Process for decoking catalysts

Details Process for decoking catalysts Process for decoking catalysts

B - Operations, Transporting

01

J

B01J 23/90 (2006.01) B01D 53/047 (2006.01) C10G 11/00 (2006.01) C10G 11/18 (2006.01)

Patent

CA 2155389

Coke deposits are removed from particulates by combustion in a regenerator by a process in which air is initially used as the oxidant. The combustion gas is subjected to a separation process to remove nitrogen therefrom, and the remaining carbon dioxide-enriched gas stream is recycled to the regenerator together whilesubstantially pure oxygen is introduced into the regenerator. As the level of carbon dioxide in the system increases, the amount of air being introduced into the regenerator is gradually reduced and, in compensation, the amount of oxygen flowing to the regenerator is gradually increased. Eventually, part or all of the air is replaced by oxygen and carbon dioxide recycle gas, and the level of oxygen and carbon dioxide are regulated to maintain the desired temperature in the regenerator.

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