Presentation Profile

Recent developmewnts and Validation of a More Accurate Tool for Fuel Clarity by D8148, Spectroscopic Method for Haze in Fuels

Currently Scheduled: 10/11/2022 - 8:40 AM - 9:10 AM
Room: Tulip

Main Author
Ranzy Morgan - Choice Analytical Inc.

Abstract Number: 132

Recent Developments and Validation of a more accurate tool for Fuel Clarity by D8148 Spectroscopic method for Haze in Fuels   Providing fuel with the necessary cleanliness has been desirable since the earliest days of motorized transportation. Engine manufacturers expend significant effort to protect sensitive components of modern high pressure fuel systems from fuel contaminants. With an unprecedented number of new fuel types and feedstocks entering the worlds fuel supply, the industry is becoming increasingly concerned about fuel cleanliness and clarity. Over the decades, engine manufacturers, fuel producers and fuel distributors, worked within ASTM to establish specification limits for fuel haziness and clarity. Because of the variability and subjectivity found with the current visible methods such as D4176 and because ASTM specifications may be applied anywhere within the fuel distribution systems, fuel pipelines and transport companies have traditionally not supported these efforts. During the last five years, major pipelines have worked closely to support the optics-based technology found in D8148. ASTM D8148 Haze Clarity index is an instrumental objective technique which eliminates the subjectivity of the visual haze methods. D8148 measures and reports haze results in two formats 1) Instrumental Haze Rating (IHR) ranging from 1-6 which is calibrated to be equivalent to the D4176 Visual Haze rating, and 2) Haze Clarity Index (HCI) ranging from 50-100.  HCI provides greater resolution and specificity of fuel cleanliness.  With the large amount of data provided in the recent D8148 Interlaboratory Study, as well as CRC report 675, which compares D8148 to D4176 and actual amounts of water in fuel samples, it may be the time to seriously reconsider putting measurable limits around fuel cleanliness. This presentation will review the D8148 method, recent ILS results along with the data and conclusions presented in CRC report number 675.

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