Activated carbon passes tests for acid-gas cleanup

Lewis G. Harruff, Stephen J. BushkuhlSaudi Arabian Oil Co.Dhahran, Saudi Arabia Use of activated carbon to remove hydrocarbon contaminants from the acid-gas feed to Claus sulfur-recovery units has been successfully pilot tested in Saudi Arabia. Pilot plant results are discussed here along with issues involved in scale-up to commercial size. Heavy hydrocarbons, particularly benzene, toluene, and xylene (BTX) have been linked to coke formation and catalyst deactivation in Claus converters. This deactivation results in reduced sulfur recovery and increased sulfur emissions from these plants. This effect is especially evident in split-flow Claus plants which bypass some of the acid-...

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