Metal organic framework polymer mixed matrix membranes

Abstract

Metal-organic framework (MOF)-polymer mixed matrix membranes (MOF-MMMs) can be prepared by dispersing high surface area MOFs into a polymer matrix. The MOFs allow the polymer to infiltrate the pores of the MOFs, which improves the interfacial and mechanical properties of the polymer and in turn affects permeability. These mixed matrix membranes are attractive candidates for practical gas separation applications such as CO2 removal from natural gas.

Description

[0001] Claiming priority from an earlier national application [0002] This application claims priority to Provisional Application No. 61 / 286,435, filed December 15, 2009, the contents of which are incorporated herein by reference. Background of the invention [0003] The present invention relates to the use of metal organic frameworks (MOFs) in mixed matrix membranes. More particularly, the present invention relates to the use of MOFs in specific settings that provide enhanced gas separation, including the separation of carbon dioxide and methane. [0004] Methods of separating gases with membranes have undergone major developments since the introduction of the first membrane-based industrial hydrogen separation process about 20 years ago. The design of new materials and efficient methods will further advance membrane gas separation methods over the next decade. [0005] The gas transport properties of many glassy and rubbery polymers have been measured, driven by the inves...

AI Technical Summary

Problems solved by technology

However, these polymers do not possess superior permeability attractive for industrialization compared to current commercial cellulose acetate membrane products, consistent with the trade-off relationship reported by Robeson