Abb Lummus Global Inc.

Steven M Hopkins

Erwin M J Platvoet

Vinod Kumar Arora

Mohamed B Tolba

John Paul Fell, Jr

John Paul Fell

A system and method for the selective catalytic reduction of nitrogen oxide in a furnace exhaust includes cooling the furnace exhaust in a first heat recovery section to a temperature between 400&deg; F. and 500&deg; F., introducing a reducing agent into the exhaust gas and reacting the nitrogen oxide in the exhaust gas with the reducing agent in the presence of an SCR catalyst in a reactor positioned in the furnace stack. The treated gas emerging from the reactor can be further cooled in a second heat recovery section. The system and process is particularly suitable for use in conjunction with furnaces for thermally cracking hydrocarbon feedstock to produce olefin. The feedstock is preferably preheated in the heat recovery sections prior to introduction into the furnace.

System and method for the selective catalytic reduction of nitrogen oxide in a gas stream

A radial flow gas phase reactor for the selective catalytic reduction of nitrogen oxide in a gas stream includes a shell enclosing an interior space in which is located at least one catalyst bed containing a catalyst for the selective conversion of NO . A deflector directs the flow of gas radially through the bed. An injector upstream of the catalyst introduces a reducing agent such as ammonia into the inlet gas stream. The catalyst bed can include particulate, monolith, or microengineered catalyst.

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Jersey City, NJ, United States of America

Steven M Hopkins