TY - JOUR
T1 - Design of fischer-tropsch catalysts by pulse surface reaction rate analysis. II. Selective Production of Liquid Fuel Fraction on Ruthenium/Alumina Catalyst Promoted by Rare Earth Oxides
AU - Takahashi, Naoki
AU - Mori, Toshiaki
AU - Miyamoto, Akira
AU - Hattori, Tadashi
AU - Murakami, Yuichi
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Energy Research from the Ministry of Education, Science and Culture, Japan (No. 60040016).
PY - 1988
Y1 - 1988
N2 - For selective production of liquid fuels, Fischer-Tropsch catalysts were designed by adding rare earth oxides to ruthenium/alumina on the basis of the following working hypothesis; the redox property should lead to the enhancement of the dissociation of the CO bond and accordingly to high activity and selectivity, and the basic property should further improve the selectivity. PSRA (pulse surface reaction rate analysis) measurements revealed that in the hydrogenation of carbon monoxide on ruthenium/alumina, probably due to the redox property, rare earth oxide increased the rate constant for the dissociation of the CO bond and decreased that for the hydrogenation of the resulting surface carbon species. In the continuous flow hydrogenation of carbon monoxide under pressure, it was found that the addition of rare earth oxides resulted in an increase in the turnover frequency, as expected from the enhanced CO bond dissociation. Consistent with the results obtained from PSRA experiments, rare earth oxide also increased the selectivity for the production of higher hydrocarbons. The selectivity improvement was more pronounced than that by the oxides of vanadium, niobium, molybdenum and tungsten, which may be ascribable to the basic property of rare earth oxides.
AB - For selective production of liquid fuels, Fischer-Tropsch catalysts were designed by adding rare earth oxides to ruthenium/alumina on the basis of the following working hypothesis; the redox property should lead to the enhancement of the dissociation of the CO bond and accordingly to high activity and selectivity, and the basic property should further improve the selectivity. PSRA (pulse surface reaction rate analysis) measurements revealed that in the hydrogenation of carbon monoxide on ruthenium/alumina, probably due to the redox property, rare earth oxide increased the rate constant for the dissociation of the CO bond and decreased that for the hydrogenation of the resulting surface carbon species. In the continuous flow hydrogenation of carbon monoxide under pressure, it was found that the addition of rare earth oxides resulted in an increase in the turnover frequency, as expected from the enhanced CO bond dissociation. Consistent with the results obtained from PSRA experiments, rare earth oxide also increased the selectivity for the production of higher hydrocarbons. The selectivity improvement was more pronounced than that by the oxides of vanadium, niobium, molybdenum and tungsten, which may be ascribable to the basic property of rare earth oxides.
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U2 - 10.1016/S0166-9834(00)80986-0
DO - 10.1016/S0166-9834(00)80986-0
M3 - Article
AN - SCOPUS:0023978012
VL - 38
SP - 61
EP - 69
JO - Applied Catalysis
JF - Applied Catalysis
SN - 0166-9834
IS - 1
ER -