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Typical H2S yields from coking

Home Forums Coking Technical Fractionation & Process Process Typical H2S yields from coking

This topic contains 3 replies, has 2 voices, and was last updated by  Lucibar Davalillo 15 years ago.

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  • #3734


    Does anyone have a predicted yield of hydrogen sulfide (H2S) for each unit mass of heavy oil cracked? 

  • #6970

    Lucibar Davalillo

    First at all, please be aware that there is not a single value and following information is from my own experience developed chart. I have found that H2S wt% of total mass can be determined from 0.21 to 0.41 times Coker feed S(wt%); however it is not linear and only valid for a limited S(wt%) range of 3.3-4.1.
    As an example, 3.5 wt% S in Coker feed would result in 0.28-0.30 times or about 1wt% total feed mass.
    Hope this helps,

  • #6968


    Great input Lucky, thanks.  I have a feed pretty high in S content though, 5.7 wt% so while it lies outside of your developed chart: could you predict what kind of h2s release I would be looking at (if some kind of prediction could be given?)

    Also, I’m looking at only partially coking/cracking the heavy oil feed.  Around a 30% conversion to be precise, and about 40% of the S in the feed is sulfides (the S molecules easily removed from oils by coking) if this is of any relevance.

  • #6967

    Lucibar Davalillo

    Perhaps we could exchange some more information and help improving my data with yours; if you agree, please contact me at

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