The conversion of methanol to dimethyl ether (DME) has been carried out over γ-alumina silica-alumina, and modified γ-alumina catalysts. Especially, the water effect has been investigated on purpose to develop a suitable catalyst for one-step synthesis of DME from CO2 hydrogenation. The γ-Al2O3 modified with 1 wt% silica is more active and less deactivated by water than unmodified one. CO2 has no effect on catalytic dehydration of methanol to DME.
Bibliographical noteFunding Information:
The financial support to this work by the National Petrochemical Company (NPC), Iran and Haldor Topsøe A/S (HTAS), Denmark as joint research activity whose aid is gratefully acknowledged. The authors would like to thank HTAS employees of Syngas/Chemicals Technology and Analysis Divisions for valuable discussions and their collaboration at catalyst characterization by different methods.
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