The influence of transition metals on the thermal decomposition of calcium carbonate in hydrogen

Abstract The influence of coprecipitated transition metals on the thermal decomposition of CaCO 3 in hydrogen was investigated for the 3d metals Fe, Ni, Co and Cu and the 4d metals Ru, Rh, Pd and Ag. A correlation between the decomposition temperature and the distribution of the volatile products CO 2 , CO and CH 4 was found, which could be interpreted by the thermodynamics of the different reactions and the catalytic activity of the transition metals.