Investigation of the Photochemical Reactivity of Soot Particles Derived from Biofuels Toward NO sub(2). A Kinetic and Product Study

In the current study, the heterogeneous reaction of NO sub(2) with soot and biosoot surfaces was investigated in the dark and under illumination relevant to atmospheric conditions (J sub(NO) sub(2)= 0.012 s super(-1)). A flat-flame burner was used for preparation and collection of soot samples from...

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Published in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2015-03, Vol.119 (10), p.2006-2015
Main Authors: Romanias, Manolis N, Dagaut, Philippe, Bedjanian, Yuri, Andrade-Eiroa, Aurea, Shahla, Roya, Emmanouil, Karafas S, Papadimitriou, Vassileios C, Spyros, Apostolos
Format: Article
Language:English
Subjects:
Biomass
Carbonates
Collection
Fuels
Furans
Nitrogen dioxide
Reaction kinetics
Soot
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Summary:In the current study, the heterogeneous reaction of NO sub(2) with soot and biosoot surfaces was investigated in the dark and under illumination relevant to atmospheric conditions (J sub(NO) sub(2)= 0.012 s super(-1)). A flat-flame burner was used for preparation and collection of soot samples from premixed flames of liquid fuels. The biofuels were prepared by mixing 20% v/v of (i) 1-butanol (CH sub(3)(CH sub(2)) sub(3)OH), (ii) methyl octanoate (CH sub(3)(CH sub(2)) sub(6)COOCH sub(3)), (iii) anhydrous diethyl carbonate (C sub(2)H sub(5)O) sub(2)CO and (iv) 2,5 dimethyl furan (CH sub(3)) sub(2)C sub(4)H sub(2)O additive compounds in conventional kerosene fuel (JetA-1). Experiments were performed at 293 K using a low-pressure flow tube reactor (P = 9 Torr) coupled to a quadrupole mass spectrometer. The initial and steady-state uptake coefficients, gamma sub(0) and gamma sub(ss), respectively, as well as the surface coverage, N sub(s), were measured under dry and humid conditions. Furthermore, the branching ratios of the gas-phase products NO ( similar to 80-100%) and HONO (
ISSN:1089-5639
1520-5215
DOI:10.1021/jp511468t