The Research Of Synthesis, Characterization And Properties About Bimetallic Catalyst In Methane Autothermal Reforming

Synthesis gas is a kind of source of clean energy, the effective use of synthesis gas has become a hot research. Partial oxidation of methane to syngas is easy to produce hot spots and prone to explosion, therefore, it is difficult to obtain industrial applications. Carbon dioxide reforming of methane to syngas caused widespread concern in the industry over the world. However, this reaction is strong endothermic reaction, huge energy consumption and easy to cause carbon deposition. Combining CO₂ reforming and partial oxidation of methane to produce syngas can effectively eliminate the carbon deposition in CO₂ reforming reaction and the hot spots in the partial oxidation of methane, In addition, the ratio of H2 and CO can be modulated. Therefore, the process is expected to be a promising industrial application in recent years.In this paper, the active component Pt was added into the traditional catalyst Ni/γ-?Al₂O₃ to form the bimetallic catalyst. And also we choseSiO₂ andZrO₂ as supports to design some different catalyst.We characterized the bimetallic catalyst and studied its effects on the reaction of combining CO₂ reforming and partial oxidation of methane to produce syngas. The effects of the loding ammount of Ni and Pt, temperature, feed gas and precursors on the catalytic activity were invesitgated by using the fixed-bed reactor. In addition, the inter-relationship between the structure of catalyst and the catalytic activity was explained by using XRD, BET, TPR, TG and other testing methods. The results showed that the additive effect of Pt was obvious. The catalytic activity of the catalyst was greatly enhanced by Pt. However, it is no obvious effect on the Ni/SiO₂ catalyst. It was found that temperature had a more great effect on mono-metal catalyst compared with bi-metal catalyst. The catalytic activity of catalyst using SiO₂ orγ-Al₂O₃support is lower than ZrO₂ support. Our research revealed that the interaction between metal and carrier is an important factor in the catalytic activity.