App for Calculated Cetane Index CCI based on ASTM D976

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This App is based on ASTM D976, covers the Calculated Cetane Index which directly estimates the ASTM Cetane Number of distillate fuels from API Gravity and mid boiling point. Second part of the App which has density at 15 C, (gm/mL) and mid boiling point in deg C.

 Similar Apps on Petroleum Calculations developed by RJ Patel- see here.

CCI API Gravity & Mid Boiling Point F

CCI Density 15C and Mid Boiling Point C


The Calculated Cetane Index is not an optional method for expressing ASTM cetane number. It is a supplementary tool to estimate cetane number when used with due regard for its limitations.

The Calculated Cetane Index formula is particularly applicable to straight-run fuels, catalytically cracked stocks, and blends of the two.

Test Method D4737 is the preferred method as estimator of cetane number and a separate App has been created based on this four variable CCI method.

The Calculated Cetane Index is one tool available for estimating ASTM cetane number where a test engine is not available for determining this property. It may be employed for approximating cetane number where the quantity of sample is too small for an engine rating. In cases where the cetane number of a fuel has been initially established, the index is useful as a cetane number check on subsequent samples of that fuel, provided its source and mode of manufacture remain unchanged.

Calculated Cetane Index, as described in Test Method D976–80, is recognized by the United States EPA as an alternative method to meet the U.S. Federal Diesel aromatics limit for diesel fuels containing less than 500 ppm sulfur.

You can obtain this app by writing to rjpatelioc2014@gmail.com.

Author's Profile clik here.                          
List of all blog articles on Petroleum QC  by RJ Patel.



 rjpatelioc2014@gmail.com

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Keywords: Cetane Number,   Cetane Index,  ASTM D976,  ASTM D4737,   Distillate fuels


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