METHOD FOR SEPARATING METHANE GAS FROM CBM BY MEMBRANES

摘要

PURPOSE: A separating method of methane is provided to use a porous membrane module consisting of 2-4 porous membranes and to increase the purity of separated methane. CONSTITUTION: A separating method of methane separates methane from a cold bed methane of which contents of methane and carbon dioxide are 88-92 weight% and 8-12 weight%, respectively using porous membrane. The pressure difference of the front side and the back side of the porous membrane is 5-7 MPa. The material of the porous membrane is polysulfone hollow fiber. The flux of the cold bed methane is 3.0-20.0 LPM. The porous membrane has a porous membrane module shape in which 2-4 porous membranes are connected to each other.