AM-14-48 Caustic Scrubber Designs for H2S Removal from Refinery Gas Streams

Description:

Caustic scrubbing is a technology that has been used for the removal of H2S and other acid species from gases in different industries for many years. Improvements in design and control strategies, favorable prices for caustic compared with other non-regenerable H2S scavenging chemicals, and the potential for sales value for the NaHS (sodium bisulfide) product have made caustic scrubbing an economic and viable option for some refinery streams. Caustic scrubber designs are available to treat sour refinery fuel gas both with and without CO2, sour water stripper (SWS) gas, acid gas from amine units, and other refinery gas streams. This paper will review caustic scrubber designs applicable to these applications.