Effect of methanol dehydration component in hybrid catalyst for the direct synthesis of dimethyl ether from syngas;

Study on direct synthesis of dimethyl ether by hydrogenation of carbon dioxide in the slurry reactor——Effects of reaction conditions on the performance of magnesium modified hybrid catalyst

A series of HZSM-5 zeolites modified with various mass fractions of antimony oxide Sb2O3(0-30%) were prepared by solid state ion exchange method,and then physically mixed with an industrial methanol synthesis catalyst(XNC-98) to form a series of hybrid catalysts CuO-ZnO-Al2O3+Sb2O3/HZSM-5.

Direct synthesis of dimethyl carbinate catalyzed by supported Lewis acid-superbase bifunctional catalyst;

The global kinetics of directly synthesis of dimethyl ether(DME) from syngas over bifunctional catalyst mixed by methanol synthesis catalyst and dehydration catalyst was obtained.

A heterogeneous bifunctional catalyst was synthesized by incorporating chiral amine and acid groups into silica.

As the central part of technology,bifunctional catalysts consist of methanol synthesis catalytic component and methanol dehydration catalytic component.

Zirconium and boron are favorable additives to CuO -ZnO - Al2O3 -based bifunctional catalysts.

They were mixed with γ-Al_2O_3, H_3PO_4-γ-Al_2O_3, TiO_2-γ-Al_2O_3 and Hβ to prepare bi-functional catalysts.

And then a metal-solid superacid bi-functional catalyst was prepared for the purpo.

If the dimethyl ether (DME) is introducedas a co-feed gas to the methanol carbonylation reaction, the above problems may be diminishedsomewhat via the coupling reaction of DME hydrolysis and methanol carbonylation over abi-functional catalyst.