CO2 capture system

Abstract

A CO2 recovery system (1) recovers CO2 by bringing CO2-containing gas into contact with a reaction solution that contains NaOH stored in a reaction tank (11) to generate a target product, wherein the target product extracted from the reaction solution is controlled according to the maximum temperature of the reaction solution after NaHCO3 is generated in the reaction solution, the extraction temperature which is the temperature of the reaction solution when the target product is extracted from the reaction tank (11), and the initial concentration of NaOH in the reaction solution.

Claims

1. CO2 is added to the reaction solution containing NaOH stored in the reaction vessel. ２ CO ２ CO2 recovery ２ It is a collection system, The target product described above is NaHCO ３ It is an aqueous solution, NaHCO3 in the above reaction solution ３ The maximum temperature of the reaction solution after generation is less than 65°C. The removal temperature, which is the temperature of the reaction solution when the target product is removed from the reaction vessel, is 10°C or higher and less than 20°C. The initial concentration of NaOH mentioned above is greater than 0%, and the upper limit is within the range of 3.86 to 4.57%. ２ Collection system.

2. A CO recovery system that produces a target product by bringing a CO-containing gas into contact with a reaction solution containing NaOH stored in a reaction tank. ２ The CO recovery system recovers CO by producing a target product through contact of a CO-containing gas with a reaction solution containing NaOH stored in a reaction tank. ２ The CO recovery system ２ is as follows: The target product described above is NaHCO ３ It is an aqueous solution, NaHCO3 in the above reaction solution ３ The maximum temperature of the reaction solution after generation is less than 65°C. The removal temperature, which is the temperature of the reaction solution when the target product is removed from the reaction vessel, is 20°C or higher and less than 30°C. The initial concentration of NaOH mentioned above is greater than 0%, with an upper limit of 4.57-5.29%. ２ Collection system.

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