Abstract

The paper reports the preparation of two series of nanosized (150–350 nm) ZSM-5 zeolite crystals with a Si/Al molar ratio of 70 to 144 by a template method. The prepared catalysts are distinctive in their mostly intercrystalline macroporosity and random architecture of transport channels formed as a result of the utilization of a high-molecular-weight template represented by suspended or powdered polystyrene particles about 250 nm in size. The crystallinity and the size and packing of the particles depend on the method of template introduction into a precursor mixture. The samples of both series were tested in an n-hexane cracking reaction, and the comparative assessment of their catalytic properties in terms of n-hexane conversion degree and selectivity for alkane, olefin, and isoalkane products is also summarized in the paper.

中文翻译：

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用于正己烷裂解工艺的纳米ZSM-5沸石晶体组成的大孔催化剂

摘要

该论文报道了通过模板法制备硅/铝摩尔比为70：144的两个系列的纳米级（150-350 nm）ZSM-5沸石晶体。所制备的催化剂的特征在于它们的主要是晶间大孔性和由于利用以约250nm尺寸的悬浮或粉末状聚苯乙烯颗粒为代表的高分子量模板而形成的传输通道的无规结构。颗粒的结晶度，尺寸和堆积取决于将模板引入前体混合物中的方法。两个系列的样品中的一个进行了测试Ñ正己烷裂化反应，和它们的催化性能的在以下方面的比较评估Ñ本文还总结了正己烷转化率和对烷烃，烯烃和异烷烃产物的选择性。