Citation: HOU Yue, ZHANG Rong-jun, LU Qiang, YANG Shao-xia, LI Ming-feng. Research on electro-catalytic steam reforming of methane with modified Ni/γ-Al₂O₃ catalysts[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(4): 489-499. shu

Research on electro-catalytic steam reforming of methane with modified Ni/γ-Al₂O₃ catalysts

1.
National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
2.
Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China

Corresponding author: LU Qiang, qianglu@mail.ustc.edu.cn
Received Date: 21 September 2017
Revised Date: 18 January 2018

Fund Project: Beijing Nova Program Z171100001117064Fundamental Research Funds for the Central Universities 2016YQ05Fundamental Research Funds for the Central Universities 2015ZZD02The project was supported by Fundamental Research Funds for the Central Universities (2016YQ05, 2015ZZD02), Beijing Nova Program (Z171100001117064) and State Key Laboratory of Catalytic Materials and Reaction Engineering (RIPP, SINOPEC)

Figures(8)

A novel electro-catalytic technique for catalytic methane steam reforming was developed. Based on the conventional industrial Ni-based catalyst, aseries of catalysts, including Ni/γ-Al₂O₃, Ni-MgO/γ-Al₂O₃ and Ni-CaO/γ-Al₂O₃, were prepared using incipient wetness impregnation method with Ni as the active component, γ-Al₂O₃ as the carrier, and MgO or CaO as the promoter. Experiments were performed to investigate the effects of electric current intensity, reforming temperature, and molar ratio of water vapor to methane (water/carbon ratio, S/C) on CH₄ conversion, H₂ yield, CO selectivity and catalyst stability. The results indicated that the electro-catalytic technique had good adaptability, and the introduction of electric current could improve the CH₄ conversion and increase the H₂ yield. Such effects were more intensive at lower reforming temperatures. Among the three catalysts, Ni-CaO/γ-Al₂O₃ catalyst exhibited the best catalytic efficiency, with the CH₄ conversion over 95% under conditions of 4.5 A, S/C of 3, and 700℃. Stability tests of the catalysts showed that the electric current could improve the stability of catalysts and delay the deactivation caused by coke deposition. The characterization results proved that the presence of electric current enhanced the reduction degree of NiO in the catalyst and inhibited NiC_x conversion to graphite carbon, resulting the delay of catalyst deactivation caused by carbon deposition over reactive sites.
- electrochemical catalytic steam reforming,
- methane,
- Ni-based catalyst,
- carbon-resistance
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沈阳化工大学材料科学与工程学院沈阳 110142

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Research on electro-catalytic steam reforming of methane with modified Ni/γ-Al₂O₃ catalysts