Carbon Capture Systems by Alstom – Clean Power Solutions Jean-Michel Aubertin San Francisco, Aug 5th, 2008 POWER SYSTEMS

CO2 Capture Solutions Power Plant with CO2 capture SOLUTIONS DEVELOPED BY ALSTOM Post - combustion Oxy - combustion Pre - combustion (New+retrofit) (New + retrofit ) Everyone here might not be familiar with the 3 major Capture technologies Post C capture involves conventional plants. The technology is a back-end solution that treats the flue gas produced in a PC PP. In oxy C, the fuel is combusted with pure O. After condensation of the water a rather pure stream of CO2 is obtained, ready for compression and storage. In pre-C, the fuel, usually coal is converted into a synthesis gas by gasification. This synthesis gas is upgraded to hydrogen through a CO shift reaction, and CO2 is removed before the hydrogen combustion in a CC Plant. This process, is also called IGCC (..) and applies only to New Plants Needless to say each has its advantages and disadvantages, each has its supporters and detractors. There seems to me to be no point in going through these issues here, as we see a role and a place for each, with each needing its R&D, and demonstration prior to companies such as ALO being able to offer a commercial product. Several solutions are being pursued in the industry for CO2 Capture, ALSTOM has given R&D priority to those solutions having also a retrofit potential on the installed base, like oxy-C and post C (New only) Source: Vattenfall Source: Vattenfall Source: Vattenfall Source: Vattenfall CCS solutions must adapt on installed base Carbon Capture Systems by Alstom - 20/09/2018 - P 2

Main partnerships & Projects Stanford (US) - Gas and Coal 0.25 MWt Pleasant Prairie (US) - Coal 5 MWt Mountaineer (US) - Coal 30 MWt CHILLED Northeastern (US) - Coal >200 MWe AMMONIA Transalta (Canada) - Coal 200 MWe Karlshamn ( Sweden ) - Gas 5 MWt Mongstad ( Norway ) - Gas 40 MWt ADVANCED Joint Development Partnership 30 Mwt AMINES In Negotiations >150 Mwe Schwarze Pumpe (Germany) - Coal 30 MWt OXY - COMB 250 MWe Jänschwalde Feasibility Study Carbon Capture Systems by Alstom - 20/09/2018 - P 3

Chilled Ammonia Development Roadmap Jul 06 Aug 06 2008 2009 2015 IGR SGR CGR DGR FGR 1 SRI Small Bench Start detailed engineering June 06 Nov 06 June 08 Test Plant Start-up 2 Large Bench Scale (SRI) Tests completed Jul 06 Jan 07 June 08 March 09 3 WE Energies Validation Pilot Coal - (15,000 TPY) Oct 07 4 AEP Mountaineer - COAL (100,000 TPY) May 07 July 07 3 E.ON Validation Pilot OIL/GAS (15,000 TPY) Nov 07 4 StatoilHydro Mongstad -GAS (80,000 TPY) Transalta (1 500 000 TPY) 2015 AEP Northeastern (1 500 000 TPY) Carbon Capture Systems by Alstom - 20/09/2018 - P 4

Chilled Ammonia field pilot at We Energies Designed to capture up to 15,000 tons/year of CO2 Testing to continue through 2008 Key Objectives: Proof of Concept Conduct long-term tests to establish process integrity Measure energy consumption Develop techno-economic analysis to scale the system for commercial applications We Energies Pleasant Prairie Power Plant (P4) Carbon Capture Systems by Alstom - 20/09/2018 - P 5

Field Pilot at We Energies Carbon Capture Systems by Alstom - 20/09/2018 - P 6

Absorption Carbon Capture Systems by Alstom - 20/09/2018 - P 7

Advanced Amines Development Roadmap Sep 07 Nov 07 June 08 2009 2015 IGR SGR CGR DGR FGR Technology Licensing Test Plant Start-up 1 Tests completed Sept 07 July 08 2 Pilot test at UT 3 100,000 TPY VALIDATION Commercial Scale Unit > 150 MW Carbon Capture Systems by Alstom - 20/09/2018 - P 8

Amine Based Processes Amine CO2 capture is proven Retrofitable Installed on a few plants burning coal High energy demand for regeneration Exclusive partnership with DOW Advanced Amines Improved Process Plant Integration PP Esbjerg Denmark 1 t CO2/h pilot plant (CASTOR EU-FP6) Warrior Run, Maryland AES CFB w/MEA CO2 separation SHADY POINT, OKLAHOMA, USA AES CFB w/ MEA CO2 separation Carbon Capture Systems by Alstom - 20/09/2018 - P 9

One Megawatt Pilot Facility – at University of Texas Carbon Capture Systems by Alstom - 20/09/2018 - P 10

Oxy-Combustion Oxy-PC: Demonstration 30 MWth: Vattenfall Demonstration/Validation program Goal: validation and improvement of oxyfuel process starting 2008 Main features 5,2 t/h solid fuel 10t/h oxygen 40 t/h steam 9 t/h CO2 ALSTOM supplies the oxy-boiler and ESP Owner: P. Paelinck/JF Leandri/A.Schimkat Large quantity of O2 required CO2 separation with no use of chemicals Smaller boiler and flue gas volume reduction (Low NOx) On 20 September 2007, Vattenfall successfully installed the combustion chamber into the oxyfuel-boiler on the construction ground of the Schwarze Pumpe CO2-free pilot plant in Germany. The combustion chamber that weighs 23 tons was lifted into the boiler-house by a 600-ton-crane. Overall, the oxyfuel-boiler has a height of 25 metres, which made the process a logistic challenge. The whole process took about two hours and 30 people were involved to make it possible. The two CO2-capture tanks were installed on the same day. The combustion chamber was delivered by Alstom Power Boiler in Stuttgart, who will deliver the electrostatic precipitator for the flue gas as well. Source: Vattenfall Carbon Capture Systems by Alstom - 20/09/2018 - P 11

Vattenfall 30 MWth Oxy-fuel Carbon Capture Systems by Alstom - 20/09/2018 - P 12

Vattenfall 30 MWth Oxy-fuel Carbon Capture Systems by Alstom - 20/09/2018 - P 13

OxDP Study 250 MWe Jänschwalde – Oxy-fuel Fuel Lignite (12% Water) Steam Mass Flow 815 t/h SH/RH Temperature 535/540°C SH/RH Pressure 165/40 bar Load Range (w/o Support) 60-100% DeNOx SCR O2 purity 95% / 99.5% CO2 Capture Rate >90% CO2 Product Purity >95% - Feasibilty study, started 1st of May 08, funded by Vattenfall Carbon Capture Systems by Alstom - 20/09/2018 - P 14

Oxy-combustion: oxyfired CFB Owner: P. Paelinck/JF Léandri Several projects at 30-75 MWth scale in preparation Carbon Capture Systems by Alstom - 20/09/2018 - P 15

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