Effects of Sn on the catalytic performance for one step syngas to DME in slurry reactor

Abstract

A series of Sn-modified CuZnAlSi slurry catalysts were prepared by the complete liquid phase method to perform the synthesis of dimethyl ether (DME) from syngas. The catalysts were characterized by XRD, TEM, H₂-TPR, N₂-adsorption, NH₃-TPD and XPS. The results showed that the slurry catalysts with a suitable amount of Sn significantly suppressed the water gas shift reaction and enhanced the selectivity of DME. The introduction of Sn may improve the Cu dispersion and modulate the acid property, which can increase CO conversion and suppress the formation of hydrocarbons, respectively. The optimized bifunctional catalyst performed 53.47% CO conversion with 82.12% DME selectivity.