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UPSC Chemistry

Nidhi T.
05/07/2017 0 0

What is correlation index in petroleum analysis ? How is it useful for classification of petroleum ?

For pure hydrocarbons,the normal paraffin series is given value of CI=0 and for benzene CI = 100.
CI= 473.7d - 456.8 + 48,640/TK
Where, TK for a petroleum fraction is the average boiling point (K) and ‘d’ is the specific gravity
  • CI Values between 0 and 15 : indicates a predominance of paraffin hydrocarbons in the fraction.
  • CI Values 15 to 50 : indicates predominance of either naphthenes or of mixtures of paraffins, naphthenes, and aromatics.
  • CI values more than 50 : indicates a predominance of aromatic species.

 

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