Low temperature distillation through hydrophobic membranes
The use of hydrophobic porous membranes makes it possible to maintain liquid-vapor interfaces localized at a membrane surface. Based on that, thermally driven separation processes were obtained through the membrane and thoroughly analyzed both experimentally and theoretically. Two experimental conditions were used: i) the porous membrane is in direct contact with two liquid aqueous phases on both sides and the vapor phase is trapped inside the pores (capillary distillation); ii) on one side of the porous membrane there is a warm aqueous solution, while an additional gaseous gap is maintained on the opposite side of the porous membrane; the vaporizing component diffuses through the entire gas phase and condenses at a cold surface confining the gaseous gap (cold wall distillation). The mathematical model, describing both the separation rate and the energy flux is presented and compared with the experimental results. The influence of the gas membrane thickness is also discussed.
- Research Organization:
- Universita di Bologna, Italy
- OSTI ID:
- 6165877
- Report Number(s):
- CONF-851011-
- Journal Information:
- Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 22:2/3; ISSN SSTED
- Country of Publication:
- United States
- Language:
- English
Similar Records
Vacuum membrane distillation: Experiments and modeling
Temperature polarization coefficients in membrane distillation
Related Subjects
400105* -- Separation Procedures
AQUEOUS SOLUTIONS
BLOOD VESSELS
BODY
CAPILLARIES
CARDIOVASCULAR SYSTEM
DATA
DIFFUSION
DISPERSIONS
DISTILLATION
EFFICIENCY
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
INTERFACES
LIQUIDS
LOW TEMPERATURE
MATHEMATICAL MODELS
MEMBRANES
MIXTURES
NUMERICAL DATA
ORGANS
PHASE STUDIES
SEPARATION PROCESSES
SOLUTIONS
VAPORS