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Clays and Clay Minerals; December 2005; v. 53; no. 6; p. 622-630; DOI: 10.1346/CCMN.2005.0530608
© 2005 Clay Minerals Society
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NICKEL CATALYSTS SUPPORTED ON MgO/SMECTITE-TYPE NANOCOMPOSITES FOR METHANE REFORMING

Alexander Moronta*,{dagger}, Nobuhiro Iwasa, Shin-Ichiro Fujita, Masahide Shimokawabe and Masahiko Arai

Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University, Kita 12, Nishi 8, Kita-ku, Sapporo 060-8628, Japan

* E-mail address of corresponding author: amoronta{at}luz.edu.ve

MgO-clay nanocomposites were prepared from a synthetic smectite-type clay, TS, using three different non-ionic surfactants (Igepal CA-720, Brij 30 and Brij 56) and the resulting clay nanocomposites were impregnated with Ni for the methane reforming reaction with carbon dioxide to synthesis gas. A Ni/TS catalyst was also prepared for comparison. The prepared supports and catalysts were characterized by X-ray diffraction, X-ray fluorescence, thermogravimetric analysis and N2 adsorption/desorption isotherms. The thermal stability, pore structure and the surface area strongly influence the catalytic behavior of the catalysts. The methane conversions (at 700°C for 4 h) were 91, 95 and 97% for Ni/TSIGE, Ni/TSBR30 and Ni/TSBR56, respectively, indicating that the surface properties and the catalytic performance of the resulting solids slightly improved as the polyethylene oxide number of the surfactant increased. A reduced conversion (10%) and a rapid deactivation was observed in the Ni/TS catalyst, attributed to its Na content and low thermal stability, which led to sintering and coke deposition.

Key Words: Clay Nanocomposites • Dry Reforming of Methane • Ni Catalysts • Synthesis Gas






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