Document Detail

Solid vapor pressure for five heavy PAHs via the Knudsen effusion method.
MedLine Citation:
PMID:  22021935     Owner:  NLM     Status:  Publisher    
Polycyclic aromatic hydrocarbons (PAHs) are compounds resulting from incomplete combustion and many fuel processing operations, and they are commonly found as subsurface environmental contaminants at sites of former manufactured gas plants. Knowledge of their vapor pressures is the key to predict their fate and transport in the environment. The present study involves five heavy PAHs, i.e. benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[ghi]perylene, indeno[1,2,3-cd]pyrene, and dibenz[a,h]anthracene, which are all as priority pollutants classified by the US EPA. The vapor pressures of these heavy PAHs were measured by using Knudsen effusion method over the temperature range of 364 K to 454 K. The corresponding values of the enthalpy of sublimation were calculated from the Clausius-Clapeyron equation. The enthalpy of fusion for the 5 PAHs was also measured by using differential scanning calorimetry and used to convert earlier published sub-cooled liquid vapor pressure data to solid vapor pressure in order to compare with the present results. These adjusted values do not agree with the present measured actual solid vapor pressure values for these PAHs, but there is good agreement between present results and other earlier published sublimation data.
Jinxia Fu; Eric M Suuberg
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Publication Detail:
Journal Detail:
Title:  The Journal of chemical thermodynamics     Volume:  43     ISSN:  0021-9614     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-10-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9890558     Medline TA:  J Chem Thermodyn     Country:  -    
Other Details:
Languages:  ENG     Pagination:  1660-1665     Citation Subset:  -    
Brown University Department of Chemistry, Providence, RI USA 02912.
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Grant Support
P42 ES013660-07//NIEHS NIH HHS

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