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- W201973327 abstract "Metal-support effects in the CO hydrogenation reaction, similar to those reported earlier for Pd based catalysts were observed with nickel/TiO/sub 2/ and ruthenium/TiO/sub 2/ systems. The activity of Ni/TiO/sub 2/ was significantly greater than that of Ni powder or Ni on SiO/sub 2/, Al/sub 2/O/sub 3/, or graphite, and its selectivity was shifted to higher molecular weight paraffinic hydrocarbons. In contrast to Ni/Al/sub 2/O/sub 3/, Ni/TiO/sub 2/ showed little or no deactivation with time; this indicates a greater resistance to carbon deposition and/or metal sintering. The rate of Ni(CO)/sub 4/ formation was at least an order of magnitude less for Ni/TiO/sub 2/ than for Ni/SiO/sub 2/. The Ru/TiO/sub 2/ system also exhibited unusually low CO and H/sub 2/ adsorption capacities. In the methanation reaction over both 2Vertical Bar3< Ru/TiO/sub 2/ and 5Vertical Bar3< Ru/g-Al/sub 2/O/sub 3/, the reaction rates were proportional to the total pressure up to approx.10 atm and then stabilized or even declined, but methane formation was significantly lower and olefin yields much higher (up to 60Vertical Bar3< by wt) over Ru/TiO/sub 2/ than over Ru/Al/sub 2/O/sub 3/ or Ru powder. Increasing pressure reduced methane formation over both Ru catalysts, but the fraction of olefins in the productmore » did not increase.« less" @default.
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- W201973327 title "Metal-support effects in the CO hydrogenation reaction" @default.
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