The design covers a greenfield Low Btu Gas (LBG) treating unit that treats gas from the Flexicoker. The unit produces a clean gas to be used as refinery fuel and a lean H2S acid gas stream, to be further treated in the existing SRU.
The LBG treating unit utilises the proprietary FLEXSORB® SE Plus solvent to selectively remove H2S from the Flexicoker LBG feed while minimizing the pick up of CO2. The unit is designed to remove H2S in the feed gas to 10 ppmv.
The new 1500 gpm FLEXSORB® unit is licensed by ExxonMobil Research and Engineering (EMRE). The unit selectively removes H2S from the CO2 rich Flexicoker LBG gas stream, reduces overall air emissions, and improves sulfur recovery.