Effect of component of bi-functional catalysts on one-step synthesis of dimethyl ether

Bi-functional catalysts were prepared by dry grinding of different components of catalysts for methanol synthesis and methanol dehydration.Their catalytic activity were evaluated with a high-pressure fixed-bed reactor.Results indicated that JC207 was a good catalyst for synthesis of methanol.Its optimum ratio was 20%in bi-functional catalyst.Zeolite was a good catalyst for methanol dehydration.Its optimum ratio was 80%in bi-functional catalyst.Stability test and XRD analysis of bi-functional catalyst confirmed that the crystalline phase of catalyst did not change,and the structure of catalyst remained stable.