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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.
A. Mirvakili,F. Samimi,A. Jahanmiri 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
In thermal decomposition process, ammonium nitrate decomposition takes place in fluidized bed reactor (FR) and nitrogen oxide (NOx), as an undesirable product is produced in high temperatures. In this study, two novel configurations named membrane fluidized bed reactor (MFR) and free air membrane fluidized bed reactor (AMFR) is proposed to reduce NOx emission. Models predictions are validated by experimental data presented by Bhowmick et al. The results show 16% and 7% decrease in NOx concentration in AMFR and MFR respectively, compared with FR. Reduction of NOx emission and enhancement of ammonium nitrate conversion, demonstrate superiority of AMFR to previous configurations.
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.