Resin Wafer-Electrodeionization for Flue Gas Carbon - ARPA-e

15 Pages·2010·1.19 MB·English

Resin Wafer-Electrodeionization
for Flue Gas Carbon Dioxide Capture
DOE Program Announcement Number: DE-FOA-0000065
ARPA-E Award: DE-AR0000024
2010 NETL CO Capture Technology R&D Meeting
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Pittsburgh, PA
September 14, 2010
Lead Recipient: Nalco Company
Project Title: Energy Efficient Capture of CO from Coal Flue Gas
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Nalco Principal Investigator: Jitendra T. Shah
Argonne Principal Investigator: Yupo J. Lin
Presented by Jitendra T. Shah and Wayne M. Carlson
A new strategy for CO capture: CO _RW-EDI
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Strategy:
• Addresses CO absorption & release
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- Resin Wafer-Electrodeionization designed and developed to
capture and release CO (CO _RW-EDI)
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- Kinetics enhanced with carbonic anhydrase enzyme
• Employs electrochemical pH control
- pH shifts capture and release CO in separate cells
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- Water splitting enables in-situ pH control for optimum activity
- Eliminates the need for acids and bases
• Decreases parasitic energy load
- Avoids temperature and/or pressure swings for regeneration
- Avoids the use of steam and vacuum
Project goals will significantly advance CO capture technology
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Project Goals
• Develop Resin Wafer-Electrodeionization technology for CO
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capture
• Target 90% CO capture and released CO with 90% purity
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• Establish a prototype demonstration of a pilot system that
captures CO at an effective rate of 1 tonne/day,
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Technology Readiness Level 6 (TRL-6)
Project benefits for the environment & consumers
• Energy-efficient CO capture to mitigate climate change
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• Minimize the impact on cost of electricity (by as much as 50% to keep
coal-fired power production affordable)
• Easily retrofitted to existing industrial facilities and compatible with
carbon storage technologies
• Make clean CO available for beneficial uses such as algal biofuels,
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renewable plastics, etc.
• Develop advanced manufacturing capabilities in the U.S.
What is RW-EDI?
RW-EDI is based on a progression of water purification
technologies
feed
Cathode Anode
- +
• Ion Exchange (IX)
• Electrodialysis (ED)
product outlet
water waste
• Electrodeionization (EDI)
Resin-Wafer Electrodeionization (RW-EDI)
• Liquid Systems
• Gas/Liquid Systems
Single RW-EDI cell
Scanning electron microscope image
of an ion-exchange resin wafer
Resin wafer held within a gasket
Close-up view of a single RW-EDI cell
Water splitting provides ions that continuously regenerate the ion-
exchange resin and enables electrochemical solution pH control
water
splitting
water
H+ OH-
Cathode splitting Anode
water
splitting H+ OH-
- +
OH-
H+
anion
resin
cation
resin
Resin wafer
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The platform is a unique adaptation of deionization technology
The RW-EDI uses the
electrochemical pH shifts to
capture CO from the flue gas
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and to release the CO .
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Advantages:
(cid:216) Electrochemical pH control
(cid:216) Carbonic anhydrase enzyme
drives kinetics for faster
capture and release of CO
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(cid:216) Energy efficient CO capture
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(cid:216) Minimizes impact on cost of
electricity
Patent pending
Schematic of experimental set-up
Capture resin wafer
(basic pH) BP BP
CEM N
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CO + OH- (cid:224) HCO - Basic pH Acidic pH
2 3
Release resin wafer
H+ H+
(acidic pH) ))
--
HCO3- + H+ (cid:224) CO2 + H2O de (de ( OH- OH- AnoAno Capture
athoatho ureture aseease de (+de (+ Tank
CC ptp el ))
a le CO
aC eR Bicarbonate 2
C R
Basic pH Acidic pH Solution
15% CO
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Release
Tank
BP: Bipolar Membrane
CEM: Cation Exchange Membrane
Lab-scale system with one cell pair
Flue gas & liquid exit
‘Head-on’ view
from capture
Pure CO
2
collection
tank
Waste gas
separation
tank
Exit from release
Power supply
Flue gas & liquid Cathode Anode Carbon-enriched
into capture liquid into
release