Zhang Anjie^{1, 2}, Ding Tianying ², Liu Yun ^{1, 2}, Shi Chuan ^{1, 2}

(1State key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116012; 2Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian, 116024)

Abstract: The synergistic effects of CO₂ reforming of methane over a combined system of DBD plasma and Cu-Ni/γ-Al₂O₃ catalyst were examined. Interaction between DBD plasma and catalyst leads to the significant improvements in catalytic performance of CH₄ and CO₂ conversions and CO and H₂ selectivities as compared to those which was only on the plasma and/or on the catalyst. A synergistic effect between plasma and catalysis is achieved over a combined system of DBD plasma and Cu-Ni/γ-Al₂O₃ catalyst. XRD, H₂-TPR, XPS and O₂-TPO were employed for characterizing the physical and chemical properties of fresh and used Cu-Ni/γ-Al₂O₃ catalyst. The results show that there is an interaction between Ni and Cu species that affected the reducibility of the species concerned and with the introduction of Cu species the Ni dispersion increases. Moreover, the combined system of DBD plasma and Cu-Ni/γ-Al₂O₃ catalyst enhanced the coke-resistance ability of the catalyst.

Key words: methane; carbon dioxide; dielectric-barrier discharge; syngas; reforming;

E-mail: zhangaj@mail.dlut.edu.cn

Journal of Molecular Catalysis, Vol. 25, Issue 1, 2011, 11~16