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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
Adsorbed ammonia and correspongding temperature-grammed desorption proved that the similar acidity in HZSM-5 zeolites with different Si/Al ratios, as well as revealed by the IR spectra of adsorbed pyridine in these zeolites. Howevwer, the adsorbed propane shows different interaction with the zeolites from the different density of the acid sites. It revealed that stronger interaction between the alkane interaction and zeolites when more acid sites presented in zeolites. The Nuclear Magnetic Resonance (NMR) spectra of the 1H DQ of zeolites and the 13C of adsorbed propane proved that the adjacency between Bronsted acid sites and the co-interaction of the active sites on one propane molecules.