EU-1分子筛的合成及其在正己烷异构化反应中的催化性能

在不同硅铝比(n_SiO2/n_Al2O3)的合成凝胶(含纯硅凝胶)中引入晶种，合成了纯相的EU-1分子筛。研究了铝源、模板剂和晶种添加量对EU-1分子筛的结晶度、形貌尺寸等的影响；重点研究了不同硅铝比对样品结晶度、晶粒尺寸、酸性、比表面积和孔容等的影响。将合成结果绘制成了纯相EU-1分子筛的合成条件三元图，从三元图可看出，晶种法可显著扩大纯相EU-1分子筛的合成区域。将Pt/H-EU-1用于正己烷异构化反应，结果表明，该催化剂具有优异的正己烷异构化活性及稳定性，对异构烷烃有较高的选择性。

Synthesis and catalytic activity in n-hexane isomerization of EU-1 zeolite

In this study, a series of pure-phase EU-1 zeolites were synthesized by introducing seeds into a series of synthetic gels with different SiO₂/Al₂O₃ ratios (n_SiO2/n_Al2O3, containing pure silicon gel). The effect of the aluminum source, the amount of template and seed on the crystallinity, and the morphology and size of EU-1 zeolite were inves-tigated. The effects of different SiO₂/Al₂O₃ ratios synthesis systems on the crystallinity, crystal size, acidic property, specific surface area, and pore volume of the samples were emphatically studied. Pure phase EU-1 was synthesized not only in a high-silicon system but also in an aluminum-free system by the seeding method. The results were plot-ted into a ternary plot of the synthesis conditions of pure phase EU-1 zeolite. It is obvious from the ternary plot that the crystal seed method can significantly expand the synthesis region of pure phase EU-1 zeolite. Pt/H-EU-1 was applied to catalyze the n-hexane isomerization reaction. The results showed that the catalyst had excellent n-hexane isomerization activity and stability, and high selectivity to isoparaffins.