Oxygen permeability of teflon–PFA tubing

✍ Scribed by F. W. Giacobbe

• Book ID: 102737266
• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 702 KB
• Volume: 39
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1990.070390508

✦ Synopsis

The permeability coefficient for oxygen diffusing through a sample of Teflon-PFA tubing was determined experimentally. The source of the diffusing oxygen was ambient temperature air surrounding a coiled length of the PFA tubing. High pressure nitrogen was directed through the center of the PFA tubing. Oxygen permeating from the low pressure ambient air source, through the PFA tubing, and into the flowing high pressure nitrogen was observed in the effluent gases as they passed through a trace oxygen analyzer. By this means, oxygen concentrations in the effluent nitrogen were determined as a function of varying nitrogen flow rates, at nitrogen gas pressures of 4.4 and 7.8 atm (absolute), within the tubing bore. All measurements were also carried out at ambient temperatures of 21 1°C. In addition, a theoretically related graphical method of evaluating the experimental data was developed and subsequently employed t o actually determine the oxygen permeability coefficient for this system.