Conradson carbon residue, commonly known as "Concarbon" or "CCR", is a laboratory test used to provide an indication of the coke-forming tendencies of an oil. Quantitatively, the test measures the amount of carbonaceous residue remaining after the oil's evaporation and pyrolysis.[1][2][3] In general, the test is applicable to petroleum products which are relatively non-volatile, and which decompose on distillation at atmospheric pressure.[4] The phrase "Conradson carbon residue" and its common names can refer to either the test or the numerical value obtained from it.

Test method

A quantity of sample is weighed, placed in a crucible, and subjected to destructive distillation. During a fixed period of severe heating, the residue undergoes cracking and coking reactions . At the termination of the heating period, the crucible containing the carbonaceous residue is cooled in a desiccator and weighed. The residue remaining is calculated as a percentage of the original sample, and reported as Conradson carbon residue.[4]

Applications

See also

References

  1. ^ Humboldt Testing Equipment. "Conradson Carbon Residue Apparatus". Archived from the original on 5 March 2016. Retrieved 27 November 2015.
  2. ^ Merriam-Webster. "Conradson Carbon Test". Merriam-Webster.com. Retrieved 27 November 2015.
  3. ^ International Standards Organization. "Petroleum products – Determination of carbon residue – Conradson method". Retrieved 27 November 2015.
  4. ^ a b c d e f ASTM International. "Standard Test Method for Conradson Carbon Residue of Petroleum Products" (PDF). Archived from the original (PDF) on 27 January 2018.
  5. ^ Colorado School of Mines. "Delayed Coking" (PDF). Retrieved 22 November 2015.
  6. ^ Shabron, John; Speight, James G. "Correlation between Carbon Residue and Molecular Weight" (PDF). Western Research Institute. Retrieved 27 November 2015.
  7. ^ Sadeghbeigi, Reza (2000). Fluid Catalytic Cracking Handbook: Design, Operation, and Troubleshooting of FCC Facilities. Gulf Professional Publishing. p. 52. ISBN 0884152898.
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