Since 1992 Esbjerg Power Station has been operating from Amerikavej at Esbjerg harbour. Unit 3’s 250-metre high chimney, the tallest in Denmark, makes the power station a distinct landmark at the quay in Esbjerg. In 2004 the power station’s environmental facilities were extended with a DeNOx facility for nitrogen oxide removal.
Esbjerg Power Station has a capacity of 378 MW and generated a net quantity of 2,405 GWh of electricity and 2,569 TJ of district heating in 2006.
The plant has an emission of 2.04 Mill tonnes of CO2 and exhaust gas of 6979 million Nm3
Dong Energy has ended the CATO project and are now in the final phase of the CAESAR project. Both are funded trough EU support mechanisms. The primary objective is to decrease the cost of capture down to 15 €/t CO2.
The pilot at Esbjerg has a budget of ~16 M€ (EU funding: 8.5 M€)
The main objective of the Esbjerg CCS demo, is R&D for the reduction of the cost of CO2 post-combustion capture. And also contribute to the feasibility and acceptance of the geological storage concept. It's also important to validate the concept on real site(s), making pilot plant testing for capture and detailed studies of future storage projects.
CASTOR Pilot Plant Objectives
The test facility was to prove long-term stable operation on coal flue gas and act as a test facility for dedicated tests (e.g. test of novel solvents). It was also vital to provide information about operation costs, maintenance costs, reliability, operation flexibility, environmental issues and engineering experience.
Four test campaigns have been conducted in CASTOR:
1000 hours using standard solvent ”30%-wt. MEA” (Jan. – March 2006)
1000 hours using standard solvent ”30%-wt. MEA” (Dec. 2006 – Feb. 2007)
1000 hours using novel solvent ”CASTOR 1” (April – June 2007)
1000 hours using novel solvent ”CASTOR 2” (Sep. – Dec. 2007)
Results: Stable operation on coal-derived flue gas is possible, and the impact of flue gas impurities can be handled.
Regeneration energy with MEA: 3.7 GJ/ton CO2 at 90% CO2 removal.
Small improvement in regeneration energy with CASTOR 2:
3.5 GJ/ton CO2 at 90% CO2 removal (further improvement plausible).
Efficiency penalty of power plant equipped with CO2 capture 10 %-points.
Four 1000 hours test campaigns with MEA and novel solvents have been conducted at the CASTOR pilot plant in Esbjerg. The campaigns have indicated that it is possible to develop solvents with greater chemical stability and with less corrosivity. It is also possible to develop solvents with less regeneration energy compared to MEA. However, it will be difficult to obtain major steps forward with solvent improvements alone.
CAESAR Objectives of Pilot Plant Testing in Esbjerg
Evaluate the potential of advanced absorption/desorption process configurations in pilot-scale. Also determine the performance of novel solvents in realistic operation conditions for future full-scale application in coal-fired power plants. Measure energy requirement and temperature levels for regeneration of the novel solvents. Monitor actual solvent degradation, losses and by-products, corrosion, fouling and emissions for novel solvents
Three test campaigns will be conducted in CAESAR:
2000 hours using standard solvent ”30%-wt. MEA” (March – July 2009)
2000 hours using novel solvent ”CAESAR 1” (Oct. – Dec. 2009)
2000 hours using novel solvent ”CAESAR 2” (Feb. – May 2010)