采用原位流动红外技术测试了ＨＺＳＭ－５分子筛原粉、粘合剂氧化铝和工业芳构化催化剂中Ｂ酸及Ｌ酸的酸度，并研究了正己烷芳构化的机理及催化剂结焦失活问题。试验发现分子筛原粉以Ｂ酸为主，氧化铝以Ｌ酸为主，催化剂中Ｂ酸Ｌ酸各占一定比例；结焦后的催化剂Ｂ酸及较强Ｌ酸下降比较明显；正己烷在芳闷化过程中生成很多物种，有环己烯、取代苯等。 In-situ flow infrared technology was used to test the acidity of B acid and L acid in HZSM-5 zeolite, binder alumina and industrial aromatization catalyst. The mechanism of n-hexane aromatization and coking deactivation problem. It was found that the B zeolite was the main raw material of molecular sieve and the L acid was the main alumina. The content of Brønsted acid and L acid in the catalyst each accounted for a certain proportion. The densities of Brønsted acid and stronger L acid were more obvious after coking. In the process of generating many species, cyclohexene, substituted benzene and so on.