Method for reducing exhaust carbon dioxide
AssigneeNKK Corporation
InventorsTatsuhito Takahashi, Tsueno Isoo, Makoto Kato, Haruyoshi Tanabe
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Abstract
It is an object of the invention to effectively absorb and remove CO2 in an exhaust gas generated during an industrial process for reducing an amount of exhausting CO2 into the atmospheric air. The exhaust gas containing CO2 is blown into the agglomerate of solid particles containing CaO and/or Ca(OH)2 to contact CO2 to the agglomerate for fixing CO2 in the exhaust gas as CaCO3, thereby to reduce the CO2 concentration in the exhaust gas. Preferably, the solid particles contain water, and more preferably, the solid particles contain surface adhesive water.
Claims20
A method for reducing an exhaust carbon dioxide comprising the steps of:
- preparing agglomerates of solid particles containing at least one compound selected from the group consisting of CaO and Ca(OH)2;
- contacting an exhaust gas containing CO2 with the agglomerates of the solid particles in a reaction chamber, the solid particles having a film of adhesive water on a surface of the solid particles;
- and
- fixing CO2 in the exhaust gas as CaCO3 in the solid particles to reduce CO2 in the exhaust gas.
An underwater immersion block produced by a method comprising the steps of:
- preparing a mixture comprising a granular slag produced in a steel manufacturing process;
- and
- producing a carboxide by a carbonation reaction of a mixture to agglomerate the mixture by using the produced carboxide as a binder.
A method of producing an underwater immersion block, comprising the steps of:
- preparing a mixture comprising a granular slag produced in a steel manufacturing process;
- forming a packed bed using the mixture;
- and
- effecting a carbonation reaction of the mixture in the packed layer to agglomerate the mixture.
A method of creating a seaweed bed comprising the steps of:
- temporarily immersing a material comprising a heavy material in an existing seaweed bed so that marine algae adhere and grow on a surface of the material;
- recovering the material and transporting the material as a seed material in a place for creating the seaweed bed;
- and
- arranging a material for adhering the marine algae thereto around the seed material so that the marine algae on the seed material is proliferated to the other material.
Dependencies are inferred from the claim text.