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Cracking temperature of Vacuum Residue

Home Forums Coking Cracking temperature of Vacuum Residue

This topic contains 2 replies, has 2 voices, and was last updated by  Anonymous 9 years, 12 months ago.

  • Author
  • #1719

    Freddy Martinez

    What is the temperature at which Vacuum Residue starts cracking?

  • #4520


    Cracking temperature is not a absolute temperature. but it depends on the VR molecules structure. Generaly cracking starts at 440 deg C(approx.)

  • #4464

    Mike Kimbrell

    I agree that the temperature that the various resid molecules start to crack is dependent on their molecular structure. I think the temperature that cracking starts is somewhat lower than the value listed. I think the temperature is approximately 400 C for the beginning of thermal cracking. The rate of cracking is fairly low at this temperature and the rate accelerates exponentially with temperature. The typical coke drum outlet temperature target is 440 C, so the initial cracking temperatures have to be lower.

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