HZSM-5/SAPO-34复合分子筛催化剂上乙醇制丙烯：SAPO-34含量的影响

Effects of SAPO-34 content on the properties and reactivity of HZSM-5/SAPO-34 composite catalyst for ethanol conversion to propylene were investigated by nitrogen isothermal adsorption-desorption, powder X-ray diffraction, amomina temperature-programmed desorption and catalytic test. The results show, the content of SAPO-34 affected the cncentration and distribution of acid sites, which in turn determined the reactivity of HZSM-5/SAPO-34 catalyst. It is necessary that the catalyst has the moderate concentration and distribution of acid sites for achieving the high propylene yield.