Sumitomo Chemical Company, Limited

Renaissance Energy Research Corporation

Yudai Ota

Osamu Okada

Yoshihito Okubo

Takenori Kitaura

Nobuaki Hanai

Yasato Kiyohara

Takehiro Nakasuji

Peng Yan

Hisaaki Miyamoto

Atsushi Yamamoto

Masaaki Teramoto

Shohei Kasahara

Atsushi Shudo

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 are a COgas separation membrane, a method for manufacturing the same, and a carbon dioxide gas separation membrane module including the same, the COgas separation membrane including: a first layer (A) containing at least one alkali metal compound selected from the group consisting of an alkali metal carbonate, an alkali metal bicarbonate and an alkali metal hydroxide, and a first resin in which a polymer having a carboxyl group has been crosslinked; a second layer (B) containing at least one of the alkali metal compounds, and a second resin having a structural unit derived from a vinyl ester of a fatty acid; and a hydrophobic porous membrane (C).

Carbon dioxide gas separation membrane, method for manufacturing same, and carbon dioxide gas separation membrane module

The present invention provides a composition for a COgas separation membrane containing: at least one compound selected from the group consisting of an alkali metal carbonate, an alkali metal bicarbonate, and an alkali metal hydroxide; a crosslinked polymer in which a polymer having a carboxyl group has been crosslinked; and a non-crosslinked polymer obtained by polymerization of one or more monomers selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, and a derivative thereof.

Composition for COgas separation membrane, COgas separation membrane and method for producing same, and COgas separation membrane module

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.

A spiral-wound acid gas separation membrane element () includes a wound body which includes a laminate and a perforated core (), the laminate being wound around the perforated core tube () and including: a separation membrane (), a feed-side channel component (), and an element constituent layer (e.g., permeate-side channel component ()). The separation membrane () is provided with a sealing section () present at both widthwise ends of the separation membrane (). The sealing section () is sealed with an adhesive. This makes it possible not only to separate acid gas from mixed gas more efficiently as compared to a conventional spiral-wound acid gas separation membrane element but also to save energy.

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Osaka, Japan

Yudai Ota