capture by Sorption-Enhanced Water- Gas Shift (SEWGS ...T +31 88 515 49 49 [email protected] . F +31 88...
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Pre-combustion CO2 capture by Sorption-Enhanced Water- Gas Shift (SEWGS): Modelling from molecules to process cycles J. Boon (ECN) P.D. Cobden (ECN) H.A.J. van Dijk (ECN) M. van Sint Annaland (TU Eindhoven) June 2013 ECN-L--13-032
Transcript of capture by Sorption-Enhanced Water- Gas Shift (SEWGS ...T +31 88 515 49 49 [email protected] . F +31 88...
Pre-combustion CO2 capture by Sorption-Enhanced Water-Gas Shift (SEWGS): Modelling from molecules to process cycles J. Boon (ECN) P.D. Cobden (ECN) H.A.J. van Dijk (ECN) M. van Sint Annaland (TU Eindhoven)
June 2013 ECN-L--13-032
www.ecn.nl
Pre-combustion CO2 capture by
Sorption-Enhanced Water-Gas Shift (SEWGS):
Modelling from molecules to process cycles
Jurriaan Boon, P.D. Cobden, H.A.J. van Dijk, M. van Sint Annaland
7th Trondheim CCS Conference (TCCS-7) 4-6 June 2013 - Trondheim, Norway
Pre-combustion CO2 capture
Gazzani et al. Fuel 105 (2013) 206-219
Pre-combustion CO2 capture
WGS and CO2-H2 separation
Gazzani et al. Fuel 105 (2013) 206-219
Pre-combustion CO2 capture
WGS and CO2-H2 separation
Manzolini et al. Fuel 105 (2013) 220-227
Selexol
CO2 avoided % 86.5
SPECCA MJLHV / kgCO2 3.71
Cost € / tCO2 36.7
Pre-combustion CO2 capture
WGS and CO2-H2 separation
Gazzani et al. Fuel 105 (2013) 206-219
Pre-combustion CO2 capture
WGS and CO2-H2 separation
Gazzani et al. Fuel 105 (2013) 206-219
Pre-combustion CO2 capture
WGS and CO2-H2 separation
Manzolini et al. Fuel 105 (2013) 220-227
Selexol SEWGS
CO2 avoided % 86.5 93-97
SPECCA MJLHV / kgCO2 3.71 2.5-2.7
Cost € / tCO2 36.7 31-33
SEWGS
‘Bench’ scale
6 m
K-promoted hydrotalcite ‘Alkasorb’
SEWGS process steps
Loading and regeneration
AD
SOR
PTI
ON
SEWGS process steps
Loading and regeneration
AD
SOR
PTI
ON
RIN
SE
SEWGS process steps
Loading and regeneration
AD
SOR
PTI
ON
RIN
SE
PU
RG
E
depressurise repressurise
SEWGS process steps
Loading and regeneration
AD
SOR
PTI
ON
RIN
SE
PU
RG
E
Multicolumn SEWGS
• Cyclic process, repeating – Adsorption
– Rinse
– Depressurisation
– Purge
– Repressurisation
depressurise repressurise
SEWGS process steps
Modelling fundamentals
AD
SOR
PTI
ON
RIN
SE
PU
RG
E
SEWGS
Experiments and modelling
Breakthrough experiments
Cyclic experiments
SEWGS
Experiments and modelling
Breakthrough experiments
Cyclic experiments
Adsorption isotherms
COLUMN
0 m
0.5 m
1 m
2 m
VALVE BOX
& REDUCER
EXHAUST
MASS
SPECTROMETER
FILTER
EXHAUST
SEWGS
Breakthrough experiments
Sample system
feed
breakthrough
Thermocouple
SEWGS
Measured & fitted isotherms
0 10 20 300
0.5
1
1.5
2
pCO
2
[bar]
qCO
2
[mol kg-1
]
CO2 only
0 5 10 15 20 25 300
0.5
1
1.5
2
pi [bar]
qi [mol kg
-1]
p(H2O) = 20 bar
p(CO2) = 5 bar
p(CO2) = 20 bar
CO2 and H
2O
0 10 20 300
0.5
1
1.5
2
pH
2O
[bar]
qH
2O
[mol kg-1
]
H2O only
SEWGS
Reactor model
Breakthrough experiments
Cyclic experiments
Adsorption isotherm
Reactor model
Reactor model
CO2 and H2O adsorption
• New isotherms – CO2: surface and micropores
– H2O: surface and micropores
– Interaction
• Intraparticle model – Accumulation in the gas phase
– Accumulation in the solid phase 𝜕 𝑐
𝜕𝑡= 𝑘𝐿𝐷𝐹 𝑐𝑖 − 𝑐
𝑘𝐿𝐷𝐹 =15
𝑅2
𝐷𝑒
𝜖𝑝 + 1 − 𝜖𝑝 𝜌𝑝𝜕𝑞𝜕𝑐
Reactor model
CO2 and H2O adsorption
• New isotherms, linear driving force
• Breakthrough curves match
0%
20%
40%
0 500 1000
Mole fraction [-]
Time [s]
Ar
H2O
CO2
41% H2O
5% CO2
0%
20%
40%
0 500
Mole fraction [-]
Time [s]
Ar
H2O
CO2
26% H2O
14% CO2
SEWGS
Cycle design
Breakthrough experiments
Cyclic experiments
Adsorption isotherm
Cyclic simulations
Reactor model
Cycle design
SEWGS
Cycle optimisation
• Fix the number of columns, cycle
• Vary total cycle time, rinse steam flow, purge steam flow
• Calculate carbon capture ratio, CO2 purity
SEWGS
Conclusions & Outlook
• SEWGS – WGS with H2-CO2 separation
– New isotherm and particle model for CO2-H2O adsorption
– Impact on cycle performance to be assessed
• Alkasorb Alkasorb+
• Application to other processes – H2 production for ammonia
– Syngas conditioning
– Iron and steel making industries
– Acid gas processing
• Ready for scale-up and demonstration!
Thank you for your attention
ECN
Westerduinweg 3 P.O. Box 1
1755 LE Petten 1755 ZG Petten
The Netherlands The Netherlands
T +31 88 515 49 49 [email protected]
F +31 88 515 44 80 www.ecn.nl
ECN Sustainable Process Technology Paul Cobden Eric van Dijk Coen Hoogland Daan Jansen TU/e Chemical Process Intensification Martin van Sint Annaland
This work has been performed as part of the Dutch national R&D programme for CO2 capture, transport and storage CATO-2.
ECN-L--13-032 3
ECN Westerduinweg 3 P.O. Box 1 1755 LE Petten 1755 LG Petten The Netherlands The Netherlands T +31 88 515 4949 F +31 88 515 8338 info@ ecn.nl www.ecn.nl
