Ube Industries, Inc.

Ube Corporation

Nobuhiko Fukuda

Tomohide Nakamura

Nozomu Tanihara

Yutaka Kanetsuki

Manabu Hayashi

A gas separation system includes: a first gas separation membrane unit; a second gas separation membrane unit; a material gas feed line connected to a gas inlet port of the unit; a first compressor interposed to the line; a first connection line connecting a permeated gas discharge port of the unit and a gas inlet port of the unit; and a second connection line connecting a non-permeated gas discharge port of the unit and the line. The unit and unit each have a gas separation selectivity of 30 or greater. The CHrecovery rate is 98% or higher. The COcontent in non-permeated gas of the unit is 5 mol % or less. The flow rate of gas fed to the unit is 60% or less of the flow rate of material gas fed to the unit.

Gas separation system

A process for producing nitrogen-rich air by feeding high temperature air at 150&#xb0; C. or more to an air separation membrane module is described. After being placed at 175&#xb0; C. for two hours, the air separation module exhibits a shape-retention ratio of 95% or more in one embodiment. The nitrogen-rich air can be fed to a fuel tank for an aircraft, for example.

Gas separation membrane module and method for gas separation

In a gas separation system, a retentate gas discharge port of a first unit Uand a gas inlet port of a second unit Uare connected by a retentate gas discharge line. A permeate gas discharge port of Uand a gas inlet port of a third unit Uare connected by a permeate gas discharge line. A feed gas mixture supply line is connected to a gas inlet port of U. A permeate gas discharge port of Uand the feed gas mixture supply line are connected by a permeate gas return line. A retentate gas discharge port of Uand the feed gas mixture supply line are connected by a retentate gas return line. At least in operation, the gas permeability of Uis higher than that of U, and the gas selectivity of Uis higher than that of U

Gas separation system and enriched gas production method

A gas separation system includes: first, second, and third gas separation membrane units. A first retentate gas line connects a retentate gas discharge port of the first unit and gas inlet port of the second unit. A first permeate gas line connects a permeate gas discharge port of the first unit and gas inlet port of the third unit. A feed gas mixture supply line is connected to a gas inlet port of the first unit, and provided with first compression elements. The first permeate gas line is provided with second compression elements. The permeate gas discharge port of the second unit is connected by a second permeate gas line to the suction side of the first compression elements in the feed gas mixture supply line. A retentate gas discharge port of the third unit is connected by a third retentate gas line to the first retentate gas line.

A gas separation membrane module, comprising: a hollow fiber element having a hollow fiber bundle consisting of a number of hollow fiber membranes and a tube sheet provided at an end of the hollow fiber bundle for binding the hollow fiber membranes; a vessel having an opening through which the hollow fiber element is inserted or removed; a lid member having a gas outlet formed therein and attached to cover the opening of the vessel; and a perforated plate having a plurality of through holes for forming gas channels formed therein, the perforated plate being mounted between the tube sheet and the lid member, the gas separation membrane module performing gas separation by supplying mixed gas to the hollow fiber membranes.

Growing community of inventors

Ube, Japan

Nobuhiko Fukuda