Separate production of hydrogen and carbon monoxide by carbon dioxide reforming reaction of methane

Abstract

Abstract First, modeling of the carbon dioxide reforming reaction (CO 2 RR) mechanism was carried out by the chemical affinity values of the individual elementary reactions which would be involved in the overall reaction. The chemical affinity values were obtained from a composition of an outlet stream passed through a catalyst bed. The catalysts used were Ni, Ru, Rh, Pd and Pt supported on MgO. As a result, the decomposition of CH 4 to give carbonaceous deposits and H 2 was the slowest step in CO 2 RR. Then, a separate production of H 2 and CO over Ni catalysts from an alternate stream of CH 4 and CO 2 was proved by the use of a flow system equipped with two reactors in parallel, two selector valves, and two gas reservoirs. As a result, such mixtures were obtained as H 2 (74%)+CH 4 (18%) and CO(71%)+CO 2 (17%) when Ni/αAl 2 O 3 was used as a catalyst.