ISSN:
1573-0662
Keywords:
Soot particles
;
polycyclic aromatic hydrocarbons
;
NO2
;
HNO3
;
heterogeneous reactions
;
kinetics
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Geosciences
Notes:
Abstract An experimental technique for studying atmospheric heterogeneous reactions of polyaromatic hydrocarbons (PAH) on particle surfaces is reported. Particle bound organics were reacted in a 200 liter Teflon continuous stirred tank reactor (CSTR), with vapor phase oxidants. To provide a source of chemically stable particles for the CSTR, soot particles from a residential wood stove were first introduced during under darkness into a 25 m3 outdoor Teflon chamber. Air containing the particles was then added at a constant flow to the CSTR. The rates of heterogeneous reactions were obtained by comparing reacted particle samples with unreacted ones. The derivation of rate expressions for heterogeneous reactions in the CSTR is described. The use of the technique for a study of the nitration of selected soot particle bound PAH species by NO2 and HNO3 is demonstrated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00115776
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