ENV-01-10 Employing Liquid Redox as a Tail Gas Cleanup Unit

Description:

Throughout the years, the Claus process has undergone a continuous evolution in attempts to increase the sulfur recovery efficiency of the process. In the 1930’s, a thermal stage was added to the two catalytic stages, which increased the recovery efficiency from 95% to approximately 97%. In the 1970’s, the SCOT process was introduced which added hydrogenation/hydrolysis plus amine separation to treat the tail gas from the Claus process. In 1988, SuperClaus was introduced, which added a selective oxidation reactor to the end of the Claus process, increasing the efficiency to approximately 99%. And just recently, EuroClaus(1) was introduced, which replaced the second Claus reactor in the SuperClaus process with a selective hydrogenation catalyst increasing the efficiency to 99.5%.