Advances in catalysts for CO2 reforming of methane
Department of Materials Science and Engineering
CO2 reforming of methane is attractive, because it can convert two greenhouse gases into synthesis gas (H2/CO), which is an important feedstock for many industrial processes. So far, there is no commercial process for the reforming due to several issues, such as high energy cost and unavailability of effective catalysts. In the past 20 years, the research for CO2 reforming of methane has been focused on the development of catalysts. This chapter provides a critical assessment of the literature regarding catalysts for CO2 reforming of methane. Although noble metal catalysts, such as Rh, have excellent activity and selectivity as well as stability, the high cost limits their industrial application for CO2 reforming of methane. On the other hand, non-noble metal catalysts (particularly Ni-based catalysts) exhibit excellent catalytic activity and selectivity at low cost. However, their stability is poor due to carbon deposition. Therefore, the inhibition of carbon deposition for non-noble metal catalysts became the most important topic for CO2 reforming of methane. The strategies, which were exploited to inhibit carbon deposition, are to control particle sizes of active components and to increase the surface basicity of catalysts. Several approaches were developed to control the metal particle sizes, including the enhancement of metal-support interaction, the formation of solid solutions, and plasma-treatments. To increase the surface basicity of catalysts, basic metal oxides were employed as support or promoter. © 2010 American Chemical Society.
ACS Symposium Series
Hu, Y. H.
Advances in catalysts for CO2 reforming of methane.
ACS Symposium Series,
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