Rate Coefficients for the Gas-Phase Reactions of Nitrate Radicals with a Series of Furan Compounds

Abstract

The atmospheric reaction of a series of furan compounds (furan (F), 2methylfuran (2-MF), 3-methylfuran (3-MF), 2,5-dimethylfuran (2,5-DMF), and 2,3,5trimethylfuran (2,3,5-TMF)) with nitrate radical (NO 3 ) has been investigated using the relative rate kinetic method in the CHamber for the Atmospheric Reactivity and the Metrology of the Environment (CHARME) simulation chamber at the laboratoire de Physico-Chimie de l'Atmosphere (LPCA) laboratory (Dunkerque, France). The experiments were performed at (294 ± 2) K atmospheric pressure and under dry conditions (relative humidity, RH < 2%) with proton transfer mass reaction−time of flight−mass spectrometer (PTR-ToF-MS) for the chemical analysis. The following rate coefficients (in units cm 3 molecule −1 s −1 ) were determined: furan, 5.82 ± 1.21) × 10 −11 , and 2,3,5-trimethylfuran, k (2,3,5-TMF) = (1.66 ± 0.69) × 10 −10 . The uncertainty on the measured rate coefficient (Δk FC ) includes both the uncertainty on the measurement and that on the rate coefficient of the reference molecule. To our knowledge, this work represents the first determination for the rate coefficient of the 2,3,5-TMF reaction with NO 3 . This work shows that the reaction between furan and methylated furan compounds with nitrate radical (NO 3 ) is the dominant removal pathway during the night with lifetimes between 0.5 and 55 min for the studied molecules.

Rate coefficients for the gas‐phase OH + furan (C4H4O) reaction between 273 and 353 K

“…The furan atmospheric lifetime due to OH reactive loss, τ(OH), using k from this work and a globally averaged OH concentration of 10 6 molecule cm −3 , was estimated to be 6.2 h. Newland et al 44 and Al Ali et al 45 have reported room temperature rate coefficients for the NO 3 radical + C 4 H 4 O reaction to be (1.49 ± 0.23) × 10 −12 and (1.51 ± 0.38) × 10 −12 cm 3 molecule −1 s −1 , respectively. They estimated daytime and nighttime furan lifetimes, τ(NO 3 ), of 19 and ∼1 h, respectively, for NO 3 reactive loss using 1 × 10 7 (daytime) and 2 × 10 8 (nighttime) molecule cm −3 NO 3 radical concentrations.…”

“…Newland et al 44 . and Al Ali et al 45 . have reported room temperature rate coefficients for the NO 3 radical + C 4 H 4 O reaction to be (1.49 ± 0.23) × 10 −12 and (1.51 ± 0.38) × 10 −12 cm 3 molecule −1 s −1 , respectively.…”

Emissions and Atmospheric Chemistry of Furanoids from Biomass Burning: Insights from Laboratory to Atmospheric Observations

“…The value reported in Atkinson et al 140 has been updated using the IUPAC recommended rate coefficient for the NO 3 + trans-2butene reaction. The rate coefficients of the reference molecules used in the studies of Kind et al, 141 Newland et al, 142 and Al Ali et al 143 are consistent with IUPAC recommendations and therefore have not been adjusted. The relative rate kinetic results agree to within 33% across all of these studies The rate constant reported by Kind et al 141 is lower than others, and when excluded, the remaining studies agree to within 5%.…”

“…Each study determined rate coefficients using the relative rate method. Kind et al 141 used 2,3-dimethyl-2-butene as a reference molecule, Alvarado et al 144 used 2-methyl-2-butene and Tapia et al 125 used α-pinene, while Al Ali et al 143 used 2-methyl-2-butene, γ-terpinene, and αpinene. Kind et al 141 reported a rate coefficient that is independent of pressure between 5 and 150 Torr.…”

Drug release control and anti-inflammatory effect of biodegradable polymer surface modified by gas phase chemical functional reaction

“…Plasma technology is an optimal method for surface modification that can be applied quickly and easily with fewer external physical and chemical influences than chemical methods or laser irradiation [19,20]. In this study, material surface modification was carried out through the gas-phase plasma process at atmospheric pressure, which has been used in various fields for a long time, and its safety and effectiveness have been verified [21][22][23].…”