GAS SEPARATION COMPOSITE MEMBRANE, GAS SEPARATION MODULE, GAS SEPARATOR, GAS SEPARATION METHOD AND PRODUCTION METHOD OF GAS SEPARATION COMPOSITE MEMBRANE

摘要

PROBLEM TO BE SOLVED: To provide a gas separation composite membrane exhibiting excellent gas permeability and gas separation selectivity even under a high pressure condition, being hardly affected by an impurity component such as toluene and the like existing in natural gas, being excellent in folding resistance, capable of being processed to various module forms, hardly causing membrane defects and capable of being produced in a high yield.SOLUTION: A gas separation composite membrane 10 has a gas permeable organic support 4 and a gas separation layer 1 being disposed on the organic support 4 and containing a silazane compound. In the gas separation composite membrane 10, the organic support 4 of the composite membrane 10 is made of a layer 2 contacting with a gas separation layer existing between a gas permeable porous layer 3 and the gas separation layer 1 and consisting of a compound having an organosiloxane structure. In a production method of the composite membrane, a silazane compound-containing solution is coated on the gas permeable organic support and the gas separation layer is formed without performing heat treatment or plasma treatment.SELECTED DRAWING: Figure 1