Sumitomo Chemical Company, Limited

Renaissance Energy Research Corporation

Takenori Kitaura

Yudai Ota

Takehiro Nakasuji

Hisaaki Miyamoto

Osamu Okada

Masaaki Teramoto

A spiral-wound type gas separation membrane element includes a central tube and a laminate wound around the central tube. Laminate includes at least one structure where a feed-side flow path member, a gas separation membrane, and a permeate-side flow path member are superimposed in this order. Permeate-side flow path member has a thickness of 400 &#x3bc;m to 1300 &#x3bc;m. Gas separation membrane is a membrane where a hydrophilic resin composition layer, a porous layer, and a permeate-side surface layer are superimposed in this order. Permeate-side surface layer faces Permeate-side flow path member and has a Young's modulus of 20 MPa to 400 MPa.

Spiral-wound type gas separation membrane element, gas separation membrane module, and gas separation device

Provided is a method for separating, from a raw gas containing a specific gas, the specific gas using a gas separation membrane module. The gas separation membrane module includes a housing and a gas separation membrane element enclosed in the housing. The gas separation membrane element includes a gas separation membrane including a hydrophilic resin composition layer for selectively allowing for permeation of the specific gas. The method includes the steps of: increasing pressure in an interior of the gas separation membrane module; increasing a temperature in the interior of the gas separation membrane module; and feeding a raw gas to the interior of the gas separation membrane module in that order.

Gas separation method

Provided is a method for separating a specific gas from a raw gas using a gas separation membrane module that includes a gas separation membrane element enclosed in a housing. The element includes a gas separation membrane including a hydrophilic resin composition layer. The method includes: preparing the module; increasing pressure in an interior of the module; increasing a temperature in the interior; and feeding a raw gas to the interior. The layer of the module prepared is adjusted to contain moisture, and a moisture content thereof is an amount that allows an equilibrium relative humidity at a temperature of 23&#xb0; C. of a gas phase portion in the housing to be 10% RH or more. The raw gas feeding step is performed after the preparation step. The pressure increase step and the temperature increase step are performed after the preparation step and before the raw gas feeding step.

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Osaka, Japan

Takenori Kitaura