Extraction of Carbon Dioxide from Seawater by an Electrochemical Acidification Cell. Part 2 - Laboratory Scaling Studies
Abstract
An electrochemical acidification cell has been developed to extract large quantities of carbon dioxide fast and efficiently from seawater. Verification and validation of the electrochemical cell as a function of increased operational time and flow rate using Key West seawater is reported. The electrolytic regeneration of cation exchange resin allowed simultaneous and continuous ion exchange and regeneration to occur within the cell along with control of the seawater pH. At pHs of less than 6.0, carbon dioxide in the seawater was readily removed by vacuum degassing. At higher seawater flow rates, the flow rate to current ratio for a given pH was significantly improved. Prolonged operation of the cell caused the electrical resistance within the cell to increase by 34% signifying scaling on the cathode. These results are significant to the future design of this technology as it is scaled and transitioned to a marine environment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 11, 2011
- Accession Number
- ADA544072
Entities
People
- Dennis R. Hardy
- Felice Dimascio
- Frederic W. Williams
- Heather Willauer
- M. K. Lewis
Organizations
- United States Naval Research Laboratory