Development of a new size-control method for nano-crystalline zeolite and its rational design as a catalyst

本研究的主要目的是实现分子筛晶体的尺寸控制合成，并发展纳米分子筛催化剂的设计方法。合成了MFI、TON、莫尔比（MOR）、H2O、FAU和MTW等不同类型的分子筛，并成功地控制了它们的晶粒尺寸。特别是在MFI-、莫尔-、MTW-、TON-型分子筛中，得到了粒径小于100 nm的纳米晶分子筛和粒径大于1000 nm的大晶分子筛。结果表明，TON分子筛具有较高的丙烯醛产率（80%以上），MFI和MTW分子筛可选择性地合成2，6-DMN。此外，沸石的晶体尺寸影响产物选择性以及催化剂稳定性，其值通过应用纳米结晶沸石作为催化剂而显著改善。

Main objective of this research is a size-controlled synthesis for zeolite crystal and a development of design method for nano-zeolite catalyst. Various types of zeolites (MFI, TON, MOR, BEA, FAU and MTW) were synthesized and their crystal sizes could be successfully controlled. Especially, in MFI-，MOR-，MTW-，TON-type zeolites, the nano-crystalline zeolites with the size below 100 nm and macro-crystalline zeolite with the size above 1000 nm were obtained.Acrolein production from glycerol and 2,6-dimethyl naphthalene (2,6-DMN) production from 2-methyl naphthalene were conducted using zeolite catalysts. It is found that TON zeolite exhibits a high yield of acrolein above 80 % and that 2,6-DMN is selectively produced using MFI and MTW zeolites. Moreover, the crystal sizes of zeolite affect the product selectivity as well as the catalyst stability, the values of which are drastically improved by applying the nano-crystalline zeolite as a catalyst.