Date post: | 12-Jun-2015 |
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Project Integration
Technology Manager Olav Falk-Pedersen
The capture plant, integrationThe capture plant, integration
MHI
How does CO2 capture work?
Gas turbine exhaust gas (420MW)g ( )
Temperature, °C 105p ,Pressure, barg Atmospheric
Mass Flow Rate, kg/sec 694Composition (mass% / vol%)
Large volume flowLarge absorber diameter
High degradationNitrogen 73.6 / 74.8Oxygen 14.4 / 12.8
Carbon Dioxide 5.9 / 3.8Water 4 9 / 7 7
High absorberSpecial solvents
Water 4.9 / 7.7Argon 1.2 / 0.9NH3 5 ppmvSO 0 1 ppmv
High energy consumption
SO2 0.1 ppmvTotal NOx 2.0 ppmv Low degradation
Challenging to catch CO2 from flue gas
The space taken by 1 tonne of CO2 under
different conditions
Illustration source: Freund, Kaarstad “Keeping the Lights on”, Universitetsforlaget, 2007Illustration source: Freund, Kaarstad Keeping the Lights on , Universitetsforlaget, 2007
Absorber design:• Flow area: 240m2
• Height: 50-60m• Packing:
•One production line in one year•Lay down area 100 x 150 m
Energy ConsumptionReboiler:
•Heat input: 110-130 MWElectricity consumption:
•In the process: 12-13 MW•Compression: 15-17 MW•Power plant efficiency reducedPower plant efficiency reduced from 59 to 50%
Energy cost:•Cost of electric (NOK/kWh)•Cost of steam (NOK/ton)•Cost of steam (NOK/ton)•Energy cost:190 MNOK/year (24 MEURO/year)
Cooling water:• Sea water• Typically 22000 – 25000 m3/hour• Location of inlet and outlet (255MW)
Connection to HRSGConnection to HRSGStack DN7000
Duct DN6500Duct DN6500
Very sensible for changes in operating pressure (typical numbers gas turbine outlet):• Operating pressure approximately 46-47 mbar (g)• The maximum pressure fluctuations in normal operation shuld be +/- 0,2 mbar.• Increased back pressure at the gas turbine exhaust gas will reduce the gas Increased back pressure at the gas turbine exhaust gas will reduce the gas
turbine efficiency. The gas turbine will most likely shot down at an increase back pressure of approximately 13-20 mbar.
• The HRSG is not designed for vacuum• The HRSG is not designed for vacuum.
Connection to HRSG• Two proposed solutions:
100% f th h t t b t d t th t
Connection to HRSG
• 100% of the exhaust gas to be routed to the capture plant.L th 100% f th h t t b t d t • Less than 100% of the exhaust gas to be routed to the capture plant. Example:
9 % f f• Approximately 94% of the power plant flue gas routed to the CO2 capture plant.
• 90% recovery in the CO2 capture plant• 90% recovery in the CO2 capture plant• The overall CO2 recovery will meet the 85% overall
recovery requirementrecovery requirement
85% reduction in CO2 emissionsAvailability and capture rate
100
98
99
%
97
Tilg
jeng
elig
het %
95
96
9484,5 85,0 85,5 86,0 86,5 87,0 87,5 88,0 88,5 89,0 89,5 90,0
Capture rate %
Reduced production of electricityelectricity
CO2
Capture rate
CH4
Capture rate
Energy consumption/ton CO2
Reduction in power production/ton of steam extractedElectricity priceElectricity price
Dansk wind powerDansk wind power
TCM DA AmbitionsTCM DA Ambitions• Test, verify and demonstrate CO2
capture technology owned and marketed by vendors
• Reduce cost, technical, environmental and financial risks
• Encourage the development of market for CO2 capture a et o CO captu etechnology
• Aim at international deploymentAim at international deployment
International Co-operationInternational Co operation
75.12% 20% 2.44% 2.44%
Other potential partners to be invited
Specific Test ObjectivesSpecific Test Objectives• verify safe and stable continuous operation• identify and assess critical equipment• develop and validate modelling toolsdevelop and validate modelling tools• minimise energy demand and other operating costs• reduce capital costs• reduce capital costs
Two flue gas sources22 – 25 000 tonnes CO2 /yrRecycle
Combined Heat & Power plant (CHP)
Max 5% of total flowFrom one stack
28 – 56 000 Sm3/hr3.5 – 9 mole% CO2
Pre-treatment
Capture processes(amine or chilled ammonia)
3.5 9 mole% CO214.4 % O2
5 ppmv NOx≈ 0 ppmv SOx 74 – 82 000 tonnes CO2 /yr
Cracker (RFCC) Max 11% of total flow
22 50 000 Sm3/hr
Pre-treatment
Capture processes(amine or chilled ammonia)22 – 50 000 Sm3/hr
14 mole% CO24.2 % O2
75 ppmv NOx≈ 25 ppmv SOx
( )
Relevant for a number of industrial processes including gas and coal fired power plants.
Test Strategy – Overall ConceptTreated exhaust
gy p
Combined Heat & Power plant
(CHP)*
CO2 3.5% AmineCO2
Mobile Test Unit
Treated exhaust
Mobile Test UnitCO2
Treated exh.
CO2 12.9% Chilled Ammonia
exhaust
Cracker (RFCC) CO2
Total capacity 100 ktonnes CO2 per year
* CHP design capacity of 280MW electricity and 360MW heat.
Seawater
Area for future development
CHP (Powerplant)
Amine plant
Utilities
Refineryplant
Electricalsubstation
Admin complex
Piperacks
Chilled Ammonia plant
EVM Power plant
Mongstad Refinery
TCM
Project office rig
Aerial photo 29.11.2010office rig
Tie-in to plant operated by 3rd. party
22 - Classification: Internal 2010-09-29
Construction philosophyArea Philosophy
Amine plant Prefabricate modulesAmine plant Prefabricate modulesSite-build of foundationsSlip-form concrete structureSlip-form concrete structure
Chilled Ammonia plant Stick-build at siteSite-build of foundationsSite-build of foundationsSlip-form concrete structure
Utilities and infrastructure Prefabricate modulesUtilities and infrastructure Prefabricate modulesPrefabricate concrete elements
Prefabrication
PAU assembly at Aker Stord
Fabrication of equipment
Piperacks installedPiperacks installed
Mechanical installations
Seawater intake
Key figures for TCMKey figures for TCMTotal TCM
Structural steel tons 2 966Piping tons 1 174
El t i l bl 236 965Electrical cables m 236 965Instrument cables m 201 029Cable terminations no's 7 424Junction Boxes no's 616Junction Boxes no s 616
Instruments no's 3 904
Equipment tons 1 148
Purchased items no's 8 160( tilit l )(utility only)
Knowledge sharingKnowledge sharing• Co-operate with research organisations and other CCS projects • Participate in CCS conferences and give papers• Participate in CCS conferences and give papers• Keep outside world updated on status through website• Good communication with media and NGO’sGood communication with media and NGO s• Subject to vendor confidentiality agreements