The Chugoku Electric Power Co., Inc.

Tokyo Metropolitan University

Toshikazu Yoshikawa

Masatake Haruta

Toru Murayama

Keiichiro Morita

Eiji Kiyonaga

Kenji Hikino

Makoto Mino

Kazuhiro Yoshida

Hiroshi Shimada

Misao Nobori

Atsushi Ito

Fumihiro Miyake

Yuichiro Morizane

Hiroyuki Kagawa

There is provided a method for recycling a catalyst that exhibits a high denitration efficiency at a relatively low temperature and does not cause oxidation of SOin a selective catalytic reduction reaction that uses ammonia as a reducing agent. A method for recycling a denitration catalyst includes a step of spraying an aqueous solution with a pH of 7 or more onto a used denitration catalyst while the denitration catalyst is set in a denitration device to remove a surface of the denitration catalyst. The denitration catalyst contains 43 wt % or more of vanadium pentoxide and has a BET specific surface area of 30 m/g or more. The denitration catalyst after recycling is used for denitration at 200&#xb0; C. or lower.

Method for recycling denitration catalyst

There is provided a method for recycling a catalyst that exhibits a high denitration efficiency at a relatively low temperature and does not cause oxidation of SOin a selective catalytic reduction reaction that uses ammonia as a reducing agent. A method for recycling a denitration catalyst includes a step of removing a used denitration catalyst from a denitration device and then coating the used denitration catalyst with a catalyst component. The catalyst component contains 43 wt % or more of vanadium pentoxide and has a BET specific surface area of 30 m/g or more, and the denitration catalyst after recycling is used for denitration at 200&#xb0; C. or lower.

A method for regenerating an NOx removal catalyst, which includes connecting an upstream fixing member () to one end of a member to be ground, and connecting a downstream fixing member () to the other end; connecting a mixing part () for mixing an abrasive with a gas to an upstream portion of the upstream fixing member, and disposing a screen member in the expanded part, and connecting a classification part () and a dust-collecting part () to the downstream fixing member; and transferring the abrasive which has been mixed with the gas from the mixing part to the upstream fixing member, reducing the flow rate of the mixture in the expanded part, subsequently, causing the mixture to pass through the through-hole of the NOx removal catalyst and the downstream fixing member, and then collecting dust by means of the dust-collecting part via the classification part.

Method for regenerating denitrification catalyst

Growing community of inventors

Hiroshima, Japan

Toshikazu Yoshikawa