Abstract
In this study, it was aimed to develop new catalysts to increase the conversion of environmentally harmful carbon dioxide gas to methane which is a valuable fuel. By using a natural clay mineral sepiolite (SEP) as support material; 6-8% (weight-weight) Ni-containing catalysts were prepared by impregnation. Catalysts were characterized by XRD and FT-IR analysis. Reaction conditions of catalytic hydrogenation of carbon dioxide for methane production were determined as: H2/CO2 = 4 molar ratio, the temperature range of 300-600°C at atmospheric pressure. The output gas mixture was analyzed using the µGC. The activities of the catalysts were determined in terms of carbon dioxide conversion and methane selectivity. 6%Ni/SEP and 8%Ni/SEP provided 65.76% and 68.42% carbon dioxide conversion at 400°C, respectively. In addition, both catalysts exhibited high methane selectivity at 300 and 400°C (>98%).
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