Patent ID: 7175821

Claim:
A process for lowering the concentration of pollutants in a gaseous mixture, comprising the steps of: contacting a catalyst with a gaseous mixture containing pollutants under conditions sufficient to lower the concentration of pollutants in the gaseous mixture, by catalytically converting at least a portion of said pollutants to at least one different material, said different material remaining in the gaseous mixture; subsequently passing the gaseous mixture through a fluidizable sorbent bed at a flow rate sufficient to fluidize said fluidizable sorbent, under conditions which are suitable for removing at least a portion of said different material from the gaseous mixture; removing spent sorbent from contact with said gaseous mixture; and, adding fresh sorbent in place of the spent sorbent so removed, wherein removal and replacement of said sorbent occurs without interrupting the flow of said gaseous mixture to said fluidizable sorbent bed.