CO2 Reforming of CH4 over Xerogel Ni−Ti and Ni−Ti−Al Catalysts
journal contributionposted on 20.06.2007, 00:00 by Haijun Sun, Jian Huang, Hui Wang, Jianguo Zhang
CO2 reforming of CH4 reaction was studied over the Ni based xerogel catalysts. The Ni−Ti and Ni−Ti−Al xerogel composites were prepared using the sol−gel method and reduced in H2−N2 mixture gas. The reaction was conducted at 973 K in a micropacked-bed reactor. Brunauer−Emmett−Teller (BET), X-ray diffraction (XRD), and thermogravimetric/differential thermal analysis (TG/DTA) were used to characterize the fresh and spent (after reaction) catalyst samples. Compared with the published data, it has been found that the carbon deposition on both Ni−Ti and Ni−Ti−Al xerogel catalysts is effectively suppressed. Ni−Ti−Al xerogel catalyst reveals higher activity and longer stability than Ni−Ti xerogel catalyst does, due to its larger surface area and more resistance to Ti reduction. However, further study is anticipated to eliminate the carbon deposition on these xerogel catalysts.