이산화탄소 포집기술 중 건식흡수제를 이용한 연소 후 이산화탄소 포집기술에 대하여 최신기술개발 현황에 대하여 자세히 기술하였다. CO2 포집에 있어서 건식흡수제 이용 기술의 장점으로는 조업온도의 폭이 크고, 에너지손실이 적으며, 폐수발생이 없고, 부식성이 적으며, 고체폐기물의 상대적인 천연성을 들 수 있다. 현재 한국과 미국에서는 건식 흡수제의 성능 개선과 더불어 실제 연소배가스로부터 CO2 포집을 위한 공정 개발을 통해 포집비용을 줄이려는 연구가 지속적으로 이루어지고 있다. 건식흡수제는 가격이 싼 알칼리금속 계열의 화학흡수제, 아민을 실리카 지지체에 고정시킨 흡수제, 아민을 실리카 지지체에 공유결합시킨 흡수제, 기공성의 탄소에 아민의 기능성을 첨가시킨 흡수제, 아민고정 고분자지지체 흡수제, 금속유기구조체등의 연구가 이루어지고 있다. 포집비용을 대폭 줄이기 위하여 소재에 있어서도 혁신적인 성능 개선이 필요한 시점이다.

This paper addresses recent status and trends of carbon dioxide capture technologies using dry sorbents in the flue gas. The advantages of dry sorbent CO2 capture technology are broader operating temperature range, less energy loss, less waste water, less corrosion problem, and natural properties of solid wastes. Recently, U.S.A. and Korea have been developing processes capturing CO2 from real coal flue gas as well as sorbents improving sorption capacity to decrease total CO2 capture cost.. New class of dry sorbents have been developed such as chemisorbents with alkali metals of which material cost is low, amines physically adsorbed on silica supports, amines covalently tethered to the silica support, carbon-supported amines, polymer-supported amines, amine-containing solid organic resins and metal-organic framework. The breakthrough is needed in the materials on dry sorbents to decrease capture cost.

Dry Sorbent CO2 Capture Post-Combustion Carbon Capture & Storage CCS

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