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基于27Al MAS NMR研究T位点分布的Beta沸石反应性评估
研究人员通过调控氟化物介质中H2 O/SiO2 比例(3.6-9.6),合成了一系列结构特性相似但铝原子T位点分布不同的Beta沸石模型催化剂。结合27Al MAS NMR和NH3 -TPD技术,发现高H2 O/SiO2 样品中T6+T7(58.6 ppm)和T3+T4(59.8 ppm)位点占比增加,其强酸位点数量与甲苯歧化反应 ...
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