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Post-Combustion CO 2 Capture using Solid Sorbents Sharon Sjostrom, Chief Technology Officer CREA Energy Innovations Summit, October 27, 2014 Carbon Capture: Around the Corner or Around the Bend?

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Phase I: Concept Phase II: Pilot Testing (1 MW) Phase III: Demonstration (> 25 MW) Commercial Implementation Development Approach Begin with the end in mind Identify cost drivers Focus R&D and execute work schedule with commercialization goal in mind DE-FE0004343 2014 ADA-ES, Inc. All Rights Reserved

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Post-Combustion CO 2 Capture Emission Control SO 2, NO x, Hg, Particulate STEAM WATER Coal* 50% C 20% H 2 O 12% O 2 5% Ash 3% H 2 (S, Hg) * Coal composition varies greatly with grade and source. CO 2 Capture Air 78% N 2 21% O 2 Purified CO 2 to Storage/EOR/etc. Regeneration Flue Gas 12% CO 2 74% N 2 12% H 2 O 4% O 2 CO 2 Solids functionalized with amines react with CO 2 at low temperatures Solids are heated to reverse reaction with CO 2 Temperature swing adsorption (TSA) Solids functionalized with amines react with CO 2 at low temperatures Solids are heated to reverse reaction with CO 2 Temperature swing adsorption (TSA) 2014 ADA-ES, Inc. All Rights Reserved

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Flue gas passes through adsorber module where sorbent particle adsorbs CO 2 Regenerable solid sorbent cycles between adsorber and regenerator. Increased temperature in regenerator releases CO 2 Flue Gas Flue Gas Preparation CO 2 Adsorber Baghouse Regenerator BaghouseCO 2 Compression CO 2 Storage Flue Gas CO 2 Solid Sorbent Heat Exchanger Process Blower ADAsorb Process Flue Gas CO 2 Sorbent Patent Pending Design 2014 ADA-ES, Inc. All Rights Reserved

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Pilot Construction Activities Pilot designed in modules Off-site fabrication 2014 ADA-ES, Inc. All Rights Reserved

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Pilot Module Transport 9-24-2013 2013 ADA-ES, Inc. All Rights Reserved

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Construction at Southern Company Host Site 2014 ADA-ES, Inc. All Rights Reserved

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Process Validation through Pilot Testing Phase II Progress System Design: 2012 Pilot Construction: 2013 Sorbent Prep and Testing: 2013-2014 Testing: 2014 3-D Process Model 2014 ADA-ES, Inc. All Rights Reserved

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Stantec Consulting, Ltd. o Cost Analysis, Plant Integration Owners Engineer Perspective McAbee Construction Pilot fab and installation EPRI o Technical Advisor o Cost Share o Independent Performance Evaluation and Techno- Economic Assessment Southern Company o Host Site, Cost Share Luminant o Cost Share DOE NETL o Project Sponsor ADA-ES, Inc. o Project Management o Developed Process Concept o Sorbent Eval & Selection o Process Validation Testing o Techno-Economic Assessment o Cost Share Technip Stone and Webster Process Technology o Detailed Engineering Services Significant Experience with Fluidized Bed Reactor Design Project Team 2014 ADA-ES, Inc. All Rights Reserved

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Is CO 2 Capture Around the Corner, or Around the Bend? Post-combustion controls must be included in any plan for significant CO 2 reductions Current regulatory landscape is slowing development Proposed GHG regulations for new plants and cost of gas in US restricts development Proposed regulations for existing plants do not present a clear commercial market for controls Will final regulations and oil prices support use of fossil-generated CO 2 ? 2014 ADA-ES, Inc. All Rights Reserved

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Thank You Sharon Sjostrom CTO sharons@adaes.com 2014 ADA-ES, Inc. All Rights Reserved