meeting staged co2 capture requirements with the uop
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Meeting Staged CO2 Capture Requirements with the UOP SELEXOL™ Process
Meeting Staged CO2 Capture Requirements with the UOP SELEXOL™ Process
© 2009 UOP LLC. All rights reserved. UOP 5254-01
Gasification Project CO2 Considerations
CO2 capture or CO2 capture ready? CO2 capture level? CO2 quality requirements?Detailed evaluations with Selexol:
– IGCC Design Considerations for CO2 Capture—EPRI Interim Report March 2009
– Optional Carbon Capture, IChemE 2007(T. Alderson, S. Scott & J. Griffiths, Jacobs)
– Co-production of hydrogen and electricity with CO2 capture, IChemE 2007(S. Arienti & P. Cotone, FWI – J. Davison, IEA)
UOP 5254-04
CO2 Capture and Sequestration (CCS) –Typical Gasification Complex
Coal or PetCoke,Biomass
O2
Treated Syngas
Sulfur
H2S
Raw Syngas
CO2
Gasifier SourShift
Air Separation
Tail Gas
Selexol Unit
Sulfur Recovery
No Shift, Full Shift or Partial Shift
Typical Raw Syngas H2 30 - 50% CO 30 - 50% Ar 0.5 - 1% N2 0.7 - 1.5% CO2 5 - 19% H2S 0.5 - 2% COS 200-1000 ppmv Ni & Fe Carbonyls HCN, NH3 ...
Applications: Power Chemicals Hydrogen Liquid Fuels etc
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Designing for CO2 Capture Ready
CO2 capture should be based on proven technology Should not result in underutilization of major
equipment Initial investment and operating costs should
be minimized Additional plant space will be needed
UOP 5254-07
SELEXOL can meet all these criteria
CO2 Capture Ready Design
How UOP looks at the problem……1. Initial design without CO shift
- Minimizes pre-investment - Moderate chilling can be considered
2. With CO shift, pre-investment in sulfur section- Need to evaluate complexity and cost implications
3. Evaluate at placement of CO shift system- Before or after bulk sulfur removal
UOP 5254-08
CO2Absorber
CO2
TreatedGas
ConcentratorColumn
Selexol Process Unit - Capture Ready Example #1: Add Sour CO Shift Upstream
SulfurAbsorber Reflux
Pump
StripperReboilerPackinox
Exchanger
H2SStripper
RefluxAccumulator
AcidGas
ExportWaterFeed
Gas
H2SFlash
MakeupWater
SourCO
Shift
TreatedGas
Low pre-investment Impact of shift on
Absorber can be minimized by adding refrigeration
Lean Solution
Filter
UOP 5254-09
Sulfur AbsorberSulfur Absorber
RegeneratorRegenerator
UOP 5254-10
Pre-investmentPre-investment
Sulfur AbsorberSulfur Absorber
RegeneratorRegenerator
UOP 5254-10
Pre-investmentPre-investment
Sulfur AbsorberSulfur Absorber
RegeneratorRegenerator
UOP 5254-10
Expansion with CO2 Absorber
Expansion with CO2 Absorber
Pre-investmentPre-investment
Sulfur AbsorberSulfur Absorber
RegeneratorRegenerator
UOP 5254-10
Expansion with CO2 Absorber
Expansion with CO2 Absorber
Expansion with Concentrator
Expansion with Concentrator
ConcentratorColumn
Selexol Process Unit - Capture Ready Example #2: Sour Shift in Initial Design
SulfurAbsorber Reflux
Pump
StripperReboilerPackinox
Exchanger
H2SStripper
RefluxAccumulator
AcidGas
ExportWaterFeed
Gas
MakeupWater
SourCO
Shift
Minimizes operational change in downstream power block
CO2Absorber
CO2
TreatedGas
Lean Solution
Filter
TreatedGas
UOP 5254-11
Trim SulfurAbsorber
TreatedGas
CO2Absorber
CO2
Selexol Process Unit - Capture Ready Example #3: Integrated Sour Shift Concept
SulfurAbsorber
RefluxPump
StripperReboiler
PackinoxExchanger
H2SStripper
RefluxAccumulator
AcidGas
ExportWaterFeed
Gas
H2SFlash
MakeupWater
Lean SolutionFilter
SourCO
Shift
MP Steam
TreatedGas
UOP 5254-12
Trim SulfurAbsorber
CO2Absorber
CO2
TreatedGas
Selexol Process Unit - Capture Ready Example #3: Integrated Sour Shift Concept
SulfurAbsorber
RefluxPump
StripperReboiler
PackinoxExchanger
H2SStripper
RefluxAccumulator
AcidGas
ExportWaterFeed
Gas
H2SFlash
MakeupWater
Lean SolutionFilter
SourCO
Shift
MP Steam
Design allows for true “bolt-on” design– Few or no changes required in
sulfur sectionUses commercially proven technologyResults in reduced Capex and Opex in
the Selexol unitResults in very clean CO2 stream
UOP 5254-13
UOP Syngas Purification Complex Optimization
Sulfur Product
Syngas
Up front optimization is an integral part of each Selexol project execution to assure Capex and Opex are minimized
while achieving the project goals
H2Product
SNG Product
CO2Product
Technology Partners
UOP/Ortloff UOP
PSA Tailgas
SRU Tailgas
Acid Gas
FT Liquids
Methanol
UOP 5254-17
Selexol Unit
PolybedTM
PSACO Shift/COS Hydrolysis
SulfurGuardbed
TGCU
SRU
Methanation
FT Reactor
Methanol Unit
Selexol ProcessCommercial Experience
Over 60 operating units– Both Natural Gas and Gasification applications
4 Recent Gasification Applications in Operation– Sarlux – Italy – IGCC Power plus H2– API – Italy – IGCC Power– Coffeyville Resources – USA-NH3/UAN– OptiCanada – Oil Sands Canada – H2 plus fuel
Multiple large units in engineering phase– Residue gasification for H2 production, Oil Sands Canada– Other gasification projects
• SNG, Power, NH3, Coal to Liquids, Methanol
UOP 5254-18
Conclusions
Selexol process – Excellent solution for CO2 capture ready plants Integrates into gasification flow schemes for
all applications - from power to chemicals Bolt-on CO2 provides optimum flexibility
UOP 5254-19