Configurations and methods for effluent gas treatment

摘要

Methods and configurations are drawn to a plant in which an effluent gas (102) comprising oxygen and sulfur dioxide is catalytically reacted with hydrogen sulfiden (148) and hydrogen and/or carbon monoxide (114) to form a treated gas that is substantially oxygen free and in which sulfur dioxide is converted to hydrogen sulfide. In most preferred aspects, the hydrogen sulfide is provided to the process via a recycle loop (134B).