Measurements of the Kinetics of the Reaction of OH Radicals with 3‐Methylfuran at Low Pressure

Abstract

The rate constant for the reaction of OH with 3‐methylfuran was measured at 2, 4, and 6 Torr using discharge‐flow techniques coupled with laser‐induced fluorescence detection of OH. The measured rate constant (k) at 298 ± 2 K was (9.1 ± 0.3) × 10−11 cm3 molecule−1 s−1, where the quoted uncertainty reflects twice the standard error of the measurements. This result is in good agreement with previously reported relative rate constant measurements at atmospheric pressure and room temperature. An Arrhenius expression of k = (3.2 ± 0.4) × 10−11 e(310 ± 40)/T cm3 molecule−1 s−1 was determined from measurements of the rate constant between 273 and 368 K. The negative temperature dependence agrees with previously reported theoretical calculations for the reaction of OH with 3‐methylfuran and previously reported measurements of the temperature dependences of the rate constants for the reaction of OH with similar heterocyclic organics such as furan and thiophene.

Emissions of non-methane volatile organic compounds from combustion of domestic fuels in Delhi, India

“…The harmful emissions from burning also resulted in an estimated 2.8-3.9 million premature deaths due to household air pollution (Kodros et al, 2018;WHO, 2018;Smith et al, 2014), of which 27 % originated from pneumonia, 18 % from strokes, 27 % from ischaemic heart disease, 20 % from chronic obstructive pulmonary disease and 8 % from lung cancer, with hazardous indoor air pollution responsible for 45 % of pneumonia deaths in children less than 5 years old (WHO, 2018). For this reason, hazardous indoor air pollution from the combustion of solid fuels has been calculated to be the most important risk factor for the burden of disease in South Asia from a range of 67 environmental and lifestyle risks (Lim et al, 2012;Smith et al, 2014).…”

Secondary organic aerosol formation from photooxidation of furan: effects of NO<sub><i>x</i></sub> and humidity

“…Another possibility for the increasing trend of SOA yield with the increase in RH might result from the SOA formation through aqueous chemistry in wet aerosols (Grgic et al, 2010;Lim et al, 2010). In these atmospheric processes, alcohols, aldehydes, and ketones formed from the photooxidation of furan in the gas phase can be absorbed into the humid surface of the hygroscopic SOA at high RH.…”

“…Besides the mixed effect of NO x level on SOA formation, the RH can significantly alter the sizes of SOA particles, depending on their hygroscopicity (Varutbangkul et al, 2006), their gas-phase reactions involving water (Jonsson et al, 2006), and the aqueous chemistry occurring at their surfaces (Lim et al, 2010;Grgic et al, 2010). The photooxidation experiments with aromatic compounds, such as toluene (Edney et al, 2000;Cao and Jang, 2010;Faust et al, 2017;Hinks et al, 2018), benzene and ethylbenzene (Jia and Xu, 2014), m-xylene (Zhou et al, 2011), and 1,3,5-trimethylbenzene (Cocker et al, 2001) have been carried out previously to study the effect of RH on SOA formation.…”

Supplementary material to "Volatile organic compounds (VOCs) in photochemically aged air from the Eastern and Western Mediterranean"

“…G45128: Rate constant by Liljegren and Stevens (2013). A lumped RO 2 that upon conversion to RO yields 100% 2-methyl-butenedial (ZCODC23DBCOD) although Aschmann et al (2014) quantified a 38% yield of the Z/E mixture.…”