Nickel catalysts for internal reforming in molten carbonate fuel cells
作者： R.J. Berger , E.B.M. Doesburg , J.G. van Ommen , J.R.H. Ross
DOI: 10.1016/0926-860X(96)00099-3
关键词: Steam reforming 、 Hydrogen fuel 、 Catalysis 、 Alkali metal 、 Inorganic chemistry 、 Catalyst support 、 Molten carbonate fuel cell 、 Chemistry 、 Nickel 、 Potassium hydroxide
摘要: Natural gas may be used instead of hydrogen as fuel for the molten carbonate cell (MCFC) by steam reforming natural inside MCFC, using a nickel catalyst (internal reforming). The severe conditions however, require that has very high stability. In order to find suitable types catalysts and obtain more knowledge about deactivation mechanism(s) occurring during internal reforming, series was prepared subjected stability tests at 973 K in an atmosphere containing lithium potassium hydroxide vapours. All showed significant growth crystallites test, especially one based on ?-Al2O3 coprecipitated Ni/Al2O3 sample having content. However, this only partially explained strong observed most cases. Only nickel/alumina with alumina content deposition-precipitation satisfactory residual activities. Addition magnesium or lanthanum oxide decreased stability. Adsorption retention alkali important factor determining hydroxides. This is because bed remain active if small part retains all alkali.
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