Sulfur wash removes soot from Claus catalyst bed online

06/11/2001
Saudi Aramco has successfully removed soot and restored normal pressure drop in a Claus catalyst bed with an online sulfur wash technique.During the sulfur wash, the affected catalyst bed is operated at less than the sulfur dew point for a time and then regenerated to remove the accumulated sulfur.This technique, which has been used repeatedly, does not permanently damage catalyst activity. This article presents the experience of Saudi Arabian Oil Co. (Saudi Aramco) with sulfur wash to remove soot from Claus converters in sulfur recover units (SRU).Discussed are the causes of soot formation, methods to minimize it, the sulfur wash concept, sulfur wash procedure, and the results of a succe...
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