benchmark study and emissions at tcm - ukccsrc...benchmark study and emissions at tcm...
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Benchmark study and emissions at TCM UK-Canada-Norway meeting on CO2 capture research 18-19th March 2015 Berit Fostås, Statoil ASA 2015-03-13
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R&D on CO2 Capture Technology in Statoil • CO2 Capture Technology improvement through
testing and learning at TCM
• Supporting Oxy-combustion Once Through Steam Generation (OTSG) demonstration project at Cenovus Energy’s Christina Lake oil sand operation. Test campaign planned to be finalized this spring.
• Contribute to development of some promising but still immature technologies by “open innovation”:
− CO2 membranes at NTNU with Air Products
− Better solvents in MoSolv project
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Statoil’s main focus on CO2 capture is TCM • Why focus on post combustion?
− Be able to capture CO2 from Natural Gas based energy systems
• CO2 capture technology improvement through testing and learning at TCM:
− Established amine (MEA) baseline as a benchmark/reference and TCM DA is sharing the test results
− Cost reduction through operating experience and multiple incremental technology improvements
− Test new solvents and allow modifications of the plant to better fit improved solvents
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TCM is the world’s largest facility for testing and improving CO2 capture. Knowledge gained will prepare the ground for CO2 capture initiatives to combat climate change world wide.
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Technologies tested at TCM
• From start-up August 2013 until March 2015:
− Aker Solutions tested two novel solvents (> 3000 hrs per solvent)
− Aker Solution and TCM Owners tested MEA and established a new MEA reference (2000 hrs)
− Alstom finalized testing of CAP (> 6000 hrs)
− Shell Cansolv test with advanced solvent is ongoing
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MEA baseline testing
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Test Matrix
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MEA – Main results • TCM has produced and published results for CO2 capture from gas turbine flue gas
by 30 w% MEA solvent system
• Minimum Steam Reboiler Duty for aqueous 30 wt% MEA (> 85% CO2 capture rate, )
− Without antifoam: 4.1 MJ/kg CO2
− With antifoam: 3.7 MJ/kg CO2
• Minimum Steam Reboiler Duty for aqueous 40 wt% MEA (> 85% CO2 capture rate)
− With antifoam likely still active, 3.4 MJ/kg CO2 steam consumption was measured
• Impact on Steam Reboiler Duty : − Increased absorber packing heights resulted in lower SRD
− Decreased flue gas supply temperature resulted in lower SRD
− Higher MEA concentration resulted in lower SRD and L/G ratio
• Independent verification work conducted by EPRI (Electric Power Research Institute)
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Emission – Most important Risk Factor
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Air: 0.3 ng/m3 Water: 4 ng/l
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MEA baseline: typical emission performance • Emissions from the TCM plant are followed up by use of:
− On-line measurements (FTIR, PTR-TOF-MS (UiO), other) − Isokinetic sampling campaigns and off-line measurements
• TCM lab measurements • Third party measurements (SINTEF, Ramböll, FORCE, etc.)
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MEA 0.02 ppmv NH3 10 ppmv Alkylamines 0.002 ppmv Acetaldehyde 0.2 ppmv Formaldehyde 0.1 ppmv Total nitrosamines < 0.00008 mg/m3 Total nitramines < 0.0002 mg/m3
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Conclusions
• 30 w% MEA baseline established at TCM:
− Flue gas: 47.000 Sm3/h and about 3.5 vol% CO2
− 90% capture rate and SRD of 4.1 GJ/t CO2 (without anti-foam)
− Emissions effectively stopped by the two stage water wash section (6m packing):
• Very low emissions of MEA (ppb range)
• Emissions of nitrosamines and nitramines below detection limits (< 20 pptv)
− Emissions were within the limits set by the Norwegian environmental authorities
• Proves full-scale CO2 capture operations technically and environmentally possible for treatment of gas-turbine flue gas
• Following process aspects not concluded; long term performance indices (corrosion, degradation, etc.), use of anti-foam solutions, use of lean vapor compressor, etc.
− Use of anti-foam solutions provided SRD down to about 3.7 GJ/t CO2
− Use of 40 wt% aq. MEA provided SRD down to about 3.4 GJ/t CO2
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Results presented at GHGT-12 and ADIPEC
• GHGT www.ghgt.info in Oct 2014: − Results from MEA testing at the CO2 Technology Centre Mongstad. Part I:
Post-Combustion CO2 capture testing methodology − Results from MEA testing at the CO2 Technology Centre Mongstad. Part II:
Verification of baseline results − Results of amine plant operations from 30 wt% and 40 wt% aqueous MEA
testing at the CO2 Technology Centre Mongstad − Emission results of amine plant operations from MEA testing at the CO2
Technology Centre Mongstad − Results from testing of Aker Solutions advanced amine solvents at CO2
Technology Centre Mongstad • ADIPEC www.adipec.com in Nov 2014:
− Scale-up and Transient Operation of CO2 Capture Plants at CO2 Technology Centre Mongstad
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Presentation title
Presenters name Presenters title E-mail address ……@statoil.com Tel: +4700000000 www.statoil.com
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TCM emission permit • TCM was granted an emission permit for the CO2 capture plant from the
Norwegian government in 2012. For the first time health risk of nitrosamines and nitramines was addressed.
• Final permit approval and conditions:
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