Methane Production from Carbon Oxides Over Borohydride-Reduced Transition Metals.

摘要

This study was undertaken to continue the examination of the utility of borohydride-reduced transition metals as catalysts for the hydrogenation of carbon oxides to produce synthetic fuels. While most related efforts deal only with carbon monoxide (the predominant oxide in coal gasification processes),we have included carbon dioxide as well in our work. Work with cobalt,copper,nickel and palladium has resulted in methane production from both carbon oxides,with carbon dioxide being only slightly less productive than carbon monoxide. From the last three metals,methane is the only product formed (besides water). This is a definite improvement over many of the catalysts reported in the scientific literature,where a major problem is the production of numerous carbon-containing products. Completion of construction of a second flow system has allowed several questions from earlier work to be answered. Continuous methanation over nickel has shown no decrease in methane production during a two-week run. Continuous methanation over cobalt in the presence of 10ppm of sulfur dioxide has shown an increase in methane production during a two-week run.