Membrane separation

Cavitation phenomenon of centrifugal liquid oxygen pump

I. The basic principle of membrane separation and oxygen generation the study of gas's mass transfer process in membrane has a history of more than 100 years. People have conducted a lot of studies on single gas's transmission in polymer and membrane, thus, it has gained better development in theory. However, the application of membrane in practice has been a matter of recent decades, and a more prominent example is the separation of isotopes from nuclear weapons. It was not until the late 1970s s that the permeability and selectivity of gas in polymer membrane had developed to be of industrial economic value that membrane was widely applied like today. Generally speaking, the membrane can permeate all the gas, but the extent of permeation is different. Gas penetrates through the hollow polymer membrane, which is a complex process. Its penetration mechanism is generally that gas molecules are first absorbed on the surface of the membrane to dissolve, and then spread in the membrane,...