Non-hydrocarbon gas separation device and inorganic separation membrane regeneration method

A gas separation device separating non-hydrocarbon gas contained in treatment target gas, the non-hydrocarbon gas separation device comprising:

• a separation membrane module reducing the non-hydrocarbon gas in the treatment target gas by allowing the non-hydrocarbon gas to permeate an inorganic separation membrane from a primary side to a secondary side;
• a treatment target gas supply path connected to a space on the primary side in the separation membrane module and supplying the treatment target gas containing the non-hydrocarbon gas;
• a permeation gas flow path connected to a space on the secondary side in the separation membrane module and allowing permeation gas to flow out after the separation membrane is permeated;
• a regeneration gas supply path connected to the space on the primary side and supplying regeneration gas for regenerating a separation ability of the inorganic separation membrane, wherein the regeneration gas supply path receives moisture containing carbon dioxide gas, as the regeneration gas, that is either one of (i) removed from a source natural gas using an amine or (ii) sourced from a natural carbon dioxide gas field;
• a drying gas supply path connected to the space on the primary side and supplying drying gas for removing moisture taken into the inorganic separation membrane as a result of the supply of the moisture-containing regeneration gas;
• and
• wherein the moisture containing carbon dioxide gas is sourced from a natural gas liquefaction facility wherein the moisture containing carbon dioxide gas is extracted from natural gas using amine.