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M. Arsalanfar,A.A. Mirzaei,H.R. Bozorgzadeh 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.2
The MgO supported Fe–Co–Mn catalyst was prepared using different preparation methods including coprecipitation,sol–gel, incipient wetness impregnation and dry impregnation. All of these catalysts were tested for Fischer–Tropsch synthesis under the same operational conditions of T = 300 8C, P = 1 bar, H2/CO = 2/1 and GHSV = 4500 h1. It was found that the co-precipitated catalyst has shown the better catalytic performance for CO hydrogenation. The effect of the preparation method on different surface reaction rates was also investigated and it was found that the preparation methods can influenced the rates of different surface reaction rates. Catalyst characterization was carried out using XRD, SEM, BET,TPR, TGA and DSC.
M. Arsalanfar,A.A. Mirzaei,H.R. Bozorgzadeh,A. Samimi,R. Ghobadi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Co-precipitated Fe–Co–Mn catalysts were tested for production of light olefins via Fischer–Tropsch synthesis. The effects of different supports such as Al2O3, SiO2, TiO2 and MgO and subsequently the effect of optimum support loading and also the effect of different promoters including Li, Cs, K, Rb and Ru on the catalytic performance and structure of Fe–Co–Mn catalyst were investigated. It was found that the Fe–Co–Mn catalyst containing 10 wt% MgO has shown the better catalytic performance. Characterization of the catalyst precursors and calcined samples was carried out using XRD, SEM, EDS, BET, TPR, TGA and DSC.
M. Arsalanfar,H.R. Bozorgzadeh,H. Atashi,A.A. Mirzaei 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.6
The Fe–Co–Mn/MgO catalyst was prepared using co-precipitation procedure; effects of reaction conditions on the catalytic performance for Fischer–Tropsch synthesis have been investigated. Experiments were carried out under a wide range of reaction conditions including reaction temperature of 473–673 K, pressure of 1–10 bar, H2/CO feed molar ratio of 1–4 and space velocity of 3150–7200 h-1. We also reported further results regarding the effect of various operational conditions on different surface reaction rates. It was found that the optimum operational conditions are H2/CO = 2/1, GHSV = 4500 h-1, T = 573 K and P = 1 bar. Characterization of both precursor and calcined catalysts was carried out using XRD, SEM, BET and TPR.
Kinetic study of CO hydrogenation over co-precipitated iron–nickel catalyst
Ali A. Mirzaei,Rouhoullah M. Kiai,Hossein Atashi,Maryam Arsalanfar,Sara Shahriari 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.4
The kinetic of the Fischer–Tropsch synthesis over a Fe–Ni/Al2O3 catalyst was investigated in a fixed bed micro reactor. Experimental conditions were varied as follow: reaction pressure 2–10 bar, H2/CO feed ratio of 2/1 and space velocity of 96–450 cm3(STP)/h/gramcatalyst at the temperature range 523–573 K. On the basis of carbide-enol mechanism and Langmuir–Hinshelwood–Hougen–Watson (LHHW) type rate equations, seventeen kinetic expressions for CO consumption were tested and interaction between adsorption HCO and dissociated adsorption hydrogen as the controlling step gave the most plausible kinetic model. The activation energy was 46.5 kJ/mole for optimal kinetic model.
Kinetic study of CO hydrogenation on the MgO supported Fe–Co–Mn sol–gel catalyst
A.A. Mirzaei,A. Pourdolat,M. Arsalanfar,H. Atashi,A.R. Samimi 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4
The kinetic of the Fischer–Tropsch synthesis over the MgO supported Fe–Co–Mn catalyst prepared using sol–gel procedure, was investigated in a fixed bed micro-reactor. Experimental conditions were varied as follow: reaction pressure 5–20 bar, reaction temperature 220–250 8C, H2/CO feed molar ratio of 0.67–2and space velocity range of 2400–3600 h1. 18 models according to the Langmuir–Hinshelwood–Hougen–Watson (LHHW) type rate equation were derived, and the reaction rate is fitted fairly well by one kinetic expressions based on LHWW mechanism. The kinetic parameters were estimated with nonlinear regression method. The activation energy was obtained 110.9 kJ/mol for the best-fitted model.