New technique for determining the parameters of gas permeation through solids
The solution of Fick's equation for gas permeation through solid flat membranes yields a throughput rate equation with two unknown parameters, diffusivity and solubility. The common methods used to evaluate these parameters rely on knowing the equilibrium throughout rate. This equilibrium rate is in some cases rapidly established (on the order of seconds), in other cases slowly established (order of months). Thus, permeation measurements may require equipment usage over a long time period, precluding its use for other experience. A mathematical technique for predicting the permeation parameters using the unequilibrated portion of the permeation throughout curve has been developed which overcomes this difficulty. The method developed (termed stabilized search) was tested with data simulated using a known amount of error. The predicted parameters were as accurate as the data, but the values were generated in only 20 to 40% of the time required for other methods.
- Research Organization:
- General Electric Co., St. Petersburg, FL (USA). Neutron Devices Dept.
- DOE Contract Number:
- AC04-76DP00656
- OSTI ID:
- 5486771
- Report Number(s):
- GEPP-OP-474a; CONF-800538-4
- Resource Relation:
- Conference: ACS meeting-in-miniature, Tampa, FL, USA, 8 May 1980
- Country of Publication:
- United States
- Language:
- English
Similar Records
Determination of diffusion rate parameters in unequilibrated systems
Oxygen permeation through thin mixed-conducting solid oxide membranes