App for Calculated Cetane Index CCI based on ASTM D976
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.
Similar Apps on Petroleum Calculations developed by RJ Patel- see here.
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| CCI API Gravity & Mid Boiling Point F |
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| 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.
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