When natural gas contains H2S and CO2, selective amine sweetening technology allows achieving stringent H2S specification and partial CO2 removal. Total designed a few years ago a selective amine unit for natural gas treatment, to eliminate the H2S content while keeping the CO2 within a range of 1.5 to 1.7 mol%. The design combined the use of formulated MDEA, multiple injections of amine and a mix of trays and structured packing bed in the absorber.
