Ni catalysts supported on nano-crystalline aluminum oxide prepared by a microemulsion method for dry reforming reaction |
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Authors: | Mohammad Hossein Aboonasr Shiraz Mehran Rezaei Fereshteh Meshkani |
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Institution: | 1.Catalyst and Advanced Materials Research Laboratory, Chemical Engineering Department, Faculty of Engineering,University of Kashan,Kashan,Iran;2.Institute of Nanoscience and Nanotechnology,University of Kashan,Kashan,Iran |
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Abstract: | Mesoporous nano-crystalline γ-Al2O3 with high surface area prepared by a microemulsion (ME) method was employed as carrier for nickel catalysts in dry reforming of methane for syngas production. The structural properties of the catalysts were characterized by X-ray diffraction, Brunauer–Emmett–Teller surface area analysis, temperature programmed reduction and oxidation and scanning electron microscopy techniques. Microemulsion showed it to be a promising way for the production of nano-crystalline aluminum oxide, and the nickel catalysts prepared with this support have significant features and properties to use in the dry reforming reaction. The results revealed that the prepared γ-Al2O3 exhibited a nano-crystalline structure (crystal size: c.4.8 nm) with a high specific surface area (308 m2 g?1). In addition, the catalysts with different nickel contents exhibited high catalytic activity in the dry reforming reaction. The results also showed that an increase in Ni loading from 5 to 15 wt% caused a decrease in the specific surface area and nickel dispersion. |
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