对合成得到的一系列不同硅铝比的ZSM-5分子筛作了性能的考察和比较.用吡啶连续中毒法测定了表面酸中心密度随硅铝比变化的规律;用正己烷裂解反应作为固体表面酸中心催化作用的测试反应,对本系列样品作了比较:用FT红外光谱仪测定了本系列样品在中红外区骨架振动的红外光谱,经过与氢型丝光沸石分子筛(以HM表示)、氢Y型分子筛(以HY表示)及结晶SiO_2红外光谱的比较,提出了ZSM-5分子筛的1224～1233厘米~(-1)吸收带为五元环结构的特征谱带. A series of ZSM-5 zeolites with different Si / Al ratios were synthesized and characterized.The continuous density of pyridine was used to determine the change of surface acid density as a function of Si / Al ratio. The n-hexane cracking reaction was used as solid surface The reaction of the catalytic reaction in the acid center was compared with that in the series of samples. The infrared spectra of the samples in the mid-infrared region were measured by FT-IR spectroscopy. The results were compared with the hydrogen-type mordenite molecular sieve (HM) Molecular sieves (HY) and crystalline SiO_2 infrared spectra comparison proposed ZSM-5 molecular sieve 1224 ~ 1233 cm -1 absorption band characteristics of the five-membered ring structure.