Patent ID: 8124017
Filing Date: 2012-02-28
Classification: B01D,Y10S

Abstract:
1. A system for regenerative selective catalytic reduction, comprising: a) a catalyst chamber having an inlet, an outlet and defining a flow path between the inlet and the outlet, the catalyst chamber containing a catalyst for reducing NO b) a reactant injector in fluid communication with the system for introducing a reactant into the gas stream upstream from the catalyst chamber as the gas stream passes through the system; c) a valve manifold in fluid communication with the inlet and the outlet of the catalyst chamber, wherein the valve manifold is adapted to direct a substantially continuous gas stream through the catalyst chamber from the inlet to the outlet during each cycle of system operation along the same flow direction; d) a first heat exchanger in fluid communication with the valve manifold, wherein the first heat exchanger includes a heater and a vessel including a thermal mass adapted to permit a gas stream to pass therethrough, the first heat exchanger adapted to exchange energy with a gas stream passing therethrough; and e) a second heat exchanger in fluid communication with the valve manifold, wherein the second heat exchanger includes a heater and a vessel including a thermal mass adapted to permit a gas stream to pass therethrough, the second heat exchanger adapted to exchange energy with a gas stream passing therethrough; f) wherein the valve manifold is further adapted to: