Cansolv Technologies Inc. Alberta NOx and SOx Control Technologies Symposium April 9, Rick Birnbaum

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1 A Novel SO 2 Scrubbing Process For Industrial SO 2 Emission Control Alberta NOx and SOx Control Technologies Symposium April 9, 2008 Rick Birnbaum rick.birnbaum@cansolv.com

2 OUTLINE Gas Absorption Solutions CANSOLV Technologies Inc. SO 2 Scrubbing Amine Chemistry SO 2 Scrubbing Flow Sheet and Comparison to Conventional H 2 S Amines Applications for CANSOLV SO 2 Scrubbing System in Various Industrial Applications Operating Units CANSOLV CO 2 Capture System

3 COMPANY HISTORY Gas Absorption Solutions Cansolv SO 2 Scrubbing System invented in 1988 at Union Carbide Key employee buyout of technology in 1997 Technology Optimization 3 startups in startup in startups in startup in startups to come in 2008

4 CANSOLV SO 2 SCRUBBING SYSTEM A regenerable SO 2 absorption process Similar to H 2 S/CO 2 amine treaters Uses conventional equipment Aqueous diamine solvent is highly selective for SO 2

5 CANSOLV SO 2 SCRUBBING SYSTEM Pure, water-saturated SO 2 byproduct A very robust, easy to operate process Almost zero emissions at low cost Patented technology

6 PROCESS CHEMISTRY Gas Absorption Solutions Identical in concept to Amine/H 2 S chemistry Operates at ph range of 4.8 to 5.2 vs 9.7 to 11 Aqueous diamine solvent solution Buffering provides high capacity for SO 2 absorption Proprietary solvent has the proper absorption/desorption strength Solvent amine is non-volatile since it is always in salt form Regeneration provides pure, water saturated SO 2 as byproduct

7 AMINE ABSORBENT Gas Absorption Solutions The unique diamine absorbent is the key to the CANSOLV SO 2 Scrubbing System technology The first amine group is always in salt form providing absorbent non-volatility The second amine has the optimum strength for balanced absorption and regeneration

8 CANSOLV SO 2 Scrubbing System Flow Diagram Prescrubber Amine Purification/ Unit (APU) Regen O/H System Amine Absorber Regenerator To SO 2 Conversion Flue Gas Clean Flue Gas To Stack Hot Atm Pr. May be dusty Contains H 2 O SO 2 and SO o C mm H 2 O Pr < 30 mg/nm3 Dust Water saturated APS Sulfur Containing Fuel or Feed Stream Combustion And Heat Recovery Gas Cleaning And Cooling Steam Combustion System Boiler, Heater, Combuster, Incinerator, Catalyst Regenerator Flue Gas Pretreatment Heat recovery - WHB Dust removal - Open/Vent Prescrub SO 3 removal - SBS/WESP/Candles SO 2 Management SO 2 Capture SO 2 Regeneration

9 COMPARISON OF AMINES CANSOLV PROCESS Diamine salt absorbent Absorbent non-volatile CONVENTIONAL AMINE MEA, DEA, MDEA Amine volatile 100% slip of CO 2 Stainless steel metallurgy Corrosion allowance minimal No Fe S formation Only source of solids is feed gas Filter lean amine stream Difficulty in slipping CO 2 Carbon steel metallurgy Corrosion allowance important Fe S formation Fe S precipitation and scaling source of solids Filter lean amine stream

10 COMPARISON OF AMINES Gas Absorption Solutions CANSOLV PROCESS CONVENTIONAL AMINE Rate of formation of HSS high due to oxidized gas feed Low rate of HSS formation Reclaiming not essential Continuous reclaimer (ED) Amine stable to O 2 Amine degradation lower by factor of 2 to 3 Amine not stable when exposed to O 2 Amine degradation important Operation and control similar Can achieve low (<10 ppmv ) SO 2. Not used for H2S.. Foaming not an issue Operation and control similar Can achieve low ppmv H 2 S but CO 2 can be a problem Foaming often a problem

11 APPLICATIONS Gas Absorption Solutions Power Boiler Emission Reduction Refinery FCCU Regen Gas Copper and Lead Smelting Off gas Claus SRU Tail Gas Sulfuric Acid Tail Gas Pulp and paper SO 2 Capture

12 CANSOLV SO 2 SULFUR EMISSION MANAGEMENT Application Criteria Benefits Boiler/Htr Systems SO 2 - High sulfur fuel - Poor access to limestone - Access to H 2 SO 4 market Fire high sulfur fuels Earn revenue from acid FCC Regen Gas SO 2 - High sulfur cat feed - Poor access to waste disposal sites Incorporate SO 2 into existing sulfur systems Claus Tail Gas SO 2 - >99.9% S capture required - Increase capacity in SRU - Treats other sulfur streams Fewer exceedences Can use sour gas for TOX H 2 SO 4 Tail Gas SO 2 - Treats to <10 ppm SO 2 - Poor access to byproduct markets Can retrofit existing single absorption acid plant

13 CANSOLV SO 2 Power Boiler System Flow Diagram Utility Boiler Economizer Air to Air Exchange ESP Prescrubber Amine Absorber Amine Purification/ Unit (APU) Regenerator Regen O/H System To SO 2 Conversion To Stack Fuel APS Air Bottom Ash Combustion System Boiler Air to Air Exchange Fly Ash Wash H 2 O Waste H 2 O Flue Gas Pretreatment SO 3 removal - SBS/WESP Dust removal - Dry ESP Quench/Cool - Prescrub SO 2 Management SO 2 Capture SO 2 Regeneration Steam

