项目来源

美国国家能源科学基金(DOE)

项目主持人

Tsapatsis,Michael

项目受资助机构

THE JOHNS HOPKINS UNIVERSITY

财政年度

2024,2023

立项时间

未公开

项目编号

DE-SC0021212

研究期限

未知 / 未知

项目级别

国家级

受资助金额

2812418.00美元

学科

Separation Science

学科代码

未公开

基金类别

Grant

关键词

未公开

参与者

未公开

参与机构AI

华东理工大学

项目标书摘要：Nanoporous membranes based on metal-organic frameworks(MOFs)can enable critical advances in low-energy chemical separations that are priorities to the DOE mission,such as the production of H2;capture and sequestration of CO2;production of methane and fractionation of higher hydrocarbons from shale gas resources;and production of important industrial chemicals(e.g.,ethylene,propylene,and aromatic isomers).However,there is lack of fundamental understanding on how the permeation properties of MOF membranes(i.e.,flux and selectivity)are related to the complex microstructures of thin films deposited in/on porous substrates and the corresponding processing steps used to create these thin films.As a result,despite demonstrations of high-performance MOF membranes,the current-state-of-art cannot reliably achieve MOF membranes with properties that meet specific application/process needs for many DOE priority areas.Ours team introduced and is currently further developing a solvent-free synthesis and modification methodology for thin film MOF membranes,which creates intricate thin film microstructures with highly tunable permeation properties.It consists of a combination of vapor phase and irradiation(e.g.,electron-beam and X-ray)-induced MOF deposition and modification methods.We systematically establish processing-structure-separation performance relationships by determining membrane structure,adsorption,and permeation properties during the synthesis and modification of MOF membranes.A unique aspect of our approach is the development of surface science and permeation methods for in situ monitoring of MOF thin film structure and properties enabled by our solvent-free synthesis and modification methods,which are compatible with surface science tools and gas permeation devices.We carry out systematic studies using operando surface science tools under reactive,X-ray,UV,and e-beam conditions to probe structural and chemical modifications.These state-of-the-art experimental methodologies are combined with a multitude of computational approaches(ranging from electron structure calculations on clusters for spectroscopic signals to force-field-based simulations involving MOF/substrate structures for membrane selectivities)to provide mechanistic understanding.This effort addresses overarching research priorities for BES including Fundamental Science to Enable Clean Energy and to Transform Low-Carbon Manufacturing and is related to BES basic research needs(BRNs)for the Hydrogen Economy and Carbon Capture.