Olefin Synthesis from Dimethyl Ether in the Presence of a Hydrothermally Treated Mg–HZSM-5/Al2O3 Catalyst: Effect of Reaction Conditions on the Product Composition and Ratio

Resumo

Systematic studies of olefin synthesis from dimethyl ether (DME) in the presence of a hydrothermally treated HZSM-5 zeolite catalyst modified with magnesium have been conducted. Dependences of DME conversion, product yield and selectivity, and lower olefin ratio on space time in the temperature range of 320–360°C have been analyzed. The type of the resulting products has been determined, and assumptions about the reaction chemistry have been made to reveal the role of methylation and hydrogen-transfer reactions in the products formation.