Back to Search
Start Over
Discussion on Water Condensation in Membrane Pores during CO 2 Absorption at High Temperature.
- Source :
- Membranes; Dec2020, Vol. 10 Issue 12, p407, 1p
- Publication Year :
- 2020
-
Abstract
- Water condensation is a possible cause of membrane wetting in the operation of membrane contactors, especially under high-temperature conditions. In this study, water condensation in pores of polytetrafluoroethylene (PTFE) hollow fiber membranes was investigated during high-pressure CO<subscript>2</subscript> absorption around 70 °C. It was found that the liquid accumulation rate in the treated gas knock-out drum was constant during continuous operation for 24 h when all experimental conditions were fixed, indicating a stable degree of membrane wetting. However, as the operating parameters were changed, the equilibrium vapor pressure of water within membrane pores could change, which may result in a condensation-conducive environment. Water condensation in membrane pores was detected and proven indirectly through the increase in liquid accumulation rate in the treated gas knock-out drum. The Hagen–Poiseuille equation was used to correlate the liquid accumulation rate with the degree of membrane wetting. The degree of membrane wetting increased significantly from 1.8 × 10<superscript>−15</superscript> m<superscript>3</superscript> to 3.9 × 10<superscript>−15</superscript> m<superscript>3</superscript> when the feed gas flow rate was reduced from 1.45 kg/h to 0.40 kg/h in this study due to water condensation in membrane pores. The results of this study provide insights into potential operational limitations of membrane contactor for CO<subscript>2</subscript> absorption under high-temperature conditions. [ABSTRACT FROM AUTHOR]
- Subjects :
- CARBON dioxide
HIGH temperatures
HOLLOW fibers
CONDENSATION
VAPOR pressure
ABSORPTION
Subjects
Details
- Language :
- English
- ISSN :
- 20770375
- Volume :
- 10
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Membranes
- Publication Type :
- Academic Journal
- Accession number :
- 147814168
- Full Text :
- https://doi.org/10.3390/membranes10120407