Bio-Metal Organic Framework-1 Membranes for CO2/CH4 Separation

Herein we present the successful preparation of continuous and reproducible Bio-MOF-1 membranes supported on porous stainless steel tubes. These membranes displayed high CO₂ permeances for equimolar mixtures of CO₂ and CH₄. The observed CO₂/CH₄ selectivities above one indicate that the separation  is promoted by competitive adsorption. The preferential CO₂ adsorption was attributed to the presence of adeninate amino basic sites present in the Bio-MOF-1 structure. To our best knowledge, we demonstrate for the first time: a) the synthesis of any continuous Bio-MOF membranes and b) the ability of these membranes to separate CO₂/CH₄ gas mixtures.