公开(公告)号：US11414323B2

公开(公告)日：2022-08-16

申请号：US16619534

申请日：2019-04-11

申请人： SENTEC CO. LTD. ,  Nanao Horiishi

发明人： Nanao Horiishi ,  Hiromoto Ueno

IPC分类号： B01D53/18 ,  B01D53/62 ,  B01D53/73 ,  B01D53/78 ,  C01D1/22 ,  C01D7/12

摘要： A treatment method for reducing carbon dioxide emission of combustion exhaust gas includes: a caustic soda synthesis step; a treatment step of reducing carbon dioxide emission of combustion exhaust gas; and a recycling step. In the caustic soda synthesis step, a natural sodium carbonate aqueous solution (Na2CO3) prepared by dissolving natural sodium carbonate ore powder composed of Na2CO3 and NaHCO3 in a caustic soda aqueous solution is used to generate a caustic soda aqueous solution and calcium carbonate precipitate by a causticization reaction with slaked lime, and solid-liquid separation is performed to obtain a synthetic caustic soda aqueous solution. In the treatment step, the synthetic caustic soda aqueous solution and purified combustion exhaust gas are brought into gas-liquid countercurrent contact so that carbon dioxide in the exhaust gas is absorbed by the synthetic caustic soda aqueous solution and immobilized as sodium carbonate.