(621cw) Tri-Reforming of Methane over Nickel-Based Catalysts
Rising concentration of greenhouse gases in the atmosphere requires new technologies to limit CO2 emissions. The catalytic tri-reforming process has been proposed to utilize CO2 emissions from the flue gas of fossil fuel fired power plants without the need of CO2 pre-separation step while producing syngas with a suitable H2:CO ratio desired for Fischer-Tropsch process and methanol synthesis. Tri-reforming process requires development of a promising catalyst that has high surface area, good redox properties, and high O2 storage capacity. Additionally, the catalyst needs to be thermally stable at temperatures between 700 °C and 900 °C, resistant to coke formation and economically viable.
Initial efforts of this work are focused on determining activity of Ni particles supported over metal oxides at different flue gas conditions and CH4 molar ratios. The conversion, selectivity and stability of the catalysts are evaluated at different feed ratios in a fixed bed reactor. Additional efforts are focused on evaluating the influence of particle size to the catalyst activity. Post characterization of catalysts are performed to determine the sintering of Ni particles and coke deposition on the catalysts.