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DTSTAMP:20240516T165719Z
LOCATION:275-277
DTSTART;TZID=America/Chicago:20240516T080000
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UID:IOSC_IOSC 2024_sess143_PAPER175@linklings.com
SUMMARY:Fate and Behaviour of Diesels (B0, B10, B30) and Biodiesels (FAME,
  HVO) in Case of an Accidental Spill
DESCRIPTION:Paper\n\nRonan JEZEQUEL, Karine TREGUER, Justine RECEVEUR, and
  Stéphane LE FLOCH (Cedre)\n\nFollowing an accidental spill of biodiesel i
 n inland waters (France, 2016), Cedre with the support of TotalEnergies de
 cided to initiate a project to better understand the behaviour fate of die
 sels and biodiesels in case of accidental spill in fresh or marine waters.
  Three diesels (B0, B10 and B30) and two biodiesels (FAME and HVO) were st
 udied during a 4-years project. The influence of natural weathering proces
 ses were assessed at laboratory and pilot scale in Cedre’s flume tank. The
  different parameters measured were density, viscosity, emulsification, oi
 l adhesion to oleophilic material, natural dispersion and biodegradability
 . An efficiency test of a drum skimmer on diesel B10 (fresh and weathered)
  was also integrated in the study.\nAfter one day of weathering, both dies
 els and biodiesels tended to mix with water and form a sort of “emulsion”.
  However, this mixture did not appear stable if the agitation was stopped.
  After one week of weathering, the total dispersion of B0, B10 and B30 was
  measured in the water column (formation of a white cloud of droplets). Th
 is result highlights that in turbulent condition (i) diesels and biodiesel
 s disperse naturally after a few days of weathering, (ii) mechanical recov
 ery will be effective only during the first 2 to 3 days after the spill oc
 curs. If the agitation was stopped, oil droplets recoalesced to form a sli
 ck of weathered diesel. Additionally to this recoalescence, a foam-like su
 bstance was also observed at the water surface. The formation of this very
  sticky “foam” (not soluble in solvents such as methylene chloride, hexane
 , pentane, acetone) was also observed in the field and caused a lot of pro
 blems during mechanical recovery. As regard to the weathering processes, t
 he evaporation / biodegradation rate reach a maximum of 62% for B0, 69% fo
 r B10 and 72% for B30. \nRegarding the biodiesels FAME and HVO, as observe
 d for the diesels, during the first day, they tended to emulsify and then,
  after few days of weathering, they tended to dispersed naturally for an a
 gitated environment. As regard to the weathering processes, no dissolution
  or evaporation were measured. Biodegradation of the two products reached 
 99% in lab conditions.\n\nAll the results of and feedback from real spill 
 involving diesels or biodiesels have been summarized and are available as 
 a chemical response guide.\n\nTag: Response\n\nSession Chair: Jodi Harney 
 (Continental Shelf Associates)
URL:https://iosc2024.conference-program.com/presentation/?id=PAPER175&sess
 =sess143
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