Formation of methyl nitrite and methyl nitrate during plasma treatment of diesel exhaust

TJ Wallington; JW Hoard; Mads Peter Sulbæk Andersen; MD Hurley

doi:10.1021/es034126i

Formation of methyl nitrite and methyl nitrate during plasma treatment of diesel exhaust

TJ Wallington, JW Hoard, Mads Peter Sulbæk Andersen, MD Hurley

Kemisk Institut

8 Citationer (Scopus)

Abstract

FIR spectroscopy was used to identify CH3ONO and CH3ONO2 as products of the nonthermal plasma treatment of simulated diesel exhaust. This is the first observation of CH3ONO formation in such systems. The yield of CH3ONO relative to CH3ONO2 scaled linearly with the average [NO]/ [NO2] ratio in the system. A plot of [CH3ONO]/[CH3ONO2] versus [NO]/[NO2] gives a slope of 1.81 +/- 0.30. This result is indistinguishable from the literature value of the rate constant ratio k(CH3O + NO)/k(CH3O + NO2) = (2.6 x 10(-11))/ (1.5 x 10(-11)) = 1.73 +/- 0.37. The experimental observations suggest that reactions of CH3O radicals with NO and NO2 are the sources of CH3ONO and CH3ONO2 in such systems. The linear relationship between the yields of CH3ONO and CH3ONO2 provides a means of estimating the yield of these compounds during nonthermal plasma treatment of diesel exhaust.

Originalsprog	Udefineret/Ukendt
Tidsskrift	Environmental Science & Technology (Washington)
Vol/bind	37
Udgave nummer	18
Sider (fra-til)	4242-4245
Antal sider	4
ISSN	0013-936X
DOI	https://doi.org/10.1021/es034126i
Status	Udgivet - 15 sep. 2003

Adgang til dokumentet

10.1021/es034126i

Citationsformater

@article{914811ddb0d0467680974927cf41ff14,

title = "Formation of methyl nitrite and methyl nitrate during plasma treatment of diesel exhaust",

abstract = "FIR spectroscopy was used to identify CH3ONO and CH3ONO2 as products of the nonthermal plasma treatment of simulated diesel exhaust. This is the first observation of CH3ONO formation in such systems. The yield of CH3ONO relative to CH3ONO2 scaled linearly with the average [NO]/ [NO2] ratio in the system. A plot of [CH3ONO]/[CH3ONO2] versus [NO]/[NO2] gives a slope of 1.81 +/- 0.30. This result is indistinguishable from the literature value of the rate constant ratio k(CH3O + NO)/k(CH3O + NO2) = (2.6 x 10(-11))/ (1.5 x 10(-11)) = 1.73 +/- 0.37. The experimental observations suggest that reactions of CH3O radicals with NO and NO2 are the sources of CH3ONO and CH3ONO2 in such systems. The linear relationship between the yields of CH3ONO and CH3ONO2 provides a means of estimating the yield of these compounds during nonthermal plasma treatment of diesel exhaust.",

author = "TJ Wallington and JW Hoard and Andersen, {Mads Peter Sulb{\ae}k} and MD Hurley",

year = "2003",

month = sep,

day = "15",

doi = "10.1021/es034126i",

language = "Udefineret/Ukendt",

volume = "37",

pages = "4242--4245",

journal = "Environmental Science & Technology",

issn = "0013-936X",

publisher = "American Chemical Society",

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}

TY - JOUR

T1 - Formation of methyl nitrite and methyl nitrate during plasma treatment of diesel exhaust

AU - Wallington, TJ

AU - Hoard, JW

AU - Andersen, Mads Peter Sulbæk

AU - Hurley, MD

PY - 2003/9/15

Y1 - 2003/9/15

N2 - FIR spectroscopy was used to identify CH3ONO and CH3ONO2 as products of the nonthermal plasma treatment of simulated diesel exhaust. This is the first observation of CH3ONO formation in such systems. The yield of CH3ONO relative to CH3ONO2 scaled linearly with the average [NO]/ [NO2] ratio in the system. A plot of [CH3ONO]/[CH3ONO2] versus [NO]/[NO2] gives a slope of 1.81 +/- 0.30. This result is indistinguishable from the literature value of the rate constant ratio k(CH3O + NO)/k(CH3O + NO2) = (2.6 x 10(-11))/ (1.5 x 10(-11)) = 1.73 +/- 0.37. The experimental observations suggest that reactions of CH3O radicals with NO and NO2 are the sources of CH3ONO and CH3ONO2 in such systems. The linear relationship between the yields of CH3ONO and CH3ONO2 provides a means of estimating the yield of these compounds during nonthermal plasma treatment of diesel exhaust.

AB - FIR spectroscopy was used to identify CH3ONO and CH3ONO2 as products of the nonthermal plasma treatment of simulated diesel exhaust. This is the first observation of CH3ONO formation in such systems. The yield of CH3ONO relative to CH3ONO2 scaled linearly with the average [NO]/ [NO2] ratio in the system. A plot of [CH3ONO]/[CH3ONO2] versus [NO]/[NO2] gives a slope of 1.81 +/- 0.30. This result is indistinguishable from the literature value of the rate constant ratio k(CH3O + NO)/k(CH3O + NO2) = (2.6 x 10(-11))/ (1.5 x 10(-11)) = 1.73 +/- 0.37. The experimental observations suggest that reactions of CH3O radicals with NO and NO2 are the sources of CH3ONO and CH3ONO2 in such systems. The linear relationship between the yields of CH3ONO and CH3ONO2 provides a means of estimating the yield of these compounds during nonthermal plasma treatment of diesel exhaust.

U2 - 10.1021/es034126i

DO - 10.1021/es034126i

M3 - Tidsskriftartikel

SN - 0013-936X

VL - 37

SP - 4242

EP - 4245

JO - Environmental Science & Technology

JF - Environmental Science & Technology

IS - 18

ER -