Sumitomo Electric Industries, Limited

Toru Adachi

Atsushi Inoue

Masaaki Hirano

Shinji Ishikawa

Toshiaki Kakii

Masashi Onishi

Yuichi Ohga

Hiromasa Tawarayama

Osamu Kasuu

Taiichiro Yamashita

Shuichiro Kato

The method for producing silicon metal and porous carbon from rice hulls is provided. The method comprises a first step Sof producing a rice hull charcoal Mcontaining SiOand C by heat treatment of rice hulls M; a second step Sof exposing the rice hull charcoal Mto at least any one of heated first inert gas Gor reducing gas to produce SiC; a third step Sof exposing SiC to a heating atmosphere containing Clgas to produce SiCland porous carbon P; a fourth step Sof reacting SiCland Zn to produce silicon metal Pand ZnCl; and a fifth step Sof electrolyzing ZnClto produce Zn and Clgas. The Clgas in the fifth step Sis used in the third step S, and Zn in the fifth step Sis used in the fourth step S

Method for producing silicon metal and porous carbon

An object of the present invention is to provide a hydrogen separation material resistant to thermal shock, excellent in hydrogen separation characteristic and applicable to a hydrogen separation membrane, etc. and a manufacturing method thereof, as well as a hydrogen separation module and a hydrogen production apparatus comprising the same. In the hydrogen separation material, a silica glass membrane is formed on a porous support having a linear expansion coefficient of 2&#xd7;10/K or less. The manufacturing method for the hydrogen separation material includes a porous support forming step of forming a porous support comprising porous silica glass and a silica glass membrane forming step of forming a silica glass membrane on the surface of the porous silica glass. The hydrogen separation module comprises the hydrogen separation material and a steam reforming catalyst. The hydrogen production apparatus comprises the hydrogen separation module.

Silica-based hydrogen separation material and manufacturing method therefor, as well as hydrogen separation module and hydrogen production apparatus having the same

A core rod is inserted into a cladding pipe, moisture in a space between the core rod and the cladding pipe is removed, and an optical fiber is drawn while the space is connected to a dry-gas atmosphere and/or being decompressed and while the core rod and the cladding pipe are being unified with each other. Alternatively, the core rod is inserted into the cladding pipe, and an optical fiber is drawn from one end while moisture on the surface of the core rod and the internal surface of the cladding pipe is being removed. Accordingly, a high quality optical fiber is manufactured with good productivity.

Optical fiber and manufacturing method thereof

Growing community of inventors

Yokohama, Japan

Toru Adachi