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DTSTAMP:20240516T165719Z
LOCATION:288-290
DTSTART;TZID=America/Chicago:20240515T084000
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UID:IOSC_IOSC 2024_sess130_PAPER164@linklings.com
SUMMARY:Physico-Chemical Properties and Dispersibility of Low Sulphur Fuel
  Oils (LSFO) and Conventional Crude Oils
DESCRIPTION:Paper\n\nDevi Sundaravadivelu (Pegasus Technical Services, Inc
 .); Matthew Alloy (United States Coast Guard, Great Lakes Oil Spill Center
  of Expertise (GLCOE)); Mace Barron (US EPA (retired)); and Robyn Conmy an
 d Kiara Lech (US EPA)\n\nThe International Maritime Organization (IMO) imp
 lemented a new regulation in 2020 that limited the sulfur content of fuel 
 oil used on board ships to 0.5% (from 3.5% previously) in an effort to red
 uce sulfur oxide (SOx) emissions. The IMO estimates that this regulation, 
 known as "IMO 2020," will result in a 77% decrease in total SOx emissions 
 from ships annually. This has led to an increase in the use and transport 
 of Low Sulphur Fuel Oil (LSFO) with commensurate increasing risk of spills
 . The objective of this study was to examine the physico-chemical properti
 es and dispersibility of LSFOs in comparison to conventional crude oils (C
 COs). Three LSFOs (Wide Range Gas Oil, Marine Gas Oil and Bunker Fuel Oil)
  and three CCOs (Alaskan North Slope, Endicott and Dorado Crude Oil) were 
 tested. The density, percentage of sulphur, alkanes (n-C10 to n-C35), and 
 polycyclic aromatic hydrocarbons for these oils were evaluated to better u
 nderstand their physical and chemical properties. Dispersion Effectiveness
  (DE) using the standard baffled flask test, oil droplet size distribution
  using the Laser In Situ Scattering and Transmissometry probe (LISST-100X,
  Sequoia Scientific, Inc.) and the interfacial tension between the oil dro
 plet and the artificial seawater were evaluated to determine each oil’s ab
 ility to disperse at a lab scale. Results indicate that the physico-chemic
 al properties of the three LSFOs vary significantly amongst each other and
  from conventional crudes. The DE decreased with increasing density irresp
 ective of fuel class. A higher proportion of larger oil droplets were obse
 rved in samples with lower DE for the denser oils. These findings suggest 
 that the class of marine fuels collectively termed LSFOs can show a signif
 icant range in density, composition and dispersibility and the various typ
 es of LSFOs that are currently in use require further investigation to ful
 ly assess their properties, behavior, and impacts in the event of a spill.
 \n\nTag: Preparedness\n\nSession Chair: Will Griffiths (IMO)
URL:https://iosc2024.conference-program.com/presentation/?id=PAPER164&sess
 =sess130
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