【摘要】 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SiO₂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.更多还原

【Abstract】 A series of ZSM-5 zeolites of different silica to alumina ratio （SiO₂/Al₂O₃）were prepared and their properties were studied and compared. The correlation between surface acid center density and the SiO₂/Al₂O₃ ratio was determined by the method of continuous poisoning with pyridine. Using the cracking of n-hexane as the test reaction for the catalysis of surface acid centers, these ZSM-5 samples were compared with one another. The framwork vibration of this series of zeolites in the mid-infrared region was studied, using a FT-IR-spectrometer. Comparing these IR spectra with those of the HM and HY zeolites and the crystal SiO₂, it was suggested that the adscrtion band at 1224-1233cm^-1 was attributed to the characteristic five ring structure of the tetrahedra.更多还原