基于固体核磁共振技术的固体酸结构、酸性及活性分析

[an error occurred while processing this directive]

杨文杰,黄骏*(

)

Analysis of Local Structure, Acidic Property and Activity of Solid Acids by Solid-State Nuclear Magnetic Resonance Spectroscopy

Wen-jie YANG,Jun HUANG*(

)

图3. 固体核磁共振用于表征表面酸性位点.(a)脱水的H-ZSM-5沸石在室温下的¹H魔角旋转固体核磁共振谱.(b)沸石Y脱铝程度分别为ⅰ) 5%、ⅱ) 10%、ⅲ) 15%、ⅳ) 20%，温度在373 K条件下的²⁷Al魔角旋转固体核磁共振谱^{[32, 43]}

Fig.3. SSNMR for identification of surface acid sites. (a) ¹H MAS SSNMR spectra for dehydrated H-ZSM-5 zeolites at room temperature. (b) ²⁷Al MAS SSNMR spectra of zeolites Y dealuminated at ⅰ) 5%, ⅱ) 10%, ⅲ) 15%, ⅳ) 20% at 373 K^{[32, 43]}