Atmospheric Chemistry of Trimethoxymethane, (CH3O)3CH; Laboratory Studies
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
Atmospheric Chemistry of Trimethoxymethane, (CH3O)3CH; Laboratory Studies. / Platz, J.; Sehested, J.; Nielsen, O. J.; Wallington, T. J.
I: Journal of Physical Chemistry A, Bind 103, Nr. 15, 01.12.1999, s. 2632-2640.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Atmospheric Chemistry of Trimethoxymethane, (CH3O)3CH; Laboratory Studies
AU - Platz, J.
AU - Sehested, J.
AU - Nielsen, O. J.
AU - Wallington, T. J.
PY - 1999/12/1
Y1 - 1999/12/1
N2 - A pulse radiolysis technique was used to measure the UV absorption spectra of (CH3O)2CHOCH2(.) and (CH3O)2CHOCH2O2(.) radicals derived from trimethoxymethane over the range 220-320 nm, σ250 nm (CH3O)2- CHOCH2(.) = (2.8 ± 0.4) × 10-18 and σ250nm (CH3O)2CHOCH2O2(.) = (3.5 ± 0.4) × 10-18 cm2 molecule-1. The self-reaction rate constants for (CH3O)2CHOCH2(.) and (CH3O)2CHOCH2O2(.) radicals, defined as -d[(CH3O)2CHOCH2(.)]/dt = 2k5[(CH3O)2CHOCH2(.)]2 and -d[(CH3O)2CHOCH2O2(.)]/dt = 2k6, obS[(CH3O)2-CHOCH2O 2(.)]2 were k5 = (3.5 ± 0.5) × 10-11 and k6 obs = (1.3 ± 0.2) × 10-11 cm3 molecule-1 s-1. Rate constants for reactions of (CH3O)2CHOCH2O2(.) radicals with NO and NO2 were k7 = (9.0 ± 1.2) × 10-12 and k8 = (1.0 ± 0.2) × 10-11 cm3 molecule-1 s-1, respectively. Rate constants for the reaction of OH radicals and F atoms with trimethoxymethane and the reaction of (CH3O)2CHOCH2(.) radicals with O2 were k1 = (6.0 ± 0.5) × 10-12, k3 = (3.0 ± 0.7) × 10-10, and k2 = (9.2 ± 1.5) × 10-12 cm3 molecule-1 s-1, respectively. Relative rate techniques were used to measure k(Cl + trimethoxymethane) = (1.5 ± 0.2) × 10-1 cm3 molecule-1 s-1. OH-radical-initiated oxidation of trimethoxymethane in air gives dimethyl carbonate in a molar yield of 81 ± 10%. These results are discussed with respect to the atmospheric chemistry of automotive fuel additives.
AB - A pulse radiolysis technique was used to measure the UV absorption spectra of (CH3O)2CHOCH2(.) and (CH3O)2CHOCH2O2(.) radicals derived from trimethoxymethane over the range 220-320 nm, σ250 nm (CH3O)2- CHOCH2(.) = (2.8 ± 0.4) × 10-18 and σ250nm (CH3O)2CHOCH2O2(.) = (3.5 ± 0.4) × 10-18 cm2 molecule-1. The self-reaction rate constants for (CH3O)2CHOCH2(.) and (CH3O)2CHOCH2O2(.) radicals, defined as -d[(CH3O)2CHOCH2(.)]/dt = 2k5[(CH3O)2CHOCH2(.)]2 and -d[(CH3O)2CHOCH2O2(.)]/dt = 2k6, obS[(CH3O)2-CHOCH2O 2(.)]2 were k5 = (3.5 ± 0.5) × 10-11 and k6 obs = (1.3 ± 0.2) × 10-11 cm3 molecule-1 s-1. Rate constants for reactions of (CH3O)2CHOCH2O2(.) radicals with NO and NO2 were k7 = (9.0 ± 1.2) × 10-12 and k8 = (1.0 ± 0.2) × 10-11 cm3 molecule-1 s-1, respectively. Rate constants for the reaction of OH radicals and F atoms with trimethoxymethane and the reaction of (CH3O)2CHOCH2(.) radicals with O2 were k1 = (6.0 ± 0.5) × 10-12, k3 = (3.0 ± 0.7) × 10-10, and k2 = (9.2 ± 1.5) × 10-12 cm3 molecule-1 s-1, respectively. Relative rate techniques were used to measure k(Cl + trimethoxymethane) = (1.5 ± 0.2) × 10-1 cm3 molecule-1 s-1. OH-radical-initiated oxidation of trimethoxymethane in air gives dimethyl carbonate in a molar yield of 81 ± 10%. These results are discussed with respect to the atmospheric chemistry of automotive fuel additives.
UR - http://www.scopus.com/inward/record.url?scp=0001272146&partnerID=8YFLogxK
M3 - Journal article
AN - SCOPUS:0001272146
VL - 103
SP - 2632
EP - 2640
JO - Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory
JF - Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory
SN - 1089-5639
IS - 15
ER -
ID: 223681309