The green synthesis process of dimethyl carbonate from CO2 and methanol was researched with thermodynamic calculation.The effects of reaction temperature and pressure on Gibbs free energy △rG,equilibrium constant K and equilibrium conversion rate C were studied in the range of 0.1-8.0 MPa and 293.15-473.15 K.Furthermore,the effects of temperatures and pressures on the reaction performance were investigated by using CeO2 as the catalyst at a fixed reaction pressure of 8.0 MPa or a reaction temperature of 413.15 K,and the obtained results were compared with the results of thermodynamic calculations.The results show that CeO2 gives a good performance in the range of 373.15-473.15 K,and the increase of reaction pressure can reduce △rG and increase K and C,promoting the reaction in the positive direction.In addition,thermodynamic calculations show that the reaction pressure displays a more significant effect on the equilibrium constant under the condition of lower reaction temperature with different reaction pressure,and provides a theoretical reference for the development of highly active catalytic materials to catalyze the efficient synthesis of dimethyl carbonate from CO2and methanol at lower temperatures.
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