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Korean Chemical Engineering Research,
Vol.50, No.4, 646-653, 2012
Vol.50, No.4, 646-653, 2012
건식 흡수제를 이용한 발전소배가스의 CO2 회수공정 경제성분석
Economic Evaluations of CO2 Capture Process from Power Plant Flue Gas Using Dry Sorbents
본 연구는 한국에너지기술연구원(KIER)에서 개발한 건식 CO2 흡수공정에 대한 경제적 타당성을 분석하고, 경쟁 기술과 비교함으로써 기술의 경제적 유효성을 판단하기 위한 것이다. 500 MW 급 석탄화력 발전소를 대상으로 건식 흡수제를 사용한 CO2 흡수공정의 초기투자비와 연간운전비를 산정하여 LCOE(Levelized Cost of Energy)와 CO2 포집 비용을 산출한 결과 각각 32.46$/MWh와 28.15$/톤CO2로 분석되었다. 경제성분석을 위한 기본조건들을 가정하여 CO2 판매가격, 전력비, 흡수제 가격 및 투자비를 대상으로 순현재가치(NPV), 내부수익율(IRR) 및 민감도분석을 수행하였다. CO2를 회수하여 판매할 경우, CO2 배출권가격이 CO2 톤 당 50$로 가정하였을 때, 한국에너지기술연구원에서 개발한 건식 CO2 흡수공정의 IRR은 15%, NPV는 6,631,000$였으며, 투자회수기간(PBP)은 5.93년으로 추산되어 경제성 측면에서 유효하였다.
We studied the economic evaluations on Korea Institute of Energy Research (KIER)’s CO2 capture process using dry sorbents, and compared the results with those of comparable technologies. Capital and operating costs of the CO2 capture system for 500 MW coal fired power plant were estimated to determine the economic feasibility. LCOE(Levelized Cost of Energy) and CO2 capture cost appeared 32.46$/MWh and 28.15$/tonCO2, respectively. The internal rate of return (IRR), the net present values (NPV), and the payback period (PBP), were calculated by assuming several variables. As the result of calculation, IRR of KIER’s CO2 capture system was 15%, NPV was calculated 6,631,000$, and PBP was 5.93 years at $50/tCO2 of CER price. Consequently, this process can compete with other comparative processes using dry sorbents.
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