Method for separating gas

Abstract

Abstract PURPOSE:To markedly increase the amount of transmitted gas without changing the composition of the transmitted gas too much, by a method wherein a part of non-transmitted gas is passed through and introduced into the surface in a transmitted gas side of a permselective membrane. CONSTITUTION:In concentrating and separating the specific component in stock gas, stock gas is supplied to the single side of a permselective membrane and transmitted gas is exhausted from the other side of the permselective membrane under pressure lower than the supply pressure of the stock gas. At this time, a part of the stock gas is introduced into the transmitted gas side so as to pass through at least the partial region of the membrane surface in the transmitted gas side. By this method, the pressure ratio of the specific gaseous components contacted with both surfaces of the permselective membrane can be reduced and the composition of the specific component transmitted through the membrane can be increased. The lowering in the concn. of the concentrated component is extremely small. It is effective to contact the introduced stock gas with the membrane surface in then transmitted side over the entire region thereof.

Inventors

• 👤 Kazumi Iwata
• 👤 岩田　和美
• 👤 Koki Tamura
• 👤 弘毅 田村

Bibliographic Details