14 CANSOLV SO 2 FCCU Regen DeSOx System Flow Diagram Cat Regen CO Boiler Heat Recovery ESP Prescrubber Amine Absorber Amine Purification/ Unit (APU) Regenerator Regen O/H System To SO 2 Conversion CO Boiler To Stack APS Cat Regen Steam Air FCC Catalyst Regenerator Fly Ash Wash H 2 O Waste H 2 O Flue Gas Pretreatment SO 3 removal - SBS/WESP Dust removal - Dry ESP Quench/Cool - Prescrub SO 2 Management SO 2 Capture SO 2 Regeneration

15 Air Amine A/G SWS A/G Reactor WHB Gas Absorption Solutions Sulfur 1st Stage Sulfur 2nd Stage Sulfur 2 Stage Claus with CANSOLV and Acid Gas Bypass Requires two stage thermal oxidizer for NH3 destruction Increases SO 2 Recycle to 10% of total Sulfur Reduces combustion air requirement by nearly 33% increases Claus Capacity by ~15% To Stack Regenerator Amine Absorber Venturi Prescrubber Cooler and SO 3 Removal Incinerator/ Waste Heat Boiler Purge Air Fuel

16 Smelter/Sulfuric Acid Tail Gas ABSORPTION COLUMN LEGEND Gas Phase Liquid Phase Amine Treated Gas to Stack Impurities to Blowdown AMINE PURIFICATION UNIT REGENERATION COLUMN SO 2 Product Steam M/U Water Rich Amine Acid Plant Tail Gas Lean Amine Condensate Smelter Off Gas GAS CLEANING DRYING TOWER ACID PLANT 98% H 2 SO 4

17 Commercial Units Application Gas Absorption Solutions Location Flow (Nm3/hr) Size MW equiv SO 2 Concentration Target SO 2 Emissions Status Incinerator Tail Gas (Claus) Belgium 12,000 n/a 1 % <30 ppm Oper. since 2002 Concentrated Acid Gas Canada 6,000 n/a 8-10% 30 ppm Oper. since 2002 Acid Plant Tail Gas US 40,000 n/a 5000 ppm 15 ppm Oper. since 2002 FCCU CO Boiler Flue Gas Coker CO Boiler Flue Gas Metallurgical Off-gas Claus plant tail gas Anode Furnace Off- Gas US US 430, ppm 25 ppm Started up Sept India US China 740,000 33,700 18,000 43,000 n/a n/a ppm 25 ppm Started up Dec n/a 0.1 to 12.5 % 4% 900 ppm-1.92% 150 ppm 200 ppm 100ppm Started up Dec Started up July 2006 In Startup

18 Application Location Flow (Nm3/hr) Size MW equiv SO 2 Concentration Target SO 2 Emissions Status Cogen boiler flue gas China 936, ppm 140 ppm Procurement Catalyst recovery roaster Canada 48,000 n/a 9100ppm 100ppm Construction Metallurgical Off-gas China 83,000 n/a 1000ppm / 5.5% 140 ppm Engineering Catalyst Recovery Roaster US 220,000 n/a 3000 ppm 100 ppm Engineering FCC Regen Gas DeSOx India 1,550,000 n/a 3000 ppm 100 ppm Engineering FCC Regen Gas DeSOx US 560,000 n/a 1500 ppm 10 ppm Engineering

19 Commercial Unit Operation Overview

20 CANSOLV SRU Tail Gas Unit - Antwerp Belgium

21 SO 2 Capture and Transport - Quebec

22 Spent Acid Regeneration Tail Gas Wilmington CA

23 Lead Smelter Off-Gas Plant Rajastan India

24 Refinery USA FCC Regen Off-Gas Fluid Coker Off-Gas

25 SRU Tail Gas Scrubber, Refinery Washington State, USA

26 CHINA GRASS ROOTS COPPER ANODE FURNACE

27 CANSOLV CO 2 Scrubbing System Statoil, Shell assemble carbon frontrunners courtesy Statoil A mobile carbon-scrubbing construction will be tested in May at the Shell- Statoil carbon-dioxide project at Risavika, just outside Stavanger, it was learned Tuesday. Canadian supplier Cansolv is one of three suppliers to the full-scale Halten CO2 project at Tjeldbergodden central Norway. Mitsubishi Heavy Industries and Fluor are the other carbon sequestration companies employed in the tests. The companies are vying for a contract to stop 2.5 million tonnes a year from flowing into the atmosphere at a future 850 Megawatt gas-plant on the Tjeldbergodden site. Cansolv is dwarfed by the two industrial giants, but sits on solid knowledge on the separating of carbon from natural gas, although the plan is to separate 85 percent of the C02 from the power plant s exhaust passages.

28 Treated Gas to Stack Impurities to Blowdown REGENERATION COLUMN CO2 to Compression ABSORPTION COLUMN AMINE PURIFICATION UNIT Water Wash Lean Amine CO2 Absorber Rich P/A Feed Gas Contact Cooler Steam Feed Gas from SO2 Absorber Condensate Purge Water Rich Amine LEGEND Gas Phase Liquid Phase Amine

29 Treated Gas to Stack Impurities to Blowdown CO 2 Regenerator Column CO 2 Product ABSORPTION COLUMN CO 2 AMINE PURIFICATION UNIT Water Wash Steam Cond. Feed Gas In Line Quench Impurities to Blowdown SO 2 Product SO 2 AMINE PURIFICATION UNIT SO 2 Regenerator Column LEGEND M/U Water Gas Phase Liquid Phase SO 2 Amine CO 2 Amine Rich Amine Steam Condensate

30 QUESTIONS?

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