Effects of pressure on the recovery of CO2 by phase transition from a seawater system by means of multilayer gas permeable membranes.
Using seawater doped with sodium bicarbonate and Celgard 2400 gas permeable membranes, bicarbonate ion disproportionates to carbon dioxide and carbonate when gaseous carbon dioxide is first removed from the seawater solution by diffusion through gas permeable membranes at elevated water pressures. The permeability of CO(2) by phase transition from bicarbonate solutions at pressures above 100 psi is only possible due to the use of multiple gas permeable membrane layers. The multiple layers minimize water permeability at pressures below and above the Young-Laplace bubble point of single membrane layers, however the gas permeability efficiency and rate are greatly decreased.
Willauer
Heather D
HD
Naval Research Laboratory, Chemistry Division, Code 6180, 4555 Overlook Avenue, SW, Washington, DC 20375, USA. Heather.Willauer@nrl.navy.mil
Hardy
Dennis R
DR
Lewis
M Kathleen
MK
Ndubizu
Ejiogu C
EC
Williams
Frederick W
FW