Performance of Ni/Nano-ZrO2 Catalysts for CO Preferential Methanation

doi:10.1016/S1004-9541(14)60027-6

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (2): 131-135.DOI: 10.1016/S1004-9541(14)60027-6

• 催化、动力学与反应工程 • 下一篇

Performance of Ni/Nano-ZrO₂ Catalysts for CO Preferential Methanation

刘其海¹, 董新法², 刘自力³

1 School of Chemistry and Chemical Engineering, ZhongKai University of Agriculture and Engineering, Guangzhou 510225, China;
2 School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;
3 School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China

收稿日期:2012-03-12 修回日期:2012-07-09 出版日期:2014-02-05 发布日期:2014-01-28
通讯作者: LIU Zili
基金资助:
Supported by the National Natural Science Foundation of China (21276054, 21376280).

Performance of Ni/Nano-ZrO₂ Catalysts for CO Preferential Methanation

LIU Qihai¹, DONG Xinfa², LIU Zili³

1 School of Chemistry and Chemical Engineering, ZhongKai University of Agriculture and Engineering, Guangzhou 510225, China;
2 School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;
3 School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China

Received:2012-03-12 Revised:2012-07-09 Online:2014-02-05 Published:2014-01-28
Contact: LIU Zili
Supported by:
Supported by the National Natural Science Foundation of China (21276054, 21376280).

摘要/Abstract

摘要： Large surface areas nano-scale zirconia was prepared by the self-assembly route and was employed as support in nickel catalysts for the CO selective methanation. The effects of Ni loading and the catalyst calcination temperature on the performance of the catalyst for CO selective methanation reaction were investigated. The catalysts were characterized by Brunauer-Emmett-Teller (BET), transmission electron microscope (TEM), X-ray diffraction (XRD) and temperature-programmed reduction (TPR). The results showed that the as-synthesized Ni/nano-ZrO₂ catalysts presented high activity for CO methanation due to the interaction between Ni active particle and nano zirconia support. The selectivity for the CO methanation influenced significantly by the particle size of the active Ni species. The exorbitant calcination resulted in the conglomeration of dispersive Ni particles and led to the decrease of CO methanation selectivity. Among the catalysts studied, the 7.5% (by mass) Ni/ZrO₂ catalyst calcinated at 500℃ was the most effective for the CO selective methanation. It can preferentially catalyze the CO methanation with a higher 99% conversion in the CO/CO₂ competitive methanation system over the temperature range of 260-280℃, while keeping the CO₂ conversion relatively low.

关键词: selective CO methanation, CO removal, nano zirconia, Ni catalysts

Abstract: Large surface areas nano-scale zirconia was prepared by the self-assembly route and was employed as support in nickel catalysts for the CO selective methanation. The effects of Ni loading and the catalyst calcination temperature on the performance of the catalyst for CO selective methanation reaction were investigated. The catalysts were characterized by Brunauer-Emmett-Teller (BET), transmission electron microscope (TEM), X-ray diffraction (XRD) and temperature-programmed reduction (TPR). The results showed that the as-synthesized Ni/nano-ZrO₂ catalysts presented high activity for CO methanation due to the interaction between Ni active particle and nano zirconia support. The selectivity for the CO methanation influenced significantly by the particle size of the active Ni species. The exorbitant calcination resulted in the conglomeration of dispersive Ni particles and led to the decrease of CO methanation selectivity. Among the catalysts studied, the 7.5% (by mass) Ni/ZrO₂ catalyst calcinated at 500℃ was the most effective for the CO selective methanation. It can preferentially catalyze the CO methanation with a higher 99% conversion in the CO/CO₂ competitive methanation system over the temperature range of 260-280℃, while keeping the CO₂ conversion relatively low.

Key words: selective CO methanation, CO removal, nano zirconia, Ni catalysts

刘其海, 董新法, 刘自力. Performance of Ni/Nano-ZrO₂ Catalysts for CO Preferential Methanation[J]. Chinese Journal of Chemical Engineering, 2014, 22(2): 131-135.

LIU Qihai, DONG Xinfa, LIU Zili. Performance of Ni/Nano-ZrO₂ Catalysts for CO Preferential Methanation[J]. Chin.J.Chem.Eng., 2014, 22(2): 131-135.

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Performance of Ni/Nano-ZrO₂ Catalysts for CO Preferential Methanation

Performance of Ni/Nano-ZrO₂ Catalysts for CO Preferential Methanation

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