Study Of Impurities Effect, Reaction Conditions, And Particle Kinetics Of CO Catalytic Coupling To Dimethyl Oxalate

Compared with oil, there is more coal in storage in our country. As the reason that the demand of ethylene glycol is increasing year by year in China and large amount of ethylene glycol still relies on imports, it is meaningful to improve the production process and increase the yield of ethylene glycol. In this thesis, effect of impurities, technological conditions and particle dynamics of CO coupling reaction to prepare dimethyl oxalate are investigated.Effect of impurities includes effect of H2 and effect of methanol on the reaction. It is discovered that methanol which is the reactant of the regeneration reaction has no effect on the CO coupling reaction. But even a little amount of H2 existing in the reaction system, it will bring great influence to the coupling reaction. The selectivity and yield of dimethyl oxalate will decrease sharply. It is explained combined with the mechanism of the coupling reaction. And an allowable concentration is determined.Three aspects of reaction conditions are investigated in the thesis including temperature, space velocity and reactant ratio. And proper conditions are proposed.Particle dynamics of the coupling reactions is investigated by using internal circulation gradient less reactor.In summary, the thesis aims to reduce the energy consumption and optimize the technical process of the coupling reaction in industry by the investigation of the above three aspects.