Simulation Of Slurry Bubble Column Reactor And Process Of Dimethyl Ether Direct Synthesis From Syngas

In this paper, the reaction kinetics of dimethyl ether synthesis from syngas were studied and the experimental data was used to fit the kinetics.The mathematical model of slurry reactor was established to simulate the dimethyl ether synthesis from syngas, inert carrier backmixing and the influence of catalyst grain sedimentation was considered. The effect of the reaction pressure, temperature, space velocity and composition of the feed gas was discussed. The result showed that in different H2/CO conditions, CO conversion and DME selectivity increased with the temperature and pressure. In certain temperature and pressure conditions, the conversion of CO decreased with the increase of space velocity. Syngas with a certain amount of CO2 was benefit for CO conversion, increased the H2 concentration was conducive to the CO conversion and the dimethyl ether formation. Therefore, at the proper speed velocity, increased the reaction temperature, pressure, and the content of H2 feed gas appropriately was useful for the production.A process of annual output of 100,000 tons of dimethyl ether was established, include a reactor, absorber, pre-distillation column, DME distillation column, methanol recovery distillation column, calculated the operating conditions, the plate number and the purity of product flow to get optimum process operation. Annual output of 108,400 tons of DME, byproduct methanol 19,400 tons was obtained.