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Mercaptans level in Coker LPG

Home Forums Coking Technical Fractionation & Process Process Mercaptans level in Coker LPG

This topic contains 4 replies, has 3 voices, and was last updated by  Gergely Boha 12 years, 8 months ago.

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  • #3475

    Cassandra Bramwell
    Participant

    My refinery is in the FEED stage of putting in a Delayed Coking Unit (DCU). The DCU licensor has provide a total mercaptan value of 1200 ppm. This value seems high, can anyone say what is the typical total mercaptan seen in the Coker LPG stream prior to treatment? ( Crude API 22)

  • #6640

    Gergely Boha
    Participant

    I can’t tell you an average value for mercaptane level (depends on feed). But 1200 ppm does not seem to be a high value for me. I usually experience greater mercaptane level than indicated.

  • #5877

    Anonymous

    1200 ppm is not high by any means.  I would say that this would be great if it was obtainable.

  • #5867

    Anonymous

    well, this depend of the vacumm that are you going to process and the composition of the LPG, for example mixed butane can contain around 300 wppm H2S, 6000 wppm RSH and 20 wppm COS after amine tower

  • #5866

    Anonymous

    in propane around 1000 wppm RSH, 100-200 wppm H2S, Butanes around 1000-2000 wppm RSH

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