Effect of SrCO3 Additive on CuZnAl/HZSM-5 Catalyst Property for the Direct DME Synthesis

摘要

SrCO3 was formed and added as a carrier into copper-based catalyst (CuZnAl catalyst) prepared by hydrothermal method before the catalyst incorporates with HZSM-5. The CuZnAlSr catalyst was characterized by SEM, BET, XRD, IR, and activity-evaluation system in a fixed-bed tubular reactor equipped with chromatograph (GC). The conversion of CO2 reaches 30.30 %, and the overall yield of methanol and dimethyl ether is 27.80 %. Catalytic property as to CO2 conversion has only slight decrease even up to 150 h of reaction time. The addition of SrCO3 enhanced the activity of the catalyst through providing a tridimensional frame and electron transfer bridge.