Advanced Ultra-Supercritical Coal-Fired Power Plant with Post-Combustion Carbon Capture: Analysis of Electricity Penalty and CO 2 Emission Reduction

Branimir Tramošljika, Paolo Blecich, Igor Bonefačić and Vladimir Glažar
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Branimir Tramošljika: Faculty of Engineering, University of Rijeka, 51000 Rijeka, Croatia
Paolo Blecich: Faculty of Engineering, University of Rijeka, 51000 Rijeka, Croatia
Igor Bonefačić: Faculty of Engineering, University of Rijeka, 51000 Rijeka, Croatia
Vladimir Glažar: Faculty of Engineering, University of Rijeka, 51000 Rijeka, Croatia

Sustainability, 2021, vol. 13, issue 2, 1-20

Abstract: This article presents the performance analysis of a 700 MW future planned advanced ultra-supercritical (A-USC) coal-fired power plant fitted with post-combustion carbon capture and storage (CCS) technology. The reference A-USC unit without CCS achieves a net efficiency of 47.6% with CO 2 emissions of 700 kgCO 2 /MWh. Relatively to subcritical units, the net efficiency of the A-USC is 8%-pts higher while CO 2 emissions are 16.5% lower. For a CO 2 removal rate of 90%, the net efficiency of the CCS integrated A-USC unit is 36.8%. The resulting net efficiency loss is 10.8%-pts and the electricity output penalty is 362.3 kWh el /t CO2 for present state CCS technology. The study continues with the assessment of interface quantities between the capture unit and the steam cycle affecting the performance of the A-USC. Improved CO 2 absorbents could alleviate the net efficiency loss by 2–3%-pts, and enhanced CO 2 compression strategies and advanced heat integration could further reduce the efficiency loss by 0.5–1.2%-pts and 0.4–0.6%-pts, respectively. The total efficiency gain from CCS technology upgrades is estimated at 3.6%-pts, thus bringing down the net efficiency loss to 7.2%-pts and the electricity output penalty to 241.7 kWh el /t CO2 .

Keywords: advanced ultra-supercritical; coal-fired power plant; post-combustion carbon capture; net efficiency loss; electricity output penalty; carbon emissions (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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