High-Flux High-Selectivity MFI Molecular Sieve Membranes: Microstructure Control and High-Temperature High-Pressure Use

摘要提案标题：高通量、高选择性MFI分子筛膜：微结构控制和高温高压脱附研究项目编号：CTS-0522518主要研究员：Michael Tsapatsis机构：明尼苏达大学本项目的目标是在管状多孔不锈钢支撑体上合成高度取向的微米厚MFI膜，并测试其在高温膜反应器条件下的性能。还提出了扩展目前的方法，并首次制备三种类型的膜与垂直于膜表面的MFI结构的三个主要孔取向（直，之字形，曲折），并检查它们的微观结构和分离性能。 将被证明的微观结构控制的水平将带来实用的沸石多晶薄膜，因为它们可以接近单晶。将表征微观结构并测量分离性能。除了它们的实际意义（识别高性能的微结构），所提出的实验是具有根本意义的，因为它们将提供第一组气体和蒸汽渗透数据通过一个给定的结构类型的沸石膜具有显着不同的优选取向。这样的数据集预计是有价值的，在提供微观结构和膜性能之间的连接，并引导在无机膜领域的进一步发展。 拟议的研究将对全球开发节能分离技术的努力产生更广泛的影响。在商业化的高通量不锈钢支撑体上生长高质量的膜是扩大规模的必要步骤，也是使我们的膜可用于分离和反应工程领域的必要步骤。此外，将解决的工程问题，相对于表面上的无机纳米粒子的定向组装和模板晶体生长的控制是中央的功能纳米结构的制造。因此，从传感器到具有可控孔隙度和纳米结构的催化剂，纳米尺度的一系列新技术可能会受到当前研究结果的影响。 该研究计划有一个教育部分，包括本科生参与研究和明确的推广工作。 该项目可能会刺激新的分离过程和催化膜反应器的开发。

AbstractProposal Title: High-flux, High-selectivity MFI Molecular Sieve Membranes: Microstructure Control and High-temperature, High-pressure UseProposal Number: CTS-0522518Principal Investigator: Michael TsapatsisInstitution: University of MinnesotaThe objective of this project is to synthesize highly oriented micrometer-thick MFI films on tubular porous stainless steel supports, and to test their performance under high temperature membrane reactor conditions. It is also proposed to extend the current methodology and prepare for the first time three types of membranes with the three main pore orientations (straight, zig-zag, tortuous) of the MFI structure perpendicular to the film surface and examine their microstructure and separation performance. The level of microstructural control that will be demonstrated will bring practical zeolite polycrystalline thin films as close they can be to single crystals. The microstructure will be characterized and separation performance will be measured. In addition to their practical significance (identifying high performance microstructures), the proposed experiments are of fundamental significance because they will provide the first set of gas and vapor permeation data through zeolite membranes of a given structure type with drastically different preferred orientations. Such a data set is expected to be valuable in providing a connection between microstructure and membrane performance and to guide further developments in the field of inorganic membranes. The proposed research will have broader impacts on the worldwide effort for developing energy efficient separation technologies. High quality film growth on commercial, high-flux, stainless steel supports is a necessary step towards scale up and to make our membranes available to the separations and reaction engineering communities. Moreover, the engineering issues that will be addressed with respect to oriented assembly of inorganic nanoparticles on surfaces and control of templated crystal growth are central for the fabrication of functional nanostructures. Consequently, an entire range of new technologies at the nanoscale, ranging from sensors to catalysts with controlled porosity and nanostructure may be affected by the findings of the current effort. The research program has an educational component including involvement of undergraduate students in the research and a well-defined outreach effort. This project may stimulate the development of new separation processes and catalytic membrane reactors.