Configurations and methods for removal of mercaptans from feed gases

A gas treatment plant comprising:

• a COS hydrolysis unit configured to hydrolyze COS in a mercaptan-containing feed gas to form a treated feed gas;
• an absorber fluidly coupled to the COS hydrolysis unit and further fluidly coupled to a first and a second conduit that are configured to provide a first and a second lean hydrocarbon fluid to the absorber;
• wherein the absorber is configured to allow contacting of the treated feed gas with the first and a second lean hydrocarbon fluid to thereby produce a mercaptan enriched hydrocarbon fluid and a desulfurized product gas;
• a distillation column coupled to the absorber and configured to receive the mercaptan enriched hydrocarbon fluid and further configured to produce a light overhead vapor and a sulfur rich bottom product;
• and
• a hydrocarbon processing unit comprising a hydrotreater, wherein the hydrocarbon processing unit is fluidly coupled to the distillation column and configured to receive the sulfur rich bottom product and to produce a sulfur-containing product and at least one of the first and second lean hydrocarbon fluid.