DESULFURIZING A GAS STREAM

摘要

A multi-bed process of removing sulfur oxides and or other combustible sulfur containing compounds from a gas stream (10) including combusting the other compounds when present to sulfur oxide, thereby forming a sulfur oxide enriched stream (19). The stream is contacted with first and second serially connected solid adsorbent beds (22, 25) for adsorbing the sulfur oxides in the form of inorganic sulfates and/or sulfur oxides. The feed stream is then realigned to place the second and a third bed (32) in series with the gas stream while the first bed is placed in a regenerative mode. The regenerative adsorbent bed is contacted with a reducing agent to reduce the adsorbed sulfur compounds to hydrogen sulfide and or sulfur dioxide. The steps are repeated until each of the beds are placed in a first adsorbent mode, a second adsorbent, mode, and a regenerative mode.