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