University Public Corporation Osaka

Figaro Engineering Inc.

New Cosmos Electric Co., Ltd.

Tatsuya Tanihira

Kenichi Yoshioka

Masato Takeuchi

Junpei Furuno

Masakazu Sai

Hirokazu Mitsuhashi

Kenta Fukui

Takafumi Taniguchi

Siloxane compounds are removed from the atmospheres by silica supporting an organic sulfonic acid compound. The silica with the organic sulfonic acid compound has a specific surface area down to 500 m/g and up to 750 m/g and a pore volume down to 0.8 m/g and up to 1.2 m/g, both measured by nitrogen gas adsorption method and has a pore diameter down to 4 nm and up to 8 nm, at the peak of differential pore volume measured by nitrogen gas adsorption method. The durability of gas sensing element against siloxanes is improved.

Gas detection device and gas detection method

The filter of a gas sensor comprises an inorganic porous support supporting both an organic sulfonic acid compound including sulfo group (&#x2014;SO3H) and a Lewis acid having at least a metal element of transitional metal elements, Al element, Ga element, In element, Ge element, and Sn element. The Lewis acid loaded in the inorganic porous support adsorbs low concentration siloxanes. The organic sulfonic acid compound including sulfo group polymerizes adsorbed siloxanes in the filter so as not to desorb from the filter.

Gas sensor and method for producing same

Growing community of inventors

Minoo, Japan

Tatsuya Tanihira