Sorbent Polymer Composite Mercury and SO2 Control Installation and Full Scale Performance Update John Knotts - W.L. Gore & Associates, Inc. Gas Phase Filtration Technology Leader Chris Polizzi - W.L. Gore & Associates, Inc. Product Specialist - Membrane Technologies

Sorbent Polymer Catalyst (SPC) composite Four Part Technology ePTFE Sorbent Catalyst Chemistry Mercury Sorbent Captures elemental and oxidized mercury High capacity for mercury capture Does not require regeneration Chem-adsorbed SO2 Oxidation Catalyst Sulfur dioxide is converted into an aqueous sulfuric acid solution and expelled to SPC materials outer surfaces SO2 reduction is a co-benefit of this technology H2SO4 formation from humidified SO2 gas feed SPC Material – showing ePTFE, Sorbent and Catalyst 2

SPC System Background: Fixed Sorbent Technology Low pressure drop sorbent module Simple Passive Operation Tailpipe solution installed downstream of all process equipment Passive operation – no moving parts Does not require any injection of sorbents or chemicals Continuous mercury adsorption and SO2 removal for long periods of time without deactivation No need to inject any carbon for mercury control - avoids ongoing cost related to PAC supply No contamination of the Cement Kiln Dust with carbon No need to shuttle or waste any Cement Kiln Dust No additional differential pressure or pulsing requirement on filter bags from carbon injection System also address SO2 emissions without requiring any injection of sorbents or chemicals

Sorbent Polymer Catalyst (SPC) Composite Material Mercury Control Module Open Channel Design Low Pressure Drop

Scalable Sequestration and Removal Efficiencies Module Stack Height and Gas Velocity Impacts Removal Efficiency Example of Mercury Removal Efficiencies at Typical Process Velocities of 8-16 feet per second

In-Scrubber Power v. Stand-Alone Cement Approach Can be installed in existing Wet FGD (above Mist Eliminator) “Zero-footprint” approach Can be installed as stand-alone structure after Baghouse or ESP (gas cooling to less than 200 F required)

First Energy Fort Martin - Full Scale Installation Approach and Data Located in Maidsville, WV Two coal-fired units burning Bituminous coal Unit 1 online in 1967 and produces 552MW Unit 2 online in 1968 and generates 546MW Plant uses 2.8 million tons of high sulfur Eastern bituminous coal annually No SCR Configuration: Pulverized Coal Boiler – ESP – B&W WFGD – GMCS – Stack 3,294,000 acfm of treated airflow

Ft Martin Unit 1 Installation Approach

Installation Photos – GMCS Module Loading:

Installation Photos – GMCS Module Stacking:

Fort Martin – Unit 1 Full Scale Results Outage

American Electric Power Conesville - Full Scale Installation Approach and Data Located in Conesville, OH Units 5 - 430 MW Unit 6 – 430 MW Tangentially fired units In service since 1976 Cold side ESP Mg-enhanced lime wet FGD 2,580,000 acfm of treated airflow

Looking North at Scrubber 6B Pltf. El. 829’-6” Pltf. El. 821’-6”

AEP Conesville – Unit 6 Full Scale Results 16

Cement - Full Scale Installation Approach and Data 2,000 Gore Modules

Cement Installation Approach – Elevation View

Installation Approach – Plan View

Installation Approach – Flow Diagram

Cement Data – 4 Module Stack Days 21

For Questions Please Contact: John Knotts - W.L. Gore & Associates, Inc. jknotts@wlgore.com

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