ni-CeO2-CP(Na2CO3:NaOH=1:1) catalyst exhibit the highest catalytic activity. While the precipitant of Na2CO3 or NaOH resulted in less or no oxygen vacancies in Ni-CeO2 catalysts. As a result, Ni-CeO2-CP(Na2CO3) and Ni-CeO2-CP(NaOH) catalysts presented poor catalytic performance.

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Effect of precipitants on Ni-CeO2 catalysts prepared by a co-precipitation method for the reverse water-gas shift reaction

参考文献