Hitachi Shipbuilding and Engineering Co., Ltd.

Kazuo Maeda

Hideya Inaba

Yasumi Kamino

Kenichi Nagai

Masayoshi Ichiki

Toshio Hama

A plate-shaped denitrating catalyst comprising a metal net, a finely divided porous carrier retained on the metal net with a binder and covering the metal net, and an active component supported on the carrier.

Process for repairing plate-shaped denitrating catalysts

A plate-shaped denitrating catalyst is produced by the steps of preparing a slurry from hydrated titania and a sol selected from the group consisting of silica sol, alumina sol and titania sol, firing the slurry to obtain a porous material, pulverizing the porous material to a powder, causing a metal net to support the powder thereon with a binder to form a plate-like piece, drying or firing the piece to obtain a porous carrier and depositing a catalytically active component on the carrier.

Process for producing plate-shaped denitrating catalyst

A highly active denitrating catalyst is produced by converting the surface layer of steel material to an aluminum alloy, treating the resulting steel material with an aluminum dissolving solution to dissolve out the aluminum and to render the surface layer porous, and immersing the steel material having the porous surface layer in a solution containing a vanadium compound to cause the porous surface layer to support the vanadium compound.

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Osaka, Japan

Kazuo Maeda