Solid carbon dioxide absorbent and method for removing and concentrating carbon dioxide using the same

Abstract

A method for manufacturing a solid carbon dioxide absorbent comprises the steps of: manufacturing papers by mixing 10-80 wt% of a fiber material capable of enduring at over 100°C, 10-80 wt% of a porous inorganic material, and 5-20 wt% of inorganic / organic binder; manufacturing a cylindrical honeycomb molded body by molding the papers in a polarization molded body then winding it; dipping the honeycomb molded body in a solution in which a carbon dioxide absorbing material is dissolved, then drying it; and hardening the honeycomb molded body dipped with the carbon dioxide absorbing material and cooling it. The solid carbon dioxide absorbent manufactured by the method does not generate a breaking phenomenon of the absorbent or a process pressure descent due to the air flow during the removal of carbon dioxide from exhaust gas, does not require a regular filling or filtering of concentrated carbon dioxide, and can realize a stable dry process of absorbing, separating and concentrating carbon dioxide with reduced operating cost and facility cost through process simplification. [Reference numerals] (AA) ceramic paper(comprising ceramic fiber, porous inorganic, binder);(BB) molding in cylindrical honeycomb having cross section with holes by molding a side in wave shape and winding;(CC) dipping absorbent in solution(K2CO3 or Na2CO3 or CaCO3, Amine);(DD) drying, 100-120°C;(EE) plasticizing, 450-600°C

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...

AI Technical Summary

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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