| 摘要 |
Oxygen, or other gas, of moderate purity is produced in a fiber membrane module. A diluent gas, such as air, is introduced into the module, on the shell side of the fibers, so as to mix with oxygen which has permeated through the fibers. The diluent gas not only reduces the concentration of oxygen in the product stream, to make oxygen of moderate purity, but also reduces the partial pressure of oxygen on the shell side of the fibers, thus enhancing the permeation of oxygen through the fibers. The invention can therefore enhance the productivity of the module, and/or reduce the energy required to operate the module.
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