Kobe Steel, Ltd.

Noboru Nakao

Akitoshi Fujisawa

Takeshi Yamashita

Koji Yamamoto

Masahiro Motoyuki

Shinichi Miura

Keita Yura

For recovering hydrogen with a high recovery from a reformed gas and contributing to downsizing and cost reduction of facilities, a high-purity hydrogen E is obtained by reforming a reformable raw material A through a reforming unitto yield a hydrogen-rich reformed gas B, compressing the hydrogen-rich reformed gas B with a compressor, allowing the compressed gas to pass through a PSA unitto remove unnecessary gases other than carbon monoxide by adsorption, and allowing the resulting gas to pass through a carbon monoxide removerpacked with a carbon monoxide adsorbent supporting a copper halide to remove carbon monoxide by adsorption.

Method of producing high-purity hydrogen

A PSA apparatus for high-purity hydrogen gas production is provided which can recover high purity hydrogen gas at a high recovery rate from a reformed gas (hydrogen-containing gas) produced by a reforming process, for example an autothermal reforming process, and containing, as impurity components, at least CO, CO2, N2 and/or Ar, and can contribute to reducing the equipment size, hence reducing the equipment cost. The PSA apparatus for high-purity hydrogen gas B production by removing CO, CO2 and N2 by adsorption from a hydrogen containing gas A, comprises an adsorption tower; and an adsorbent bedin the adsorption tower, wherein, on the occasion of regeneration of the adsorbent bed, a purge gas C is passed through in the direction opposite to the direction of passage of the hydrogen-containing gas A.

PSA apparatus for producing high-purity hydrogen gas

A method for concentrating 2,6-dimethylnaphthalene in a dimethylnaphthalene isomer mixture includes supplying the dimethylnaphthalene isomer mixture to an adsorption column packed with Y-type zeolite. In this instance, by setting the value derived from the expression (u /&egr;)d at 14 (m s kg ) or more, the concentration ratio of 2,6-dimethylnaphthalene to 2,7-dimethylnaphthalene can be 2.0 or more. u here represents the linear velocity (m/s) of the dimethylnaphthalene isomer mixture supplied to an adsorption column, &egr; represents the packing density (kg/m ) of Y-type zeolite, and d represents the grain size (m) of the Y-type zeolite.

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Kobe, Japan

Noboru Nakao