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Co-templated synthesis of zeolites for applications in adsorption and catalysis

用于吸附和催化应用的沸石共模板合成

基本信息

批准号：
1947940
负责人：
金额：
--
依托单位：
University of St Andrews
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2017
资助国家：
英国
起止时间：
2017 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1947940
关键词：
Co templated synthesis zeolites applications

项目摘要

Zeolites are microporous aluminosilicates with applications in gas adsorption and catalysis, prepared hydrothermally using inorganic or organic cations to direct or template the framework crystallisation. This project aims to develop co-templating routes in which inorganic and organic cations are used together to prepare zeolites with new structures or compositions. The work will include the characterisation of a series of flexible (RHO-type) zeolites, prepared using different metal and tetraethylammonium cations that show highly selective gas adsorption. Using the principles derived from this, other zeolite syntheses will then be devised using combinations of cations and other small organics to give small pore low Si/Al zeolites valuable in gas separations, including merlinoite and phillipsite.The structures will be measured in situ during gas separations. Elliott Bruce, as the best MChem student graduating this year, is uniquely placed to perform these complex analyses. Existing in situ synchrotron X-ray powder diffraction data is available on the complex RHO family structures ZSM-25 and PST-20 with and without adsorbed carbon dioxide and initial structural studies will involve their refinement using the TOPAS program, required for such complex structures. This will enable the determination of cation locations and so help understand, in combination with computational studies, their selective adsorption behaviour for a range of industrially relevant separations. Additionally, further X-ray and neutron diffraction data will be collected on zeolite Rho itself, for mixed cation systems that have been found to be of interest for industrial separations with a collaborating industrial company.Further, co-templating routes to zeolites with high Si/Al required for stable auto-exhaust catalysts will be devised. Several promising materials have been prepared using highly expensive organic templates. Here, the aim is to use combinations of inorganic and less-expensive organic templates to make such catalysts more accessible, making use of computational modelling for template design. This is of great interest to Johnson Matthey, so the project will be conducted in collaboration with them, giving Elliott insight into industrial catalytic chemistry and access to their extensive facilities at Billingham.

沸石是一种微孔铝硅酸盐，应用于气体吸附和催化，用水热法制备，使用无机或有机阳离子来指导或模板框架结晶。该项目旨在开发共模板路线，其中无机和有机阳离子一起使用，以制备具有新结构或成分的沸石。这项工作将包括一系列柔性（rho型）沸石的表征，这些沸石是用不同的金属和四乙基铵阳离子制备的，具有高度选择性的气体吸附。利用由此得出的原理，其他的沸石合成将被设计成使用阳离子和其他小有机物的组合，以获得在气体分离中有价值的小孔低硅/铝沸石，包括merlinoite和phillipsite。这些结构将在气体分离时就地测量。作为今年毕业的最优秀的化学硕士学生，艾略特·布鲁斯（Elliott Bruce）在执行这些复杂分析方面具有独特的优势。现有的原位同步加速器x射线粉末衍射数据可用于复杂的RHO家族结构ZSM-25和PST-20，无论是否吸附二氧化碳，初始结构研究将涉及使用TOPAS程序对其进行改进，这是此类复杂结构所需的。这将使阳离子位置的确定，从而有助于理解，结合计算研究，他们的选择性吸附行为的一系列工业相关的分离。此外，将进一步收集沸石Rho本身的x射线和中子衍射数据，用于与一家合作工业公司合作的工业分离中发现的混合阳离子系统。此外，将设计出具有高硅铝比的分子筛共模板路线，以制备稳定的汽车尾气催化剂。使用昂贵的有机模板制备了几种有前途的材料。在这里，目标是使用无机和更便宜的有机模板的组合，使这些催化剂更容易获得，利用模板设计的计算模型。庄信万丰对此非常感兴趣，因此该项目将与庄信万丰合作进行，使Elliott能够深入了解工业催化化学，并使用庄信万丰在比林汉姆的广泛设施。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Understanding the Anion-Templated, OSDA-Free, Interzeolite Conversion Synthesis of High Silica Zeolite ZK-5.

DOI：
10.1002/chem.202201689
发表时间：
2022-10-07
期刊：
CHEMISTRY-A EUROPEAN JOURNAL
影响因子：
4.3
作者：
Lozinska, Magdalena M.;Bruce, Elliott L.;Mattock, James;Chitac, Ruxandra G.;Cox, Paul A.;Turrina, Alessandro;Wright, Paul A.
通讯作者：
Wright, Paul A.

Understanding CO2 adsorption in a flexible zeolite through a combination of structural, kinetic and modelling techniques