CARBON MEMBRANES FOR GAS SEPARATION

Two kinds of pyrolysis carbon membranes for gas separation were prepar ed by control of preparation conditions. One was characterized by high er selectivity and another by higher permeability. The preparation pro cess of the carbon membranes consists of pyrolysis and activation step s. The first step was conducted under inert gas and the second step in an oxidation environment. A thermosetting phenol formaldehyde resin m embrane was chosen as the precursor. Preparation conditions were impor tant factors for the structures and properties of the resulting carbon membranes. Pore size distribution was measured and morphology was obs erved. Effects of membrane structure on characteristics were discussed .