Abstract:
본 발명은 에탄올에 알칼리금속 수산화물을 용해시킨 후 이산화탄소를 주입하여 습식흡수시킴으로써 알칼리금속 에틸 카보네이트를 얻는 단계를 포함하는 이산화탄소의 습식흡수 방법을 제공한다. 본 발명에 따르면, 알칼리 금속을 원료로 하더라도 CO 2 흡수 후 최종 생성된 탄산염이 고체형태로 침전되어 분리하기 용이하며, CCS 기술적 측면에서 알칼리 금속을 이용한 종래 수용액 기반의 습식 흡수 기술의 문제점을 해결 할 수 있다. 또한, 본 발명에서는 고체 형태의 알칼리금속 에틸 카보네이트를 물과 반응시킴으로써 액상의 에탄올과 고상의 MeHCO 3 로 변화되는바, 용이한 방법으로 에탄올을 재생 또는 제조할 수 있다.
Abstract:
The present invention relates to a dry absorbent for carbon dioxide or an inorganic carbonate conversion agent for carbon dioxide, comprising an active component capable of efficiently recovering carbon dioxide from a gas stream by selectively reacting with carbon dioxide, and fly ash as a scaffold. The dry absorbent for carbon dioxide or inorganic carbonate conversion agent for carbon dioxide according to the present invention can be used as a substitute for an existing dry absorbent for carbon dioxide or inorganic carbonate conversion agent for carbon dioxide because the dry absorbent for carbon dioxide or inorganic carbonate conversion agent for carbon dioxide can efficiently treat coal fly ash classified as waste by including coal fly ash as a scaffold, because the manufacturing process thereof is simple and environmentally friendly with no organic matters harmful to the environment used, because the dry absorbent for carbon dioxide or inorganic carbonate conversion agent for carbon dioxide has a carbon dioxide absorption rate approximately 24% higher than that of a dry absorbent for carbon dioxide or an inorganic carbonate conversion agent for carbon dioxide without fly ash, because energy needed for regeneration can be reduced by approximately 22% by lowering the temperature of absorption and desorption by more than 100°C, because the design of process can be made flexible so as to be able to store carbon dioxide as well by burying the carbon dioxide converted into carbonate in case of difficult regeneration, and because the treatment of waste is easy owing to the dry absorbent for carbon dioxide or inorganic carbonate conversion agent for carbon dioxide able to be used as a building material. [Reference numerals] (AA) Hole size = 90 nm;(BB) Temperature (°C);(CC) Time (minute)
Abstract:
본 발명은 이산화탄소와 선택적으로 반응하여 가스기류에서 이산화탄소를 효율적으로 회수할 수 있는 활성성분과, 지지체로서 비산재를 포함하는 이산화탄소 건식 흡수제 또는 이산화탄소 무기탄산염 전환제에 관한 것이다. 본 발명에 따른 이산화탄소 건식 흡수제 또는 이산화탄소 무기탄산염 전환제는 지지체로서 석탄비산재를 함유함으로써 폐기물로 분류되는 석탄비산재를 효율적으로 처리할 수 있고, 제조공정이 간단하고, 환경에 유해한 유기물질이 사용되지 않으므로 친환경적일 뿐만 아니라, 비산재가 첨가되지 않은 이산화탄소 건식 흡수제 또는 이산화탄소 무기탄산염 전환제보다 이산화탄소 흡수율을 약 24% 상승시킬 수 있고, 탈착온도를 100 ℃ 이상 낮춤으로써 재생시 필요한 에너지의 약 22%를 저감할 수 있고, 재생이 어려울 경우 이산화탄소를 탄산염으로 전환하여 매립함으로써 이산화탄소의 저장도 가능하여 공정 설계의 유연성의 장점이 있으며, 또한 건축자재의 첨가제로서 사용될 수 있으므로, 폐기물에 대한 처리가 용이하므로 종래 이산화탄소 건식 흡� �제 또는 이산화탄소 무기탄산염 전환제를 대체하여 유용하게 사용될 수 있다.
Abstract:
The present invention provides a method for wet-type absorption of carbon dioxide comprising a step of obtaining alkali metal ethyl carbonate sequentially by dissolving alkali metal hydroxide in ethanol and by feeding carbon dioxide in order to be absorbed in a wet-type manner. According to the present invention, even when an alkali metal is used as a main ingredient, a carbonate which is finally produced after absorbing CO_2 is precipitated in a solid form so that the produced carbonate can be easily separated. In terms of CCS techniques, a problem of an existing wet-type absorbing technique based on a solution using alkali metals can be solved. Moreover, in the present invention, solid alkali metal ethyl carbonate reacts with water in order to be converted into liquid ethanol and solid MeHCO_3, so that ethanol can be reproduced or produced through an easy method.
Abstract:
The present invention provides a method for wet absorption of carbon dioxide, comprising the step of acquiring an alkali metal ethyl carbonate via the wet absorption of carbon dioxide injected after dissolving an alkali metal hydroxide in ethanol. According to the present invention, the final product of a carbonate after the absorption of carbon dioxide is easy to separate despite using an alkali metal as a raw material because the carbonate is precipitated in a solid state. The present invention can solve the problems of an existing wet absorption technology based on an aqueous solution using an alkali metal from the technical aspect of CSS. Also, the present invention can regenerate or manufacture ethanol easily because the alkali metal ethyl carbonate in a solid state is changed into ethanol in a liquid state and MeHCO3 in a solid state by reacting with water.