Thermodynamic Analysis for the Synthesis of Dimethyl Carbonate by Vapor Phase Oxidation Carbonylation of Methanol and Dimethyl Ether

The standard heat of formation ,Gibbs free energy and heat capacity of dimethyl carbonate(DMC)were calculated by Benson's method of group contribution.The molar enthalpy changes of oxidation carbonylation of methanol and thehydrolysis of dimethyl ether were calculated.The molar enthalpy change of oxidation carbonylation of dimethyl ether was obtained according to the Hess's Law.The Gibbs free energies and the equilibrium constants of the three reactions were investigated to provide the thermodynamic basis for the synthesis of DMC by oxidation carbonylation of methanol and dimethyl ether.