Thesis (M.Eng.)--Chulalongkorn University, 2014

In the present research, the effect of monometallic (10%wt.Ni, 10%wt.Co) and bimetallic (5%wt.NiCo) on different supports are H-Beta-Al2O3, Al2O3-SiO2 prepared by sol-gel method, and Gamma-alumina commercial catalysts. In addition, to study the effect of bimetallic catalysts with different loading ratio of nickel metal and cobalt metal on H-Beta-Al2O3 supports. Loading ratios of nickel and cobalt indicates as followed 1:3, 1:1, and 3:1. The catalytic activity tests for carbon dioxide reforming of methane at 700˚C and atmospheric pressure. It was found that the optimize bimetallic (5%wt.Ni5%wt.Co) which contained Ni:Co in a ratio of 1:1 supported on H-Beta-Al2O3 catalyst prepared by Sol-gel exhibit highest methane and carbon dioxide conversion in carbon dioxide reforming of methane reaction. The superior catalytic performance can be explain by the optimize amount of nickel and cobalt active sites and the smaller with NiO and CoO particles due to higher dispersion implied an easier reducibility and a shift the reduction temperature toward lower temperature. In Addition, the optimize cobalt addition which contained Ni:Co in a ratio of 1:1 has improving nickel metal dispersion of catalysts due to reduce the agglomerate of nickel particles. These features mirror a substantially higher resistance to carbon deposition of cobalt-containing catalysts.