2012
DOI: 10.1021/jp306963z
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Abstract: Reactions between dilute methane and nonenergetic hydroxyl radicals were carried out at 3.5 K. The temperature was kept low in order to characterize the stepwise reaction and prevent parasitic side reactions. The hydroxyl radicals originate from discharged H(2)O/He mixtures. The reactions were monitored in situ using a Fourier transform infrared spectrometer. The formation of CH(3) radicals was confirmed simultaneously with the formation of water ice. Subsequent recombination reactions lead to the formation of… Show more

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Cited by 9 publications
(8 citation statements)
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“…The study by Lamberts et al (2017) was done to provide reaction rates at cryogenic temperatures of the reaction between methane (CH 4 ) and OH as CH 4 has been observed in the H 2 Orich ice phase (Boogert et al 1997;Öberg et al 2008), and OH radicals are expected to be abundant in that phase (Cuppen & Herbst 2007;Ioppolo et al 2008;Cuppen et al 2010;Oba et al 2012;Lamberts et al 2013). These authors, as well as others (Wada et al 2006;Hodyss et al 2009;Weber et al 2009;Zins et al 2012;Bossa et al 2015), showed that CH 4 hydrogen abstraction by an OH radical results in the efficient formation of CH 3 radicals; a process that can be induced by tunneling (Lamberts et al 2017). Thus, these findings can be taken one step further by postulation that the OH-induced abstraction reaction of CH 4 may result in the formation of CH 3 OH by the sequential reaction chains: CH 4 + OH → CH 3 + H 2 O and CH 3 + OH → CH 3 OH.…”
Section: Introductionmentioning
confidence: 93%
“…The study by Lamberts et al (2017) was done to provide reaction rates at cryogenic temperatures of the reaction between methane (CH 4 ) and OH as CH 4 has been observed in the H 2 Orich ice phase (Boogert et al 1997;Öberg et al 2008), and OH radicals are expected to be abundant in that phase (Cuppen & Herbst 2007;Ioppolo et al 2008;Cuppen et al 2010;Oba et al 2012;Lamberts et al 2013). These authors, as well as others (Wada et al 2006;Hodyss et al 2009;Weber et al 2009;Zins et al 2012;Bossa et al 2015), showed that CH 4 hydrogen abstraction by an OH radical results in the efficient formation of CH 3 radicals; a process that can be induced by tunneling (Lamberts et al 2017). Thus, these findings can be taken one step further by postulation that the OH-induced abstraction reaction of CH 4 may result in the formation of CH 3 OH by the sequential reaction chains: CH 4 + OH → CH 3 + H 2 O and CH 3 + OH → CH 3 OH.…”
Section: Introductionmentioning
confidence: 93%
“…In 1982, Tielens and Hagen [084] introduced an extended gas-grain model in which water icethe dominant solid state species -is produced by sequential hydrogenation (i.e., H- mainly following CO+OH and CO+O [115][116][117][118][119][120][121][122][123][124][125]; iv) the formation of hydroxylamine NH 2 OH [126-129]; v) and very recently the ongoing hydrogenation of CO producing glycolaldehyde and ethylene glycol [130]. Other studies report the hydrogenation and oxidation/nitrogenation of various nitrogen oxides such as NO and NO 2 [131][132][133][134]; formation of OCS via interaction of CS 2 with oxygen atoms [135]; the reactivity between non-energetic hydroxyl (OH) radicals and methane (CH 4 ) [136]; the investigation of the reactions of H and D atoms with solid C 2 H 2 , C 2 H 4 , and C 2 H 6 [137]; the formation of ammonia (NH 3 ) [138][139][140][141], isocyanic acid (HNCO) [140,142], formic acid (HCOOH) [143], carbonic acid (H 2 CO 3 ) [144], ethanol (CH 3 CH 2 OH) [145]; and oxygen atom reactions with alkenes [146]. In this review, a number of proto-typical examples will be discussed in more detail to illustrate representative experiments and to discuss their astrochemical relevance.…”
Section: State-of-the-artmentioning
confidence: 99%
“…1, 2 Methane reacts directly with OH radical to produce H 2 O and CH 3 , and CH 3 is subsequently oxidized to produce CO and CO 2 through chain propagation steps. 3 In the troposphere, this reaction is the major process for the removal of methane, 4 a greenhouse gas with relatively high abundance. The process accounts for 90% ± 5% of the total sink of methane.…”
Section: Introductionmentioning
confidence: 99%