Re Act 2010 Abb

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An abbreviated presentation which displays the key features of our ReACT multipollutant control technology. Keep an eye on this one.

An abbreviated presentation which displays the key features of our ReACT multipollutant control technology. Keep an eye on this one.

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  • 1. Regenerative Activated Coke Technology ReACTtm Advanced Multi-Pollutant Control Technology Hamon Research-Cottrell
  • 2. Hamon Research-Cottrell Particulate Control Low pressure High Volume pulse jet filters Electrostatic Precipitators Recent Clients NOx control SNCR Utilities U2A Urea to Ammonia systems Pacificorp FGD and multipollutant control Arizona Public Service Refineries Nevada Power Refinery Scrubbers (ExxonMobil WGS) ExxonMobil Tri-States Generation Dry systems (J-Power Entech ReACT) Shell Minnesota Power Conoco Phillips Dairyland Power Valero Consumers Energy BP Alliant Energy Marathon Dominion Energy PEMEX Pennsylvania Power & Light Tesoro Mirant Syncrude Detroit Edison Duke Energy Florida Power & Light
  • 3. Old 2x265MW New 2x600MW 230m (750ft ) Isogo Power ReACT 480m (1580ft ) ReACT Station
  • 4. ReACT System Flow Adsorption Regeneration By-Product Recovery Activated Coke AC AC Lock Hopper Regenerator *1 *2 NH3 Hot Air By-Product SO2 Rich Gas Off-Gas *1 Recovery Unit Exhaust Gas Adsorber Clean Gas Hot *3 Stack Gas BUF *2 AC Hopper By-Product Air Lock Furnace Fuel AC Hopper Particulates AC Fines Separator *3 Balance of plant systems not shown Ammonia supply Nitrogen Acid plant
  • 5. ReACT Typical Layout Two adsorber casings Two - four regenerators Regenerator auxiliaries 600 MW fits in one acre plot
  • 6. Isogo Unit #1 (2002)
  • 7. Adsorption and reaction on activated coke SO2 and SO3 are adsorbed at high efficiency on the activated coke surfaces as sulfuric acid ,ammonium sulfate, and ammonium bisulfate. SO2 + H2O + 1/2 O2 H2SO4* SO3 + H2O H2SO4* H2SO4* + NH3 NH4HSO4* NH4HSO4* + NH3 (NH4)2SO4* (* denotes adsorbed species) The catalytic effect of activated carbon also leads to reduction reactions to reduce NOx in the presence of ammonia. The NOx control activity is completed in the adsorber. NO + NH3 + 1/4 O2 N2 + 3/2 H2O NO + C..R N2 (C..R epresents a surface functional site)
  • 8. Adsorber Activated Coke Bed Activated Coke Inlet Sub Louver Perforated Plate Flue Gas Inlet Flue Gas Outlet Inlet Louver Sub Louver Inlet Louver Activated Coke Bed Perforated Plate Roll Feeder Activated Coke Outlet
  • 9. Thermal regeneration of activated coke At the temperatures in the regenerator heating section adsorbed sulfuric acid ,ammonium sulfate, and ammonium bisulfate are decomposed to SO2. Activated coke pellets enters via lock hoppers and is in gravity counterflow against desorbed gases and N2 carrier gas. Sulfur rich gas containing SO2, CO2, N2 and H2O exits the regenerator to an acid plant under its own pressure. H2SO4* + 1/2 C SO2 + 1/2 CO2 + H2O (NH4)2SO4* SO3 + NH3 + 2 H2O NH4HSO4* SO3 + 2 NH3 + H2O 3 SO3 + 2 NH3 3 SO2 + 3 H2O + N2 (* denotes adsorbed species) Non isothermal desorption kinetics show peak rates at 300C and completion by 450C
  • 10. ReACTtm Advanced multi-pollutant control technology Activated coke quality Initial charge – high activity Make up – lower activity allows wider sourcing Steady state AC develops over time Activity improves with use With successive regeneration cycles General material size decreases to a steady state and total surface per unit bed volume Residual sulfur, oxygen and ammonia functional groups accumulate on the used surfaces New pores open as some carbon is used in H2SO4 -> SO2 reactions Resulting SOx, NOx, and Hg activity increases Fines separation at base of regenerator Activated coke is discharged through a lock hopper to fines separation Hg free fines can be burned for fuel value Nominal AC fines loss ~1% of AC circulation
  • 11. ReACTtm Advanced multi-pollutant control technology Fully dry adsorption based system no water evaporated into flue gas, (water at 1% of WFGD, DFGD) no sprays, no slurry preparation no water vapor plume, no acid plume SOx >>95% SO2 control near zero SO3 emission carbon steel flue gas path including stack NOx Nominal 20-40% control as co-benefit for compliance or for NOx credits can boost to >60% with incremental NH3 Net PM reduction Additional collection of fine particulates and trace metals Hg control with waste volume minimization 95% control of both elemental and oxidized forms as co-benefit Hg waste volume minimized (<0.1 ton/MW/year) Thermal regenerative system Reduced reagent and disposal material volume Sulfur rich gases go to acid plant producing significant byproduct revenue
  • 12. Regenerative Activated Coke Technology ReACT Advanced Integrated Multi-Pollutant Control Technology