Investigation of hydroxyl radical reactions with o-xylene and m-xylene in a continuous stirred tank reactor

Formation of ring‐retaining products from the OH radical‐initated reactions of o‐, m‐, and p‐xylene

“…Neither 3,5-dimethylphenol nor 2-nitro-m-xylene were observed from the m-xylene reaction system, in agreement with the previous study of Gery et al [29].…”

“…The highest concentrations of the methylbenzyl nitrate and nitro-xylene products were formed in the o-xylene reactions. As we previously observed for the formation of m-nitrotoluene from toluene [20], for a given experiment the amount Gery et al [29] This work Takagi et al [22] Gery et al [29] This work This work This work Takagi et al [22] Gery et al [29] Takagi et al [22] This work Takagi et al [22] This work Gery et al [29] Bandow and Washida [27] Gery et al [29] This work Gery et al [29] This work This work This work Gery et al [29] This work This work Gery et al (nitro-xylenes). The formation yields of these nitrate and nitro-products as given by least-squares analyses of the data shown in Figures 3 and 4 are given in Table IT! It should be noted that the amounts of 5, and especially, 4-nitro-m-xylene formed from m-xylene were low, with complete data sets not being obtained for most of the irradiations (Table 11), and hence the formation yields of these two nitro-m-xylenes have significant associated experimental uncertainties.…”

Quantifying the reactive uptake of OH by organic aerosols in a continuous flow stirred tank reactor

“…[OH] can be reached by reducing the UV lamp power, or decreasing the relative humidity inside 24 the reactor. Longer reaction times can be achieved by reducing the flow rate (F) or by using a larger volume CFSTR to obtain the desired oxidation conditions.…”

“…The CFSTR has been previously used to study aerosol formation [21][22][23] as well as gas phase reactions. 24,25 Fewer studies have applied CFSTR's to heterogeneous reactions on aerosol particles. 26,27 In these previous studies, the rate of a heterogeneous or homogeneous reaction inside a CFSTR was obtained by measuring the difference between the reactant concentrations entering and exiting the reaction volume divided by the residence time, once the CFSTR has reached steady state.…”

Simulated impact of NO x on SOA formation from oxidation of toluene and m -xylene

“…In this paper, the gas-phase chemistry schemes were constructed from previous experimental and theoretical studies of benzene, toluene and m-xylene systems (Gery et al, 1987;Atkinson et al, 1991;Andino et al, 1996;Klotz et al, 2002;Jenkin et al, 2003;Suh et al, 2003;Hu et al, 2007). Available experimental or theoretical rate constants and branching ratio information from literature were incorporated into CACM.…”