Document Detail


Desorption of polycyclic aromatic hydrocarbons from soot surface: pyrene and fluoranthene.
MedLine Citation:
PMID:  18826193     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The kinetics of thermal desorption of two four-ring polycyclic aromatic hydrocarbons, fluoranthene, and pyrene from well-characterized laboratory-generated kerosene soot surface was studied over the temperature range 260-320 K in a low-pressure flow reactor combined with an electron-impact mass spectrometer. Two methods were used to measure the desorption rate constants: monitoring of the surface-bound fluoranthene and pyrene decays due to desorption using off-line HPLC measurements of their concentrations in soot samples, and monitoring of the desorbed molecules in the gas phase using in situ mass spectrometric detection. Results obtained with the two methods were in good agreement and yielded the following Arrhenius expressions for the desorption rate constants: k(des) (fluoranthene) = 4 x 10(14) exp[-(93900 +/- 1700)/RT] and k(des) (pyrene) = 6 x 10(14) exp[-(95200 +/- 1800)/RT] (k(des) are in units of s(-1), and activation energies are in J mol(-1)). In addition, the combined uptake coefficient of fluoranthene and pyrene on soot (calculated using specific surface area) was estimated to be near 5 x 10(-3) at T = 310 K.
Authors:
Angélique Guilloteau; Mai Lan Nguyen; Yuri Bedjanian; Georges Le Bras
Related Documents :
15038533 - Comparison of scan-angle method and convective cloud differential method in retrieving ...
21851673 - Measurements of the acid-binding capacity of ingredients used in pig diets.
8146103 - Significance for humans of the nutrient contents of the dry fruit of tetrapleura tetrap...
Publication Detail:
Type:  Journal Article     Date:  2008-10-01
Journal Detail:
Title:  The journal of physical chemistry. A     Volume:  112     ISSN:  1520-5215     ISO Abbreviation:  J Phys Chem A     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-10-16     Completed Date:  2008-12-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9890903     Medline TA:  J Phys Chem A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  10552-9     Citation Subset:  IM    
Affiliation:
Institut de Combustion, Aerothermique, Reactivite et Environnement, CNRS, 45071 Orleans Cedex 2, France.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adsorption
Fluorenes / chemistry*
Kerosene*
Kinetics
Polycyclic Hydrocarbons, Aromatic / chemistry*
Pyrenes / chemistry*
Surface Properties
Temperature
Time Factors
Chemical
Reg. No./Substance:
0/Fluorenes; 0/Kerosene; 0/Polycyclic Hydrocarbons, Aromatic; 0/Pyrenes; 129-00-0/pyrene; 206-44-0/fluoranthene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Development of a finite-temperature density functional approach to electrochemical reactions.
Next Document:  High-resolution infrared spectroscopy of trans- and cis-H(18)ON(18)O: equilibrium structures of the ...