The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2020
Filed:
Mar. 07, 2017
The Chugoku Electric Power Co., Inc., Hiroshima, JP;
Tokyo Metropolitan University, Tokyo, JP;
Eiji Kiyonaga, Hiroshima, JP;
Kenji Hikino, Hiroshima, JP;
Keiichiro Morita, Hiroshima, JP;
Toshikazu Yoshikawa, Hiroshima, JP;
Masatake Haruta, Tokyo, JP;
Toru Murayama, Tokyo, JP;
Makoto Mino, Tokyo, JP;
THE CHUGOKU ELECTRIC POWER CO., INC., Hiroshima, JP;
TOKYO METROPOLITAN UNIVERSITY, Tokyo, JP;
Abstract
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° C. or lower.