MTG Process Simulation

MTG(methanol to gasoline) is one approach to convert coal into clean liquid fuels such as gasoline. For coal chemical industry blossomed in about ten years, chemical products such as the methanol or DME market getting close to saturated, coal making oil will be prior to China's coal chemical industry development in the following recent period. This dissertation focuses on the simulation and optimization of MTG technological process, which is expected to compare with mature FT synthesis craft, which will provide more information for the optimism of coal multigen system.MTG is a typical complex catalytic reaction system with a broad distribution of hydrocarbon products, which limited the process simulation. In this dissertation, the reaction mechanism and experiment data reported in the literature were analyzed, and a lumped reaction kinetic model was founded to present the methanol to gasoline reaction module. Matlab program using fourth-order Runge-Kutta algorithm calculates the influences of temperature or pressure on the products distribution. Performance parameters were optimized at a temperature of 380℃with a pressure of 2MPa.Based on the above calculations and the reaction module established, a two-step MTG fixed bed process was designed and simulated by Aspen Plus flow sheet simulator. The material balance and energy balance were calculated at each operation unit of the system. The simulation results is very close to the pilot experiment data, which can be used to guide the actual production.