CARBON CAPTURE PHYSICAL SOLVENT SCRUBBING SIMULATION SELEXOL PROCESS

CARBON CAPTURE POLITICS One quarter of the world’s coal reserves are in the United States. The energy content of the nation’s coal resources exceeds that of all the world’s known recoverable oil. www. energy. gov During his campaign for the Presidency, George W. Bush pledged to commit $2 billion over 10 years to advance clean coal technology Dept. of Energy, Electric Power Research Institute, Coal Utilization Research Council Critical Technology Needs Integrated Plants Module designs, Systems Integration, high temperature materials, Plant Simulation Capability, sensors & controls, intelligent plant operation In the coming years, power companies are to build about 150 coal plants to meet the growing electricity demand. Despite expectations almost none of the plants will be built to capture thousands of tons of carbon dioxide that will be generated. NYT, Feb. 20, 2007

GLOBAL CO 2 EMISSIONS Global CO 2 Emissions from Fossil Fuels in E 10 tonne CO 2/yr

US POWER GENERATION AND CO 2 EMISSIONS PROFILE

CO 2 CAPTURE & SEQUESTRATION

COAL GASIFICATION & SYNGAS CYCLE

INTEGRATED GASIFICATION COMBINED CYCLE

GAS ABSORPTION PROCESSES FOR CO 2 REMOVAL Process (and solvent) Sulfinol (MDEA-accelerator) Selexol (PEGDME) Rectisol (Cold Me. OH) Purisol (N-methyl-2 -pyrrolidone) Catacarb (Hot K 2 CO 3 -activator) Benfield (Hot K 2 CO 3 -inhibitor) Amines Owner Use Shell Natural-refinery-syn gases UOP Natural-refinery-syn gases Linde Heavy oil partial oxidation Lurgi Gasification Lurgi Natural-refinery-syn gases Eickmeyer Any mixed-gas stream UOP Natural-refinery-syn gases-H 2 Any mixed-gas stream

SELEXOL TM SCRUBBING

CO 2 CAPTURE VIA SELEXOL TM SCRUBBING

DESIGN PROCEDURE

CO 2 PHASE DIAGRAM Operating Points

SOLUBILITY OF GASES IN SELEXOL TM SOLVENT

Components 1483 Clariant Genosorb 1753 Clariant CHEMCAD User Switzerland & Germany

SULZER COLUMN INTERNALS M 500 Y

SULCOL COLUMN SIZING Liquor Flow = 54600 gpm Gas Inlet = 245097 scfm Gas / Liquor = 4. 5 scfm / gal Selexol Sulzer use CHEMCAD in Switzerland, Italy & Singapore

SIZING CASE

SELEXOL CO 2 ABSORPTION SIMULATION COMMENTS 1. NRTL bip regression method for partial pressure needed 2. CO 2 User Component (UC) behaviour to validate 3. SCDS Mass Transfer convergence sensitive with (UC) 4. SCDS Mass Transfer matrix report to be simplified 5. PR (H 2 O Immiscible) with special bip feature to prove 6. Henry’s Law Coefficients for User Components 7. Random and structured packing data very limited 8. Sulzer packing sizing link needs finishing