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Do high nitrogenous crudes like plutonio, oman blend, zafiro play a role in deteriorating ATF saybolt color (KMU product), and if yes and if any detail analysis for such color instablity has done in the past, what is the correlation?
 
Answers
13/12/2011 A: keith bowers, B and B Consulting, kebowers47@gmail.com
The acronym 'ATF' is presumed to mean 'Aviation Turbine Fuel'
Nitrogen containing molecules in turbine fuel boiling range are not color stable. They will darken significantly on any exposure to air and on heating. Propensity for color degradation is a property unique to each crude source. I am not aware of any 'generalized' method of predicting color stability based on nitrogen content other than to say--higher nitrogen is worse.
08/12/2011 A: Sridhar Balakrishnan, Bharat Oman Refineries Limited , laksrid@yahoo.com
UOP 793 - Colour Stability of Petroleum Distillates - This method is for determining the colour stability of petroleum distillates. Based on comparison of the Saybolt Colour, ASTM D 156 , as determined on the ATF sample before and after a timed heating period, provides a direct indication of the colour stability of the sample. No datas are available.