KINETIC REGULARITIES OF DIMETHYL ETHER TRANSFORMATION INTO 1,3-BUTADIENE IN THE PRESENCE OF ZnO/γAl2O3/Al CATALYST

First explored kinetic regularities of kinetic transformation of dimethyl ether (DME) into 1,3-butadiene on ZnO/gamma Al2O3/Al catalyst synthesized in terms of microwave thermic treating. Considered stoichiometric models of mechanism to comply with hypothesis of three equiprobable routes involving divinyl preparation by means of parallel transformation of primary product of the reaction - ethanol into acetaldehyde and ethylene and their subsequent interaction to produce 1,3-butadiene; by means of interaction of subsequently transforming DME formaldehyde and propylene, as as well as a route including a stage of aldol condensation of acetaldehyde. It found that a kinetic model of reaction on the basis of stoichiometric matrix of eight-routes mechanism where formation of 1,3-butadiene is preceded by interaction of acetaldehyde and ethylene is notable for the best repeatability with experimental data on DME transformation. Calculated kinetic parameters providing reliable process control.