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Citation
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HERO ID
3044681
Reference Type
Journal Article
Title
Probing Gas-Liquid Interfacial Dynamics by Helium Evaporation from Hydrocarbon Liquids and Jet Fuels
Author(s)
Lancaster, DK; Johnson, AM; Kappes, K; Nathanson, GM
Year
2015
Is Peer Reviewed?
Yes
Journal
Journal of Physical Chemistry C
ISSN:
1932-7447
EISSN:
1932-7455
Volume
119
Issue
26
Page Numbers
14613-14623
DOI
10.1021/jp512392b
Web of Science Id
WOS:000357623500018
Abstract
We have monitored the speeds of evaporating helium atoms dissolved in liquid octane, isooctane, 1-methylnaphthalene, dodecane, squalane, ethylene glycol, and two jet fuels. In all cases, the average kinetic energies of the evaporating He atoms exceed the Maxwellian value of 2RT. The energies roughly track solvent surface tensions; this correlation may reflect the tighter packing and attractions of interfacial solvent molecules that restrict the gaps through which He atoms escape. Mixtures of dodecane, squalane, and 1-methylnaphthalene generate He evaporation energies that lie between the pure liquid values. We find, however, that He atoms evaporate from pure 1-methylnaphthalene with kinetic energies lower than expected based on its high surface tension, perhaps because the sideways packing of the aromatic rings provides more direct channels for the escaping He atoms. Additionally, He evaporates from two complex fuel mixtures, Jet A and JP-8, with nearly identical energies, implying that the extra additives in JP-8 do not segregate to the surface in ways that alter the dynamics of evaporation.
Tags
•
Trimethylbenzenes (Interagency Science Discussion Draft)
Literature Search Update
Literature Search Update- Excluded
Excluded by Journal
Non Peer Reviewed
•
Trimethylbenzenes (TMB)
OPPT
•
Squalane
Literature Search
Fate
WOS (private)
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