Abstract
The influence of Fe, Co, Ni and Ca nitrate additives on the gasification of commercial graphite electrodes with hydrogen was characterized by TPR measurements. The order of catalytic activity has been established as Ni > Co > > Fe. The low temperature peaks at 300–400 °C appear on preoxidized surfaces only. Ca, inactive alone, shows strong promotion of the catalytic gasification with hydrogen, especially in the case of the Co catalyst. The highest synergistic effect has been found for the Co/Ca/CO 2 activated sample. Samples activated in CO 2 show higher reactivity in the methane formation than the samples activated in O 2.
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