OH Initiated Oxidation of VOC under Variable NOx Conditions

Becker, K. H.; Barnes, Ian; Bierbach, A.; Brockmann, Klaus J.; Kirchner, F.; Klotz, Björn; Libuda, H. G.; Mayer-Figge, A.; Mönninghoff, Simone; Ruppert, L.; Thomas, William G.; Wiesen, E.; Wirtz, Klaus; Zabel, F.

doi:10.1007/978-3-642-59216-4_4

Cited by 15 publications

(22 citation statements)

References 10 publications

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“…In a mixture of VOCs, differences in the binding ability of the compounds will affect the reaction rates. In the tropospheric degradation of VOCs, ring opened compounds have been reported (Atkinson 1994;Becker et al 1992;Beirbach et al 1994a, b;. Representative reconstructed ion chromatogram of VOCs identified at Restaurant with and without ozonization unit, is shown in Fig.…”

Section: Resultsmentioning

confidence: 95%

Indoor Air Quality of Public Places in Mumbai, India in Terms of Volatile Organic Compounds

Srivastava

Devotta

2007

Environ Monit Assess

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Indoor air quality at nine locations viz. food courts, restaurant, bar, conference room, office and theater, which can be classified as public places have been monitored for Volatile Organic Compounds (VOCs) content. Forty VOCs have been identified and one fourth of these are classified as Hazardous Air Pollutants. Levels of most VOCs are observed to be below the guideline values for public places and offices, as adopted by Hong Kong. Consumer goods are found to be predominant source of chlorinated VOCs in indoor air. Levels of benzene and carbon tetrachlorides were observed to be above the guideline values at all the locations. Effect of ozonisation on Total VOC concentrations have also been studied.

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Section: Resultsmentioning

confidence: 95%

Indoor Air Quality of Public Places in Mumbai, India in Terms of Volatile Organic Compounds

Srivastava

Devotta

2007

Environ Monit Assess

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“…The two data sets agree to well within the combined uncertainty, although our data predict a somewhat lower value for at low temperature. k Ϫ6 As discussed by Zabel and coworkers [34], the strength of the RO 2 9 NO 2 bond in organic peroxynitrates is determined by the electron density at the carbon adjacent to the peroxynitrate functionality. Thus, the presence of electron withdrawing substituents at this site increases the thermal stability of the peroxynitrate.…”

Section: Thermal Stability Of Ch 3 C(o)ch 2 O 2 Nomentioning

confidence: 96%

“…A nonweighted leastsquares fit to these data yields 16 k ϭ 1.9 ϫ 10 Ϫ6 exp(Ϫ 10830/T) . Previous measurements of the Ϫ1 s thermal decomposition of acetonylperoxynitrate, as well as a number of other peroxynitrates, have been made by Zabel and coworkers [34]. Their data for (ob-k Ϫ6 this species is incapable of acting as a long range carrier for NO x in the atmosphere.…”

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Atmospheric chemistry of acetone: Kinetic study of the CH3C(O)CH2O2+NO/NO2 reactions and decomposition of CH3C(O)CH2O2NO2

Sehested

Christensen

Nielsen

et al. 1998

Int. J. Chem. Kinet.

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“…It is a valuable intermediate in the synthesis of agrochemicals, insecticides and vitamin E. Xylenols can also be formed in the atmosphere by gas phase photo-oxidation of alkylbenzenes. [2][3][4][5][6][7][8][9] Ambient levels of dimethylphenols have been measured in urban atmosphere. 10 The results of these studies revealed a mean concentration of 11, and 33 ng m À3 for 2,6-dimethylphenol and for the sum of 2,4-and of 2,5-dimethylphenols, respectively.…”

Section: Introductionmentioning

confidence: 99%

Tropospheric multiphase chemistry of 2,5- and 2,6-dimethylphenols: determination of the mass accommodation coefficients and the Henry’s law constants

Diévart

Allou²,

Louis

et al. 2006

Phys. Chem. Chem. Phys.

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The uptake of 2,5-dimethylphenol and 2,6-dimethylphenol on aqueous surfaces was measured between 279 and 293 K, using the wetted-wall flow tube technique coupled with UV absorption spectroscopic detection. For both compounds, the uptake coefficients gamma were found to be independent of the KOH scavenger concentration in the range of 0.01 to 1 M (pH > pK(a)) and of the liquid-gas contact times. In addition, the uptake coefficients and the derived mass accommodation coefficients alpha show a negative temperature dependence in the investigated temperature range. The mass accommodation coefficients decrease from 1.1 x 10(-3) to 1.1 x 10(-4), and from 5.4 x 10(-4) to 6.4 x 10(-5) for 2,5-dimethylphenol and 2,6-dimethylphenol, respectively. These results are used to discuss the incorporation of these species into the liquid using the nucleation theory. Henry's law constants (HLC) of both compounds were directly measured using a dynamic equilibrium system based on the water/air equilibrium at the interface within the length of a microporous tube. The measurements were conducted over the range 278-293 K in both deionized water and 35 g L(-1) solution of NaCl. At 293 K and in pure water, HLC were found to be equal to (in units of M atm(-1)): 2,5-dimethylphenol, HLC = (1270 +/- 240); 2,6-dimethylphenol, HLC = (250 +/- 80). All of the values for HLC in 35 g L(-1) salt solution were 5-55% lower than the corresponding values in deionized water, depending on the compound and the temperature. These data (mass accommodation coefficients and Henry's law constants) were then used to estimate the partitioning of these phenolic compounds between gaseous and aqueous phases and the corresponding atmospheric lifetimes under clear sky (tau(gas)) and cloudy conditions (tau(multiphase)) have then been derived. The calculated multiphase lifetimes (in units of hours) are lower than those in gas phase at a cumulus temperature of 283 K (in parentheses): 2,5-dimethylphenol, 2.2 (3.5); 2,6-dimethylphenol, 3.8 (4.2).

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OH Initiated Oxidation of VOC under Variable NOx Conditions

Cited by 15 publications

References 10 publications

Indoor Air Quality of Public Places in Mumbai, India in Terms of Volatile Organic Compounds

Indoor Air Quality of Public Places in Mumbai, India in Terms of Volatile Organic Compounds

Atmospheric chemistry of acetone: Kinetic study of the CH3C(O)CH2O2+NO/NO2 reactions and decomposition of CH3C(O)CH2O2NO2

Tropospheric multiphase chemistry of 2,5- and 2,6-dimethylphenols: determination of the mass accommodation coefficients and the Henry’s law constants

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