Membrane gas transfer can be compromised by water condensation during operation. Experiments reported here show that the feed gas is rapidly saturated with water, whose transport is controlled by resistances in the membrane and the gas phase. This gas then becomes supersaturated because of gas dissolution, which is controlled by transport in the liquid phase. The water in the supersaturated gas is not normally transported back into the liquid, but forms droplets on the gas side of the membrane. While this condensation cannot normally be avoided, module design can facilitate condensate removal.
Bibliographical noteFunding Information:
This work was primarily supported by the United States Department of Defense’s Strategic Environmental Research and Development Program (CU 1124). Other significant support came from the US Airforce Office of Scientific Research (F49620-01-1-0333), the Department of Energy (FG07-02ER63509) and the Petroleum Research Fund (39083-AC9).
- Gas transfer
- Hollow-fiber membranes
- Numerical model