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Minimizing CO2 formation in Ir-catalyzed methanol carbonylation process
, Article Procedia Engineering ; Volume 42 , 2012 , Pages 1179-1188 ; Hosseinpour, V ; Sharif University of Technology
2012
Abstract
The effect of process parameters (temperature, pressure, iridium, ruthenium, methyl iodide, methyl acetate, and water concentrations) on CO2 formation and their interactions on methanol carbonylation were studied. The empirical relations for CO2 were developed. The ranking of the influence of the main effects on the CO2 formation was in the order, i.e., pressure > methyl iodide > iridium > water > temperature > methyl acetate > ruthenium. The results between the actual and predicted values were in good agreement. This is an abstract of a paper presented at the CHISA 2012 - 20th International Congress of Chemical and Process Engineering and PRES 2012 - 15th Conference PRES (Prague, Czech...
Minimizing CO2 formation in Ir-catalyzed methanol carbonylation process
, Article 20th International Congress of Chemical and Process Engineering, CHISA 2012, Prague, 25 August 2012 through 29 August 2012 ; 2012 , Pages 1179-1188 ; 18777058 (ISSN) ; Hosseinpour, V ; Sharif University of Technology
2012
Abstract
Acetic acid is one of the most important petrochemical products. Carbonylation of methanol in homogenous phase is one of the major routes for production of acetic acid. Amongst group VIII metal catalysts used in this process iridium has displayed the best capabilities. To investigate effect of operating parameters like: temperature, pressure, methyl iodide, methyl acetate, iridium, ruthenium, and water concentrations on the carbon dioxide formation, experimental design for this system based upon central composite design (CCD) was utilized. Statistical carbon dioxide formation equation developed by this method contained individual, interactions and curvature effects of parameters on the...
Fischer-tropsch synthesis: development of kinetic expression for a sol-gel Fe-Ni/Al 2O 3 catalyst
, Article Fuel Processing Technology ; Volume 97 , May , 2012 , Pages 130-139 ; 03783820 (ISSN) ; Fazlollahi, F ; Atashi, H ; Mirzaei, A. A ; Hosseinpour, V ; Sharif University of Technology
2012
Abstract
In this experimental study, a kinetic model has been developed for Fischer-Tropsch synthesis reactions by using sol-gel technique and Fe/Ni/Al 2O 3 as the catalyst (40% Fe/60% Ni/40 wt.%Al 2O 3) in a differential fixed-bed micro reactor assuming no internal or external diffusion. Operating conditions of the reactor were as follows: total pressure 1-12 atm; Temperature 220-260 °C; H 2/CO feed ratio 1.5-2; gas hourly space velocity 2100-7000 cm 3(STP)/h/ g cat and conversions of 6-37% of hydrogen and 7-21% of carbon monoxide. Mass transfer limitations were investigated by changing synthesis gas velocity in reactors which differ in size. Based on the hypothesis that water inhibits the intrinsic...