The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Kaoru Fujimoto - One of the best experts on this subject based on the ideXlab platform.
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supercritical phase fischer tropsch synthesis Catalyst Pore size effect
Aiche Journal, 1992Co-Authors: Li Fan, Kohshiroh Yokota, Kaoru FujimotoAbstract:The Fischer-Tropsch synthesis reaction was conducted in a supercritical fluid medium using a fixed-bed reactor. Tailor-made Catalyst supports which had sharp Pore diameter distributions were prepared by the pH swing method. The relationships between the Catalyst Pore structure and the catalytic activity or the product distribution were studied. The influence of the Catalyst Pore size on the mass transfer of reactants and products was also characterized. The Catalyst Pore size affected not only catalytic activity but also product selectivity. The diffusion of reactants inside the Catalyst pellets in the supercritical fluid media was simulated and the effects of Catalyst Pore size and Catalyst particle size on catalytic performances were consistent with simulation results.
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Supercritical phase fischer‐tropsch synthesis: Catalyst Pore‐size effect
AIChE Journal, 1992Co-Authors: Li Fan, Kohshiroh Yokota, Kaoru FujimotoAbstract:The Fischer-Tropsch synthesis reaction was conducted in a supercritical fluid medium using a fixed-bed reactor. Tailor-made Catalyst supports which had sharp Pore diameter distributions were prepared by the pH swing method. The relationships between the Catalyst Pore structure and the catalytic activity or the product distribution were studied. The influence of the Catalyst Pore size on the mass transfer of reactants and products was also characterized. The Catalyst Pore size affected not only catalytic activity but also product selectivity. The diffusion of reactants inside the Catalyst pellets in the supercritical fluid media was simulated and the effects of Catalyst Pore size and Catalyst particle size on catalytic performances were consistent with simulation results.
Li Fan - One of the best experts on this subject based on the ideXlab platform.
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supercritical phase fischer tropsch synthesis Catalyst Pore size effect
Aiche Journal, 1992Co-Authors: Li Fan, Kohshiroh Yokota, Kaoru FujimotoAbstract:The Fischer-Tropsch synthesis reaction was conducted in a supercritical fluid medium using a fixed-bed reactor. Tailor-made Catalyst supports which had sharp Pore diameter distributions were prepared by the pH swing method. The relationships between the Catalyst Pore structure and the catalytic activity or the product distribution were studied. The influence of the Catalyst Pore size on the mass transfer of reactants and products was also characterized. The Catalyst Pore size affected not only catalytic activity but also product selectivity. The diffusion of reactants inside the Catalyst pellets in the supercritical fluid media was simulated and the effects of Catalyst Pore size and Catalyst particle size on catalytic performances were consistent with simulation results.
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Supercritical phase fischer‐tropsch synthesis: Catalyst Pore‐size effect
AIChE Journal, 1992Co-Authors: Li Fan, Kohshiroh Yokota, Kaoru FujimotoAbstract:The Fischer-Tropsch synthesis reaction was conducted in a supercritical fluid medium using a fixed-bed reactor. Tailor-made Catalyst supports which had sharp Pore diameter distributions were prepared by the pH swing method. The relationships between the Catalyst Pore structure and the catalytic activity or the product distribution were studied. The influence of the Catalyst Pore size on the mass transfer of reactants and products was also characterized. The Catalyst Pore size affected not only catalytic activity but also product selectivity. The diffusion of reactants inside the Catalyst pellets in the supercritical fluid media was simulated and the effects of Catalyst Pore size and Catalyst particle size on catalytic performances were consistent with simulation results.
Kohshiroh Yokota - One of the best experts on this subject based on the ideXlab platform.
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supercritical phase fischer tropsch synthesis Catalyst Pore size effect
Aiche Journal, 1992Co-Authors: Li Fan, Kohshiroh Yokota, Kaoru FujimotoAbstract:The Fischer-Tropsch synthesis reaction was conducted in a supercritical fluid medium using a fixed-bed reactor. Tailor-made Catalyst supports which had sharp Pore diameter distributions were prepared by the pH swing method. The relationships between the Catalyst Pore structure and the catalytic activity or the product distribution were studied. The influence of the Catalyst Pore size on the mass transfer of reactants and products was also characterized. The Catalyst Pore size affected not only catalytic activity but also product selectivity. The diffusion of reactants inside the Catalyst pellets in the supercritical fluid media was simulated and the effects of Catalyst Pore size and Catalyst particle size on catalytic performances were consistent with simulation results.
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Supercritical phase fischer‐tropsch synthesis: Catalyst Pore‐size effect
AIChE Journal, 1992Co-Authors: Li Fan, Kohshiroh Yokota, Kaoru FujimotoAbstract:The Fischer-Tropsch synthesis reaction was conducted in a supercritical fluid medium using a fixed-bed reactor. Tailor-made Catalyst supports which had sharp Pore diameter distributions were prepared by the pH swing method. The relationships between the Catalyst Pore structure and the catalytic activity or the product distribution were studied. The influence of the Catalyst Pore size on the mass transfer of reactants and products was also characterized. The Catalyst Pore size affected not only catalytic activity but also product selectivity. The diffusion of reactants inside the Catalyst pellets in the supercritical fluid media was simulated and the effects of Catalyst Pore size and Catalyst particle size on catalytic performances were consistent with simulation results.
Anders Holmen - One of the best experts on this subject based on the ideXlab platform.
