Dense bed afterburning control in a catalytic regeneration zone

Details Dense bed afterburning control in a catalytic regeneration zone Dense bed afterburning control in a catalytic regeneration zone

B - Operations, Transporting

01

J

252/1.E

B01J 21/20 (2006.01) B01J 8/24 (2006.01) B01J 37/14 (2006.01) C10G 11/18 (2006.01)

Patent

CA 1156640

ABSTRACT OF THE DISCLOSURE A process for regenerating spent catalyst containing coke in a dense phase regeneration zone wherein spent catalyst is maintained as a dense bed. Coke is oxidized in the dense bed to carbon monoxide, and carbon monoxide is further oxidized in the dense bed. Flow of fresh regeneration gas containing oxygen is adjusted to maintain afterburning of carbon monoxide to carbon dioxide in the dense bed based on a temperature in the regenerator, an average temperature in the regenerator, a temperature difference in the regenerator, or the quantity of oxygen in spent regeneration gas. Almost complete afterburning of carbon monoxide in the dense bed of the regenerator practically eliminates an air pollution problem, and also provides hotter regenerated catalyst.

172029

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