ZnO-CuO/ZSM-5 catalyst is prepared via coprecipitation impregnation method with ZSM-5 molecular sieve as the carrier,and characterized by means of XRF,XRD,XPS,BET,SEM,TEM,NH3-TPD and CO2-TPD.The influences of ZnO-CuO/ZSM-5 catalyst on the cycloaddition reaction between propylene oxide and carbon dioxide are investigated without the existence of solvent and promoter.It is indicated that the catalytic activity reaches the highest with a propylene oxide conversion of 81.64％,and a propylene carbonate selectivity of 90.11％when reaction temperature is 130℃,carbon dioxide pressure is 3 MPa,reaction time is 10 h,and the dosage of catalyst is 4％of the mass of propylene oxide.The catalyst remains good catalytic performance after having been recycled for 5 times.
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