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fischer tropsch synthesis over γ alumina supported cobalt Catalysts effect of support variables
Journal of Catalysis, 2007Co-Authors: Oyvind Borg, Sigrid Eri, Edd A Blekkan, Solvi Storsaeter, Hanne Wigum, Erling Rytter, Anders HolmenAbstract:Abstract A systematic study of the effect of γ -Al 2 O 3 support variables on Fischer–Tropsch synthesis activity and selectivity was carried out at industrially relevant conditions ( T = 483 K , P = 20 bar , H 2 / CO = 2.1 ). A total of 13 Catalysts were prepared by incipient wetness impregnation of γ -Al 2 O 3 supports of varying Pore characteristics and chemical purities with aqueous solutions containing the required amounts of cobalt and rhenium precursor to give nominal loadings of 20 and 0.5 wt%, respectively. The Catalysts were analysed for cobalt, rhenium, nitrogen, and sodium and characterised by nitrogen adsorption/desorption, mercury intrusion, X-ray diffraction, hydrogen chemisorption, temperature-programmed reduction, and oxygen titration. The size of the Co 3 O 4 cobalt particles was controlled by the support Pore size, with small particles formed in narrow Pores and large particles formed in wide Pores. The degree of reduction increased with increasing Catalyst Pore size and Co 3 O 4 particle size. The Catalysts contained different amounts of sodium (20–113 ppm) and the site-time yield decreased with increasing sodium content. Positive correlations were found between cobalt particle size and C 5+ selectivity and between Catalyst Pore size and C 5+ selectivity. The results indicate that the C 5+ selectivity is controlled by the size and appearance of cobalt particles.
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Fischer–Tropsch synthesis over γ-alumina-supported cobalt Catalysts: Effect of support variables
Journal of Catalysis, 2007Co-Authors: Oyvind Borg, Sigrid Eri, Edd A Blekkan, Solvi Storsaeter, Hanne Wigum, Erling Rytter, Anders HolmenAbstract:Abstract A systematic study of the effect of γ -Al 2 O 3 support variables on Fischer–Tropsch synthesis activity and selectivity was carried out at industrially relevant conditions ( T = 483 K , P = 20 bar , H 2 / CO = 2.1 ). A total of 13 Catalysts were prepared by incipient wetness impregnation of γ -Al 2 O 3 supports of varying Pore characteristics and chemical purities with aqueous solutions containing the required amounts of cobalt and rhenium precursor to give nominal loadings of 20 and 0.5 wt%, respectively. The Catalysts were analysed for cobalt, rhenium, nitrogen, and sodium and characterised by nitrogen adsorption/desorption, mercury intrusion, X-ray diffraction, hydrogen chemisorption, temperature-programmed reduction, and oxygen titration. The size of the Co 3 O 4 cobalt particles was controlled by the support Pore size, with small particles formed in narrow Pores and large particles formed in wide Pores. The degree of reduction increased with increasing Catalyst Pore size and Co 3 O 4 particle size. The Catalysts contained different amounts of sodium (20–113 ppm) and the site-time yield decreased with increasing sodium content. Positive correlations were found between cobalt particle size and C 5+ selectivity and between Catalyst Pore size and C 5+ selectivity. The results indicate that the C 5+ selectivity is controlled by the size and appearance of cobalt particles.
Dechen Song - One of the best experts on this subject based on the ideXlab platform.
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effect of Catalyst Pore size on the catalytic performance of silica supported cobalt fischer tropsch Catalysts
Journal of Molecular Catalysis A-chemical, 2006Co-Authors: Dechen SongAbstract:Abstract A series of cobalt Catalysts supported on silica with different Pore size were prepared by incipient wetness impregnation method. N 2 physisorption, XRD, H 2 -TPR, H 2 -TPD, DRIFTS and O 2 pulse reoxidation were used to characterize the Catalysts. The results showed that the Pore size of the support had a significant influence on the Co 3 O 4 crystallite diameter, Catalyst reducibility and Fischer–Tropsch activity. The larger Pore could cause the Co/SiO 2 to form larger Co 3 O 4 crystallite and decreased its dispersion. Catalysts with different Pore size showed different CO adsorption property. The Catalysts with Pore size of 6–10 nm displayed higher Fischer–Tropsch activity and higher C 5+ selectivity, due to the moderate particle size and moderate CO adsorption on the Catalysts.
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Effect of Catalyst Pore size on the catalytic performance of silica supported cobalt Fischer–Tropsch Catalysts
Journal of Molecular Catalysis A-chemical, 2006Co-Authors: Dechen SongAbstract:Abstract A series of cobalt Catalysts supported on silica with different Pore size were prepared by incipient wetness impregnation method. N 2 physisorption, XRD, H 2 -TPR, H 2 -TPD, DRIFTS and O 2 pulse reoxidation were used to characterize the Catalysts. The results showed that the Pore size of the support had a significant influence on the Co 3 O 4 crystallite diameter, Catalyst reducibility and Fischer–Tropsch activity. The larger Pore could cause the Co/SiO 2 to form larger Co 3 O 4 crystallite and decreased its dispersion. Catalysts with different Pore size showed different CO adsorption property. The Catalysts with Pore size of 6–10 nm displayed higher Fischer–Tropsch activity and higher C 5+ selectivity, due to the moderate particle size and moderate CO adsorption on the Catalysts.