Denso Corporation

National Institute of Advanced Industrial Science and Technology

Takashi Makino

Mitsuhiro Kanakubo

Masao Iwaya

Yoshiaki Nishijima

Yuuki Tarusawa

Masatoshi Maruyama

Keiji Noda

Hiroshi Nanjo

Yo Yamato

Tatsuya Umeki

Provide are an ionic liquid composition for a carbon dioxide separation membrane, a carbon dioxide separation membrane retaining the composition in voids, and a carbon dioxide concentration apparatus provided with the carbon dioxide separation membrane that can be used to separate carbon dioxide from high partial pressure to low partial pressure. The permeability of COand COselectivity ratio of the carbon dioxide separation membrane can be improved, and carbon dioxide from high partial pressure to a low partial pressure of 1 kPa or lower can be selectively separated and recycled by using an ionic liquid composition prepared by combining: an ionic liquid (I) that is an aminium having one or more primary or secondary amino groups and an ethylenediamine or propylenediamine backbone in the cation; and an ionic liquid (II) in which the cation has no primary or secondary amino group and the anion is an oxoacid anion.

Ionic liquid composition for carbon dioxide separation membrane, carbon dioxide separation membrane holding said composition, and carbon dioxide concentration apparatus provided with said carbon dioxide separation membrane

A gas separation and recovery apparatus that separates and recovers nitrogen oxides from a gas mixture includes: a liquid storing portion that stores a liquid, the liquid absorbing the nitrogen oxides; a gas-liquid contacting portion in which the liquid and the gas mixture contact with each other; and a liquid recovering portion that recovers the liquid after the liquid contacts the gas mixture. The liquid is an ionic liquid that chemically absorbs the nitrogen oxides.

Gas separation and recovery apparatus and gas separation and recovery method

Growing community of inventors

Sendai, Japan

Takashi Makino