Abstract: 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° F. and 500° 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.

Abstract: 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 NOx. 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.

Abstract: 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° F. and 500° 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.

Abstract: 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 NOx. 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.

Abstract: A process is described for producing forged ring articles from high strength, high temperature materials such as superalloys and titanium alloys. The material to be forged is conditioned and placed into a condition of low strength and high ductility. This starting material is then back extruded to produce a cup. The cup can be sliced into rings in which can thereafter be final forged to a particular contour.

Abstract: A process for forging hollow elongated articles from superalloys and titanium alloys. The process employs preconditioned material which has low strength and high ductility. The process is performed in a forging press and has an initial step which converts a preform into a intermediate shape by press motion which produces radial outward workpiece flow. Press punch geometry is then changed and the operation continues with radial inward flow about a mandrel.