Korean Chemical Engineering Research, Vol.49, No.2, 244-249, April, 2011
연소 후 CO2 포집공정이 적용된 500MWe 석탄화력발전소의 성능 및 경제성평가
Performance and Economic Analysis of 500 MWe Coal-Fired Power Plant with Post-Combustion CO2 Capture Process
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초록
연소 후 CO2 포집기술이 적용된 500 MWe 석탄화력발전소의 경제성평가를 수행하고 CO2 저감비용 (Cost of CO2 avoided)을 산출하였다. 본 연구에서 고려된 CO2 포집기술은 이미 상업적으로 적용이 가능하고, 기존의 화력발전에 적용이 용이한 화학 흡수법을 기초로 하였으며 투자비용 산출을 위해 IEA Greenhouse Gas R&D Programme에서 제시하는 데이터를 활용하였다. 또한 CO2 포집공정 중 가장 많은 발전효율 저하를 가져오는 재열기(리보일러)에 투입되는 열에너지(재생에너지)를 대상으로 민감도분석을 수행하고 각각의 경우에서의 CO2 저감비용을 산출하였다. 분석결과 CO2 포집공정에 적용될 흡수제로 MEA(모노에탄올아민)가 사용되고 재생탑에서 필요한 재생에너지가 3.31 GJ/tonCO2인 경우 발전효율은 CO2 포집설비 설치 전의 41.0에서 31.6%로 9.4% 감소하고 이때의 CO2 저감비용은 43.3 $/tonCO2 로 산출되었다. 그러나, 흡수제 재생에너지를 변수로 한 민감도분석에서 재생에너지가 2.0 GJ/tonCO2로 낮아질 경우 CO2 저감비용은 36.7 $/tonCO2까지 낮아질 것으로 분석되었다.
In this study, performance and economic analysis of 500 MWe coal-fired power plant with CO2 capture process was performed. For this purpose, chemical absorption method which is commercially available and most suitable for thermal power plant was studied and a criteria for technical and economic assessment of power plants suggested by IEA Greenhouse Gas R&D Programme was used. And we performed the sensitivity analysis focused on regeneration energy which exceed half of the total capture energy. Based on MEA(Monoethanoleamine) as a main chemical solvent and 3.31 GJ/tonCO2 regeneration energy in the stripper, net power efficiency was reduced from 41.0% (no capture) to 31.6%(with capture) and the cost of CO2 avoided was estimated 43.3 $/tonCO2. And in case of 2.0 GJ/tonCO2 regeneration energy, the cost of CO2 avoided was calculated as 36.7 $/tonCO2.
- Yi CK, Korean Ind. Chem. News, “Advances of Carbon Capture Technology", 12(1), 30 (2009)
- Rao AB, Rubin ES, Environ. Sci. Technol., “A Technical, Economic and Environmental Assessment of Amine-based CO2 capture Technology for Power plant Greenhouse Gas Control", 36, 4467 (2005)
- An Interdisciplinary MIT study, “The Future of Coal" (2007)
- Rubin ES, Chen C, Rao AB, Energy Policy, “Cost and Performance of Fossil Fuel Power Plants with CO2 Capture and Storage,”, 35(9), 4444 (2007)
- Feron PHM, Energy Procedia., “The Potential for Improvement of the Energy Performance of Pulverized Coal Fired Power Stations with Postcombustion Performance of Pulverized Coal Fired Power Stations with Postcombustion", 1, 1067 (2009)
- Park JW, Bae JS, Kweon YJ, Kim HJ, Jung H, Han C, Korean Chem. Eng. Res., “Economic Evaluations of DCL/ICL Processes”, 47(6), 781 (2009)
- IEA Greenhouse Gas R&D Programme, “Criteria for Technical and Economic Assessment of Plants with Low CO2 Emissions,” International Energy Agency ed., Gloucestershire, U.K (2009)
- Bolland O, Undrum H, Adv. Environ. Res., “A Novel Methodology for Comparing CO2 Capture Options for Natural Gas-fired Combined Cycle Plants”, 7, 901 (2003)
- Rubin ES, Rao AB, Chen C, “Comparative Assessments of Fossil Fuel Power Plants for CO2 Capture and Storage,” Proceedings of 7th International Conference on Greenhouse Gas Control Technologies (2004)
- Abu-Zahra MRM, Niederer JPM, Feron PHM, Versteeg GF, Int. J. Greenhouse Gas Control., “CO2 Capture from Power plants Part II. A Parametric Study of the Economical Performance Based on Monoethanolamine", I, 135 (2007)