Study on the reaction of 3-methyl-2-butenal and 3-methylbutanal with Cl atoms: kinetics and reaction mechanism

被引：3

作者：

Shi, Bo ^{[1
,4
]}

Wang, Weigang ^{[2
]}

Fan, Cici ^{[2
]}

Zhang, Yuchan ^{[1
]}

Sun, Zheng ^{[1
,3
]}

Zeng, Yanli ^{[1
,5
]}

Ge, Maofa ^{[2
]}

机构：

[1] Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Hebei, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Mol Sci BNLMS, Inst Chem, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China

[3] Lanfang Normal Univ, Langfang 065000, Peoples R China

[4] Hebei Normal Univ, Natl Demonstrat Ctr Expt Chem, Shijiazhuang 050024, Hebei, Peoples R China

[5] Key Lab Inorgan Nanomat Hebei Prov, Shijiazhuang 050024, Hebei, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2022年 / 116卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Smog chamber; Kinetic; Reaction mechanism; Cl atoms; GAS-PHASE REACTIONS; ORGANIC-COMPOUNDS; NITRYL CHLORIDE; CARBONYLS; PRODUCTS; URBAN; AIR; OH; PHOTOOXIDATION; CHEMISTRY;

D O I：

10.1016/j.jes.2021.03.032

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The reaction of Cl atoms with two C-5 aldehydes (3-methyl-2-butenal and 3-methylbutanal) were investigated by proton-transfer-reaction mass spectrum (PTR-MS) using smog chamber at 298 +/- 1 K and 760 Torr. A relative rate method was used to determine the rate constants of the title reactions with m-xylene and trans-2-butene as reference compounds: (3.04 +/- 0.18) x 10(-10) and (2.07 +/- 0.14) x 10(-10) cm(3)/(molecule.sec) for 3-methyl-2-butenal and 3-methylbutanal, respectively. Additionally, the gas-phase products were also identi-fied by PTR-MS, and the possible reaction mechanisms were proposed basing on the identi-fied products. The detected gas-phase products are similar for two C-5 aldehydes reactions, mainly including small molecules of aldehydes, ketones and chlorinated aldehyde com-pounds. The atmospheric lifetimes (tau) calculated for 3-methyl-2-butenal (tau = 7.0 hr, marine boundary layer (MBL)) and 3-methylbutanal (tau = 10.3 hr, MBL) according to the obtained rate constants. The results indicate that Cl atoms at MBL are competitive with OH radicals for the degradation contribution of C-5 aldehyde compounds. (C) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

引用

页码：25 / 33

页数：9

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