A comparative study on methanol synthesis over Cu/ZnO/Al2O3 catalyst from different mixtures of CO/CO2/H2

فاقد چكيده فارسي

The production of methanol on freshly reduced CuO/ZnO/Al2O3 catalyst, was examined for three different compositions, pure CO and H2, pure CO2 and H2, mixture of CO, CO2 and H2 feed gases at 235 °C and 50 bara. The pure CO and H2 was used also at 245 °C. The fresh catalyst was loaded into a 10 mm inner diameter, fixed bed titanium reactor tube. After catalyst reduction, the feed gas was introduced into the reactor and the methanol synthesis reaction was carried out. To provide useful information related to reaction product assortment, online analysis of gas chromatography was performed. Equilibrium mole percentages of CO, CO2, H2, H2O and MeOH was calculated by Aspen HYSYS software. It was observed that, this catalyst convert synthesis gas, a mixture of CO, CO2 and H2 with the highest conversion into methanol in compare with the pure feed gases. The best catalyst selectivity has been attributed to the presence of CO2 in the feedstock. In the case of methanol production from pure CO the conversion increased with temperature from 235 to 245 ᵒC demonstrates that the reaction is kinetically controlled over this operation condition.