Eco-friendly Coke Combustion in FCC

As a preventive solution to the problem of NOx emissions, catalytic combustion has come to the forefront during the last two decades. The focus of major interest here is its application in gas turbines for power generation and for transportation by road, water or air. Any catalyst for catalytic combustion, however, has to face extreme demands above 1000°C in the presence of oxygen and steam, in uninterrupted operation for at least one year also, resistance to impurities or poisons in the fuel and to severe thermal and mechanical shocks. Promising developments in catalytic supports, washcoats and active materials are reviewed briefly. 

Mathematical modelling is proving to be a powerful tool to probe the complexities of catalytic combustion in monolithic honeycomb catalyst geometry, to 

Since material science and catalysis cannot as yet meet the exacting demands in catalytic combustion, elegant systems engineering is being applied to overcome the problems and to develop practical solutions for the time being. Several approaches of this type developed in Japan and the United States and in the European AGATA project are presented briefly. Finally, a survey of recent patents (from 1993) indicates the emerging tendencies in this field. 

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