Simulation On The Synthesis Process Of Dimethyl Carbonate By Gas-phase Oxidative Carbonylation

Dimethyl carbonate(DMC) is an environmentally benign chemical that can be synthesized by many methods. The method of methanol gas-phase oxidative carbonylation has many advantages, such as process simplify, high yield, low cost, less pollution and so on. Compared to liquid-phase methods and indirect gas-phase methods, a direct gas-phase process can avoid the problems of separating catalyst and using toxic gas NO. So the process is expected to be used in industry in the near future.Nowadays, the synthesis process of dimethyl carbonate by gas-phase oxidative carbonylation from methanol is at the stage of extensive research and development. So in this thesis, a synthesis process of dimethyl carbonate by gas-phase oxidative carbonylation from methanol was studied in detail. The process composed of reaction and separation section was proposed. The simulator– ASPEN PLUS was used to simulate and calculate the whole process. The important operation parameters and all stream data of designed processes were obtained by simulation and optimization for the development and application of synthesis process as the theoretical principle. The studies of this thesis mainly included the following aspects:1. Process 1, process2 and process3 were designed and optimized for synthesis process of dimethyl carbonate by gas-phase oxidative carbonylation from methanol for the difference of methanol conversion. The flow charts and the streams data tables were shown in appendix.2. The NRTL equation for activity coefficient was chose to as the equation of process calculation by comparing the experimental values from literatures and calculated values from ASPEN PLUS. The non-condensable gas, such as N₂, O₂, CO and CO₂, would be appeared simulation calculation as the Henry components.3. The whole process included three sections. The first was the reaction, and...