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NTIS 바로가기Korean chemical engineering research = 화학공학, v.55 no.2, 2017년, pp.141 - 155
손민아 (포항산업과학연구원 기후에너지연구그룹) , 김국희 (포항산업과학연구원 기후에너지연구그룹) , 한건우 (포항산업과학연구원 기후에너지연구그룹) , 이민우 (계명대학교 화학공학과) , 임준택 (포스코 신사업실)
In the present paper, we investigated the development status of precipitated calcium carbonate (PCC) production using steel slag, which is one of mineral carbonation (MC) technologies, from the standpoint of
핵심어 | 질문 | 논문에서 추출한 답변 |
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국내의 CO2 시장은 어떤 상황인가? | 즉, 포집된 CO2의 처리를 통한 경제성 확보가 쉽지 않은 상황이라고 할 수 있다. 국내의 경우 CO2 시장의 대부분을 차지하는조선업계(용접용), 음료용 등 액화탄산 시장은 약 100만 톤/년 이내, 액체탄산 공급가격은 약 15만원/톤이며, 시장은 거의 포화된 상태로 알려져 있다[1]. 따라서, 대량 CO2 배출원인 발전소나 제철소 등에만 국한시켜 CO2 포집 및 판매 사업을 추진한다 하더라도 포집된 CO2(보통 수만 톤/년)의 상업적인 시장은 상당히 제한적이라고 볼 수 있다. | |
이산화탄소 광물화 기술의 제한점은? | CCUS 기술 중 다양한 광물 자원을 CO2와 직접 또는 간접적으로반응시켜 탄산염의 형태로 전환시키는 기술인 광물 탄산화(mineralcarbonation, 혹은 광물화(mineralization)) 는 CO2를 안전하게 격리 /저장 할 수 있는 기술이다. 하지만, 처리 용량이 현재 중소규모이며,원료물질의 파쇄 등 에너지 집약적인 전처리 과정, 전체적으로 느린반응 속도, 광물 자원과 CO2 배출원의 위치적 문제, 탄산염을 수용할 수 있는 대규모의 수송·저장 시설 부족 등의 문제로 그 효과가제한되고 있다[4]. 이러한 문제점에도 불구하고 광물 탄산화는 저장 가능량과 안정성 면에서 매우 뛰어난 방법임이 보고되었고, 상용화되었을 경우 Table 1에서 볼 수 있듯이 대량의 CO2 처리가 가능하며, 영구적인 CO2 저감기술이 될 수 있어 전도가 유망한 기술이다[5,6]. | |
이산화탄소 감축이 어려운 이유는? | 대표적인 온실가스인 이산화탄소(carbon dioxide, CO2) 감축 문제는 전 세계적인 이슈로 부상하고 있으나, CO2 포집·저장 기술(CCS, Carbon Capture & Storage)과 같이 실질적인 온실가스 감축 기술들은 경제성 측면에서 아직 상용화가 어렵다는 것이 일반적인 견해이다. 즉, 포집된 CO2의 처리를 통한 경제성 확보가 쉽지 않은 상황이라고 할 수 있다. |
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