Microporous Metal Organic Framework Membrane on Porous Support Using the Seeded Growth Method

A seeded growth method is used to prepare preferentially oriented and well-intergrown films of microporous metal organic framework (MMOF) on porous alpha-alumina discs. A randomly oriented seed layer is deposited which le-ads to an oriented membrane as a result of competitive grain growth during the secondary growth process. The orientation is such that the pores are preferentially aligned along the membrane thickness and the membrane exhibits ideal selectivity for H-2/N-2 as high as 23.