| abstract |
[PROBLEMS] To provide a gas separation membrane module having high permeation selectivity which is worth practical use. A gas separation membrane (106) including a gas separation layer (109) having an exterior body (108), an inorganic membrane, and a grain boundary membrane arranged at grain boundaries of the inorganic membrane is provided. A gas separation membrane module 110 inserted in the body 108 and having an area of 4 to 50 m 2 of the gas separation layer 109 inserted. [Selected figure] Figure 1 |