Bubble-free aeration using membranes: mass transfer analysis

✍ Scribed by Pierre Côté; Jean-Luc Bersillon; Alain Huyard

• Book ID: 117511497
• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 902 KB
• Volume: 47
• Category: Article
• ISSN: 0376-7388
• DOI: 10.1016/s0376-7388(00)80862-5

✦ Synopsis

The mass transfer characteristics of silicone rubber hollow fibres for the oxygenation of water were studied. A resistance-in-series model with two resistances, the membrane and the liquid film resistances, was used to describe the oxygen transfer process. Data from the literature indicate that the liquid film resistance is normally larger than the membrane resistance when a polymer (such as silicone rubber) with a high oxygen permeability is used. A new module configuration, designed to decrease the liquid film resistance, was evaluated experimentally and compared with the conventional inside flow configuration. The module was very efficient in reducing the liquid film resistance. Experiments were also conducted to study the effect of oxygen partial pressure, the use of air or oxygen, the gas flow regime and the presence of surfactant on the efficiency of oxygen transfer.