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• Is CCR value directly linked with asphaltene content? In hyrocracker feed specification why limit is fixed for both CCR and Asphaltene content? Why both parameters are measured separately?

  Sep-2023

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Answers

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• SRIDHAR BALAKRISHNAN, NAGARJUNA OIL CORPORATION LIMITED, laksrid@yahoo.com

  Condradson Carbon Residue (CCR) parameter has correlations with asphaltene content parameter of particularly  heavy cracked distillates.Higher the CCR values, higher the asphaltene content value will be. Other parameters like H/C ratio, components of SARA  parameter (saturates, aromatics and resins) can also influence the values to an extent.

   

  Oct-2023

• Marcio Wagner da Silva, Petrobras, marciows@petrobras.com.br

  The CCR analysis is directly related with asphaltenes content which are responsible of the most part of coke laydown tendency  from the residue, but another components like resins, aromatics and saturated hydrocarbons can contribute with the stability of the  residue and influence over the feed quality of residue hydrotreating or hydrocracking unit as well as with the expected yields of distillates . Normally, it's carried out complimentary analysis to CCR like SARA (Saturate, Aromatics, Resins, and Asphaltenes) and H/C ratio to allow a most adequate analysis of the stability of the feedstock and the coke laydown tendency which will determine fundamental operating parameters like hydrogen partial pressure necessary to ensure an adequate and economic life cycle for the processing unit.

   

  Oct-2023