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• W2040257785 abstract "The water–gas shift reaction occurs competitively to the main reaction of the Ir-catalysed methanol carbonylation process. To study the effect of seven factors including temperature, pressure, iridium, ruthenium, methyl iodide, methyl acetate and water concentrations on the formation of hydrogen and carbon dioxide as a result of the water–gas shift reaction and other side reactions in the carbonylation of methanol to acetic acid, the experimental design method combined with response surface methodology (RSM) was utilised. Central composite design at five levels (with α=1.63) was used to design experiments. A quadratic model that included the main and interaction effects of variables for H2 and CO2 formation was developed. For two responses, R2 was in reasonable agreement “Adj-R2”. Furthermore, statistical tests confirmed the accuracy and the precision of models developed in this research. For CO2 formation, pressure, iridium and methyl iodide concentrations and for H2 formation, water and iridium concentrations had the most pronounced effects. Optimum conditions to minimise H2 and CO2 and CH4 formation were determined as follows: temperature of 189 °C, pressure of 32.0 bar, iridium content of 859 ppm, ruthenium concentration of 528 ppm, methyl iodide content of 8.68 wt%, methyl acetate concentration of 23.9 wt% and water content of 6.49 wt%. Ultimately, an experiment at optimum conditions revealed satisfactory agreement between the experimental and predicted data." @default.
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• W2040257785 date "2011-10-01" @default.
• W2040257785 modified "2023-10-07" @default.
• W2040257785 title "A study of the water–gas shift reaction in Ru-promoted Ir-catalysed methanol carbonylation utilising experimental design methodology" @default.
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• W2040257785 doi "https://doi.org/10.1016/j.ces.2011.06.053" @default.
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