B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 21/20 (2006.01) B01J 21/18 (2006.01)
Patent
CA 2185726
A method is provided for the restoration of catalytic activity in deactivated nitrogen-treated carbon catalysts. Nitrogen-treated carbon catalysts are those carbonaceous chars which have been subjected to nitrogen-containing compounds at temperatures above about 700°C. These nitrogen-containing compounds can be present either as part of the char raw material or as an additive to the char at any point during its manufacture. The method provides for a means to restore catalytic activity which is largely independent of the mechanism by which deactivation of the catalyst sites occurs. In the present invention, the deactivated nitrogen-treated carbonaceous char is heated to temperatures greater than 700°C, followed by cooling in an inert atmosphere. While at temperatures above 700°C, the char can be exposed to gasifying agents such as steam, carbon dioxide, or oxygen.
L'invention a pour objet un procédé destiné à rétablir l'activité catalytique de catalyseurs au carbone traité à l'azote, désactivés. Les catalyseurs au carbone traité à l'azote sont des charbons carbonés ayant été exposés à des composants contenant de l'azote à des températures supérieures à 700 ~C environ. Ces composés contenant de l'azote peuvent être présents soit en tant que partie de la matière première de charbon soit en tant qu'additif incorporé au charbon à tout moment de sa fabrication. Le procédé comprend un moyen de rétablir l'activité catalytique, largement indépendant du mécanisme de désactivation des emplacements du catalyseur. Le charbon carboné traité à l'azote, désactivé, est chauffé à des températures supérieures à 700 ~C, puis refroidi en atmosphère inerte. A des températures supérieures à 700 ~C, le charbon peut être exposé à des agents de gazéification tels que la vapeur, le dioxyde de carbone ou l'oxygène.
Borden Ladner Gervais Llp
Calgon Carbon Corporation
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