Treatment method for reducing carbon dioxide emission of combustion exhaust gas

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United States of America Patent

PATENT NO 11414323
APP PUB NO 20200131045A1
SERIAL NO

16619534

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
SENTEC CO LTD16-2-2703 SHIBA-4CHOME MINATO-KU TOKYO 108-0014
HORIISHI NANAO19-5-1006 KODAI-1CHOME MIYAMAE-KU KAWASAKI-SHI KANAGAWA 216-0007

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Horiishi, Nanao Kawasaki, JP 31 664
Ueno, Hiromoto Tokyo, JP 1 1

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