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NMR STUDY OF MODIFIED HY MOLECULAR SIEVE
Release time:
2010-04-15
Li Wenli [1] Wang Yi [2][1] State Key Laboratory of Catalysis Foundation, Dalian Institute of Chemical Physics, Chinese Academy of Sciences [2] Department of Chemistry, Liaoning Normal University Abstract: The structure and acidity changes of HY molecular sieve before and after modification by MgO and SiO2 were studied by using MASNMR spectrum and matching with perfluorobutylamine selective adsorption. The structure determined by NMR showed that, the oxide modification led to obvious changes in the Si/Al of the molecular sieve framework, and the corresponding XRD results confirmed that the crystallinity of the molecular sieve modified by MgO and SiO2 increased by 6.9 and 15.4 respectively.
Keywords: HY molecular sieve NMR NMR modification molecular sieve acid center
Classification number: TQ424.25 O643.36
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