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Rate Constants for Reaction Between Hydroxyl Radical and Dimethyl Sulfide Under Real Atmospheric Condition
Ting-ting Wang,Chang-jiang Hu,Yu-jing Mu?,Yu-jie Zhang
Author NameAffiliationE-mail
Ting-ting Wang Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China  
Chang-jiang Hu Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China  
Yu-jing Mu? Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China yjmu@rcees.ac.cn 
Yu-jie Zhang Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China  
Abstract:
The rate constants of the reaction between hydroxyl radical (OH?) and dimethyl sulfide (DMS) were in-vestigated by using the relative methods in air, N2, and O2. Strong influences of ground state oxygenO(3P) on DMS consumption were found by the photolysis of HONO and CH3ONO as OH?sources, and the rate constants obtained in these systems varied significantly. The rate constants of the reaction between DMS and OH?(generated by photolysis of H2O2) at room temperature were 8.56×10-12, 11.31×10-12, and 4.50×10-12cm3/(molecule?s), in air, O2, and N2, respectively. The temperature dependence of the rateconstants for OH? with DMS over the temperature range of 287-338 K was also investigated in nitrogen and air, and the Arrhenius expression was obtained as follows: kair=(7.24±0.28)×10-13exp[(770.7±97.2)/T],kN2=(3.40±0.15)×10-11exp[-(590.3±165.9)/T].
Key words:  Dimethyl sulfide, Hydroxyl radical, Ground state oxygen, Kinetics
FundProject:
Rate Constants for Reaction Between Hydroxyl Radical and Dimethyl Sulfide Under Real Atmospheric Condition
汪海涛,胡长江,牟玉静 *,张玉洁
摘要:
用相对速率方法分别考察了OH自由基与DMS在氮气、空气和氧气体系的反应速率常数. 发现使用HONO和CH3ONO作为OH自由基发生剂时,基态氧原子O(3P)对动力学的测定有很大的影响. H2O2为OH自由基的发生剂,室温下在氮气、空气及氧气体系下的速率常数分别为4.50×10-12,8.56×10-12和11.31×10-12 cm3/(molecule?s).在287~338 K,测得氮气和空气体系下的阿累尼乌斯表达式分别为:kair=(7.24±0.28)×10-13exp[(770.7±97.2)/T],kN2=(3.40±0.15)×10-11exp[-(590.3±165.9)/T
关键词:  二甲硫醚,氢氧自由基,基态氧原子,动力学
DOI:10.1088/1674-0068/21/05/407-414
分类号: