Effect of Ru and Ni ratio on selective CO methanation over Ru–Ni/TiO2

Role of trace chlorine in Ni/TiO2 catalyst for CO selective methanation in reformate gas

“…In our recent work, we have reported that Ru and Ni based catalysts exhibited superior activity [61][62][63][64][65][66][67][68] for CO-SEMT. Especially, Ru and Ni catalysts supported on the titania supplied from Evonik Degussa (P25) showed high activity for CO methanation with high CO/CO 2 reaction selectivity in the CO-SMET reaction.…”

Degradation Factors of Ni/TiO₂ Catalysts for Selective CO Methanation: Effect of Loss of Residual Cl on Catalyst

“…10 wt% Ni/TiO2 (named Ni/TiO2) was obtained from Nikki-Universal Co., Ltd., as prepared by a conventional impregnation method 14), 27) . TiO2 (Evonik Degussa, P-25) was impregnated with an aqueous solution of nickel (II) nitrate hexahydrate (Wako Pure Chem.…”

“…CH4 concentration monotonically increased as T increased at 225 and 300 . CH4 concentration at high temperature reflects the activity in the RWGS reaction because CO2 methanation proceeds via the RWGS reaction and subsequent CO methanation 7),21), 27) . Figure 1(a) shows that CO was completely methanated at high temperatures, which means that the generation rate of CO via the RWGS reaction was much slower than the consumption rate of CO.…”

“…The CO concentration is determined by the difference between CO production, CO consumption, and CO content in the reaction gas. Therefore, a high CO production rate is expected to result in a slower decrease in CO concentration over Ni/ TiO2-300 27) .…”

Highly efficient non-noble metal based nanostructured catalysts for selective CO methanation

“…The acceptable CO concentrations at Pt anode and CO-tolerant alloy anodes in the fuel cells are less than10 ppm and less than100 ppm, respectively [7]. Many efforts have been focused on development of metal catalysts, which bear highcatalytic performances within a wide operating temperature window (190 -250 ˚C) and longterm durability [8].…”