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Structure and transport characterisation of hierarchical porous solids

分级多孔固体的结构和输运表征

基本信息

批准号：
249197121
负责人：
Professor Dr. Rustem Valiullin
金额：
--
依托单位：
Felix-Bloch-Institut für Festkörperphysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/249197121?language=en
关键词：
Structure transport characterisation hierarchical porous

项目摘要

Porous materials with hierarchical organization of their pore spaces are attracting increasing attention due to favourable combination of their transport properties and chemical functionality. Although the synthesis routes of such materials have already been developed, better understanding of their structure and, especially, structure-dynamics relationships is still required to optimize their use in practical applications. The main objectives of the present project include a systematic study of the structural and transport properties of micro-mesoporous materials with hierarchical organization of their pore spaces, the establishment of their interrelation, and the gain of fundamental knowledge for a rational design of these materials in practical applications. Through a synergetic experimental approach using gas sorption, NMR cryoporometry, IR micro-imaging, pulsed field gradient NMR diffusometry, and their combinations, computer modelling and theory, the project will be aiming at: (i) developing experimental approaches and methodologies allowing a comprehensive structural characterization of the two pore spaces composed by micro- and mesopores; (ii) correlating the structural information with both the microscopic and mesoscopic transport properties of the materials and elucidating the decisive elementary mass transfer mechanisms and mass transfer resistances emerging on different length-scales for a broad range of thermodynamic conditions; (iii) developing theoretical and/or numerical models providing a deeper understanding (and a quantitative prediction) of the mass transfer processes in hierarchical porous materials and providing the routes for process-oriented structure optimization. Being focused on materials of immediate interest for chemical industry, the project may contribute to technology improvement and may help to increase the economic value of relevant products.

多孔材料由于其传输性能和化学功能的良好结合，其孔隙空间的分级组织引起了越来越多的关注。虽然这些材料的合成路线已经开发，更好地了解他们的结构，特别是，结构动力学的关系，仍然需要优化其在实际应用中的使用。本项目的主要目标包括系统地研究微孔-介孔材料的结构和传输特性，其孔隙空间的分级组织，建立它们之间的相互关系，以及获得这些材料在实际应用中的合理设计的基础知识。通过使用气体吸附、核磁共振低温孔隙测定法、红外显微成像、脉冲场梯度核磁共振扩散测定法及其组合、计算机建模和理论的协同实验方法，该项目的目标是：（一）开发实验方法和手段，以便对由微孔和中孔组成的两种孔隙空间进行全面的结构表征;（ii）将结构信息与材料的微观和介观输运性质相关联，并阐明在宽范围的热力学条件下在不同长度尺度上出现的决定性基本传质机制和传质阻力;（iii）开发理论和/或数值模型，提供对分级多孔材料中传质过程的更深入理解（和定量预测），并提供面向过程的结构优化途径。由于该项目的重点是化工行业的直接利益，因此可能有助于技术改进，并可能有助于提高相关产品的经济价值。