Process and apparatus to reduce no _emissions from a fluid...

Details Process and apparatus to reduce no _emissions from a fluid... Process and apparatus to reduce no _emissions from a fluid...

B - Operations, Transporting

01

J

196/111, 23/353,

B01J 38/34 (2006.01) C10G 11/05 (2006.01) C10G 11/18 (2006.01)

Patent

CA 1296700

F-3986 PROCESS AND APPARATUS TO REDUCE NOx EMISSIONS FROM A FLUID CATALYTIC CRACKING UNIT ABSTRACT OF THE DISCLOSURE A multistage process for reducing NOx in flue gas from fluid catalytic cracking catalyst regeneration. Flue gas is preferably removed after each stage. NOx formed in each regeneration stage is converted to N2 prior to discharge from a stage by operating at least the downstream ends of each regeneration stage at oxygen-lean conditions. Staged regeneration can be achieved by passing spent catalyst through a transport reactor in plug type flow and sequentially contacting the catalyst with a plurality of oxygen-containing streams.

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