Solid carbon dioxide absorbent and elimination and concentration method of carbon dioxide using the absorbent

Abstract

A method for manufacturing a solid carbon dioxide absorbent, comprises the steps of: (1) mixing (a) 10-80% by weight of fibroid material capable of resisting high temperature more than 100 DEG C, (b) 10-80% by weight of porous inorganic material, (c) 5-20% by weight of organic-inorganic binder, to make paper; (2) after forming the paper into a single-faced corrugated preform, winding the preform to manufacture a cylindrical honeybee preform; (3) cooling after dipping the honeybee preform in a solution dissolved with the carbon dioxide absorbing material; and (4) cooling after calcining the honeybee preform carrying the carbon dioxide absorbing material. When carbon dioxide in waste gas is removed by the solid carbon dioxide absorbent manufactured by the method, an absorbent broken phenomenon or process pressure reduction caused by air flow does not occur. A stable dry type carbon dioxide absorption and separation concentration processes capable of saving device cost and operation cost can be implemented without filtration or periodic supplement of concentrated carbon dioxide by simplifying the processes.

Description

technical field [0001] The present invention relates to a carbon dioxide absorbent and a method for removing and concentrating carbon dioxide using the absorbent, and more particularly to a solid absorbent with a carbon dioxide absorbing substance loaded on a formed honeycomb body and a method for absorbing, separating and concentrating carbon dioxide using the absorbent method. Background technique [0002] Currently, research is actively being carried out to recover carbon dioxide, which is the main cause of global warming. As one of these methods, a carbon dioxide absorption and removal process using a dry absorbent containing an alkali metal salt has conventionally been used. This method involves making a paste of an alkali metal salt in a porous substance such as zeolite and alumina, and then making a paste with a binder (cordierite, etc.), and producing spherical carbon dioxide by spray drying (spray dryer) After absorbing the absorbent, it is used to absorb and remo...

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Problems solved by technology

Therefore, there are various problems as follows: high-pressure air supply is required; crushing phenomenon (powdering) may occur with the flow of the absorbent; the absorbent needs to be replenished every cycle; since the concentrated carbon dioxide (production gas) contains fine powder absorbent, Filtration required; pressure drop in reaction tower due to particulate absorbent may occur

[0004] In addition, a process of absorbing and removing carbon dioxide by using a carbon dioxide absorber containing liquid amine (amines) is also known, but there are disadvantages in that liquid amine is expensive and processing costs are high, by-products are produced, and corrosion of process materials may occur.

[0005] In addition, there is a carbon dioxide adsorption and removal process using zeolite, but the cost of carbon dioxide removal is high and the economy is low.

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