用TG-DTG、EXCA、IR流动吸附技术和流动反应装置研究了高温和水蒸汽处理的P-ZSM-5的酸性及甲醇制低碳烯烃的反应性能。高温650—950℃处理,主要在强酸部位发生B→L酸转化;在650—800℃水蒸汽处理,除发生B→L酸转化外,在强酸部位更多的发生晶格脱铝,同时孔道收缩和比表面降低。甲醇转化率和乙烯产率随处理温度升高而下降,但丙烯和丁烯的产率却增加,乙烯的选择性主要依赖于强酸部位的数量。 The acidity of the P-ZSM-5 treated by high temperature and steam and the reactivity of the methanol-made light olefins were investigated by TG-DTG, EXCA, IR flow adsorption and flow reactor. Under the high temperature of 650-950 ℃, the B → L acid conversion takes place mainly at the strong acid sites. At 650-800 ℃ water vapor treatment, except for the B → L acid conversion, lattice de-alumination takes place in the strong acid sites, Shrinkage and specific surface area decreased. Methanol conversion and ethylene yield decrease with increasing treatment temperature, but yields of propylene and butenes increase, with ethylene selectivity largely dependent on the number of strong acid sites.