Patent ID: 8696791
Filing Date: 2014-04-15
Classification: B01D,C07C,Y02C

Abstract:
1. A method of removing sulfur from a gas stream comprising the steps of: a. contacting the gas stream with a solvent to selectively absorb at least a portion of elemental sulfur from the gas stream; b. filtering entrained liquid droplets from the gas stream so that sulfur does not become deposited on a gas separation membrane; c. passing the gas stream through the gas separation membrane; d. analyzing a sulfur concentration of an overhead stream of the solvent scrubber and sending the gas stream to a second column if the sulfur concentration exceeds a sulfur solubility estimated in retentate and permeate flows by a membrane separation process simulation; and e. regenerating the solvent by sending a gas capable of dissolving sulfur through the solvent scrubber.