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Title: Methane reforming with carbon dioxide over a Ni/ZiO2–SiO2 catalyst : influence of pretreatment gas atmospheres
Authors: Liu, Dapeng
Wang, Yifan
Shi, Daming
Jia, Xinli
Wang, Xin
Borgna, Armando
Lau, Raymond
Yang, Yanhui
Issue Date: 2012
Source: Liu, D., Wang, Y., Shi, D., Jia, X., Wang, X., Borgna, A., et al. (2012). Methane reforming with carbon dioxide over a Ni/ZiO2–SiO2 catalyst: Influence of pretreatment gas atmospheres. International Journal of Hydrogen Energy, 37(13), 10135-10144.
Series/Report no.: International journal of hydrogen energy
Abstract: Carbon dioxide reforming of methane to synthesis gas was studied over Ni/ZrO2–SiO2 catalyst under different pretreatment atmospheres. Characterization using powder X-ray diffraction, H2 temperature-programmed reduction, H2 temperature-programmed hydrogenation, TG/DTA, XPS, Raman spectra and transmission electron microscopy techniques revealed that gas atmospheres employed in the catalyst pretreatment have a significant influence on the catalytic performance. The helium-pretreated catalyst was found to be the most suitable catalyst for this application, showing the improved catalytic performance. More specifically, helium pretreatment facilitated the generation of well-distributed active metal sites while the heterogeneity of Ni components upon H2 pretreatment degraded catalytic activity of metal sites considerably. Pretreatment under CO atmosphere resulted in the formation of carbon encapsulated metal species thus causing catalyst deactivation severely. Inefficient reduction under CH4 activation and the presence of a great amount of carbonaceous species, disfavor the production of synthesis gas during the dry reforming.
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2012.03.158
Rights: © 2012 Hydrogen Energy Publications, LLC.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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