The Cost of Carbon Capture and Storage for Natural Gas Combined Cycle Power Plants

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• 作者：Edward S. Rubin ; Haibo Zhai
• 刊名：Environmental Science & Technology (ES&T)
• 出版年：2012
• 出版时间：March 20, 2012
• 年：2012
• 卷：46
• 期：6
• 页码：3076-3084
• 全文大小：357K
• 年卷期：v.46,no.6(March 20, 2012)
• ISSN：1520-5851

文摘

This paper examines the cost of CO<sub>2sub> capture and storage (CCS) for natural gas combined cycle (NGCC) power plants. Existing studies employ a broad range of assumptions and lack a consistent costing method. This study takes a more systematic approach to analyze plants with an amine-based postcombustion CCS system with 90% CO<sub>2sub> capture. We employ sensitivity analyses together with a probabilistic analysis to quantify costs for plants with and without CCS under uncertainty or variability in key parameters. Results for new baseload plants indicate a likely increase in levelized cost of electricity (LCOE) of $20鈥?2/MWh (constant 2007$) or $22鈥?0/MWh in current dollars. A risk premium for plants with CCS increases these ranges to $23鈥?9/MWh and $25鈥?6/MWh, respectively. Based on current cost estimates, our analysis further shows that a policy to encourage CCS at new NGCC plants via an emission tax or carbon price requires (at 95% confidence) a price of at least $125/t CO<sub>2sub> to ensure NGCC-CCS is cheaper than a plant without CCS. Higher costs are found for nonbaseload plants and CCS retrofits.