Morphological modification of zeolite crystals in the presence of inorganic salts and through the synthesis conditions

本项目旨在研究沸石合成过程中无机盐的存在以及反应条件对沸石晶体形态的影响。该项目的重点是通过与晶体学孪晶结构的共生形成层状晶体形态。这种在一个方向上的晶体尺寸的减少是一个有前途的策略，以提高沸石的催化性能。因此，该项目被细分为3个主要部分：首先，合成参数之间的定量相关性，共生沸石结构的形成速率和所得的晶体形态将被确定为FAU（X）/EMT共生系统的例子。研究结果将应用于FAU（Y）/EMT和MFI/MEL型沸石在不存在有机形态改性剂的情况下的形态改性。第三部分研究了沸石分子筛的形貌修饰，特别是不同晶层厚度对液相催化性能的影响。

This proposed project is dedicated to investigating the influence of the presence of inorganic salts as well as reaction conditions during zeolite synthesis on the crystal morphology of the obtained zeolites. Focus of the project is the formation of layer-like crystal morphologies through intergrowth with crystallographic twin structures. Such reduction of the crystal dimension in one direction is a promising strategy to upgrade the catalytic performance of zeolites. Accordingly, the project is subdivided into 3 main parts: First, quantitative correlations between synthesis parameters, formation rate of the intergrowing zeolite structures and the resulting crystal morphologies will be identified for the example of the FAU(X)/EMT intergrowth system. The findings will then be applied for the morphological modification of the zeolite types FAU(Y)/EMT and MFI/MEL in the absence of organic morphology modifiers. In the third part, the effect of the morphological modification, especially of different zeolite crystal thickness, in liquid phase catalysis will be investigated.