{"title":"Heterogeneous Reaction of Dimethyl Sulfide with a Chlorine Atom","authors":"I. K. Larin, G. B. Pronchev, E. M. Trofimova","doi":"10.1134/s1990793124700209","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The reaction rate constant of a chlorine atom with dimethyl sulfide (DMS) is measured in the temperature range 308–366 K by the method of resonant fluorescence (RF) of chlorine atoms. It is shown that the reaction rate constant decreases during experiments at a higher temperature. At a temperature of 308 K, the rate constant of this reaction is measured at different ratios of the reaction time and the diffusion time of chlorine atoms to the reactor wall. The data of these experiments show that with an increase in the diffusion time of the active centers to the surface of the reactor, compared with the contact time of the reagents, a decrease in the measured reaction rate constant is observed. This allows us to assert that the reaction is heterogeneous and the interaction of the chlorine atom with the DMS occurs on the surface of the reactor.</p>","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry B","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1134/s1990793124700209","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The reaction rate constant of a chlorine atom with dimethyl sulfide (DMS) is measured in the temperature range 308–366 K by the method of resonant fluorescence (RF) of chlorine atoms. It is shown that the reaction rate constant decreases during experiments at a higher temperature. At a temperature of 308 K, the rate constant of this reaction is measured at different ratios of the reaction time and the diffusion time of chlorine atoms to the reactor wall. The data of these experiments show that with an increase in the diffusion time of the active centers to the surface of the reactor, compared with the contact time of the reagents, a decrease in the measured reaction rate constant is observed. This allows us to assert that the reaction is heterogeneous and the interaction of the chlorine atom with the DMS occurs on the surface of the reactor.
摘要 通过氯原子的共振荧光（RF）方法，测量了氯原子与二甲基硫醚（DMS）在 308-366 K 温度范围内的反应速率常数。实验表明，温度越高，反应速率常数越小。在 308 K 的温度下，按反应时间和氯原子向反应器壁扩散时间的不同比率测量了该反应的速率常数。这些实验数据表明，与试剂的接触时间相比，随着活性中心向反应器表面扩散的时间增加，测得的反应速率常数也随之降低。由此我们可以断定，反应是异质的，氯原子与二甲基亚砜的相互作用发生在反应器的表面。
期刊介绍：
Russian Journal of Physical Chemistry B: Focus on Physics is a journal that publishes studies in the following areas: elementary physical and chemical processes; structure of chemical compounds, reactivity, effect of external field and environment on chemical transformations; molecular dynamics and molecular organization; dynamics and kinetics of photoand radiation-induced processes; mechanism of chemical reactions in gas and condensed phases and at interfaces; chain and thermal processes of ignition, combustion and detonation in gases, two-phase and condensed systems; shock waves; new physical methods of examining chemical reactions; and biological processes in chemical physics.
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