A highly effective and stable nano-sized Ni/MgO–Al2O3 catalyst for gas to liquids (GTL) process

Highly active and stable nano-sized Ni catalysts supported on MgO–Al2O3 prepared from hydrotalcite-like materials have been designed for the combined steam and carbon dioxide reforming of methane (CSCRM), which is a useful process to adjust the H2/CO ratio for Fischer–Tropsch process. Ni/MgO–Al2O3 exhibits remarkable coke resistance, while commercial Ni/MgAl2O4 catalyst shows considerable coke deposition during the target reaction. A strong metal to support interaction (SMSI) of Ni/MgO–Al2O3 enhances coke resistance. The change of the surface area and NiO crystallite size with varying the precalcination temperature of support was investigated in relation to the coke resistance. It has been concluded that highly dispersed Ni metal pre-calcined at 8001C shows good coke resistance and high activity. As a consequence, Ni/MgO–Al2O3 catalyst will be a promising catalyst in CSCRM for the GTL process.

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