Reaction Mechanisms and Chemical Kinetics in Atmospheric Chemistry

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Air Quality".

Deadline for manuscript submissions: 25 October 2024 | Viewed by 1089

Special Issue Editor


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Guest Editor
Quantum Theory Project, Departments of Chemistry and Physics, University of Florida, Gainesville, FL 32611, USA
Interests: computational chemistry; quantum chemistry calculation; DFT; PES; master equation; 2DME; SCTST; RRKM; TST; dynamics for fundamental gas-phase reactions in atmosphere, space, and combustion

Special Issue Information

Dear Colleagues,

Many human activities (including burning fossil fuels, agricultural production, industrial manufacture, transport, etc.) have led to the release of a large number of chemical compounds into the atmosphere. These chemicals are polluting the living environments as well as causing global warming and climate change because they have altered the natural processes in the Earth’s atmosphere. To better understand the impacts of human activities on the environment, it is necessary to have knowledge of the sources and sinks of these chemical compounds. 

Chemistry in the atmosphere is rather complicated as hundreds or even thousands of coupled chemical reactions are constantly occurring in series and/or in parallel. One must carry out an atmospheric modeling simulation to resolve depletions, demonstrate the formations of key chemicals, and determine some key reactions that control the chemical process. To conduct such a modeling simulation, one must lay out the mechanisms in detail and the rate coefficients for elementary reactions. Traditionally, experimental techniques are usually used to obtain such (benchmark) information; however, there are certain limitations of these techniques including limited data availability and high costs. Therefore, high-level theoretical methods have emerged as an alternative choice. Theoretical results can be used to support, elucidate, and complement the experiments, as well as extrapolate results to conditions where there is a lack of experimental data.

In this Special Issue titled ‘Reaction Mechanisms and Chemical Kinetics in Atmospheric Chemistry’, we invite submissions in the following areas (this list is not exhaustive):

  • Experimental studies;
  • Theoretical (gas-phase kinetics and/or dynamics) calculations;
  • Field measurements and satellites for atmospheric measurements;
  • Atmospheric modeling;
  • Interface reactions.

Dr. Thanh Lam Nguyen
Guest Editor

Manuscript Submission Information

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Keywords

  • mechanisms
  • kinetics
  • master-equation
  • rate constants
  • DFT
  • coupled-cluster

Published Papers (1 paper)

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Research

11 pages, 1785 KiB  
Article
Experimental Study of the Reaction of OH Radicals with Carbonyl Sulfide between 365 and 960 K: Kinetics and Products
by Yuri Bedjanian
Atmosphere 2024, 15(5), 576; https://doi.org/10.3390/atmos15050576 - 8 May 2024
Viewed by 406
Abstract
Reaction OH + OCS → products (1) has been studied in a discharge–flow reactor combined with modulated molecular beam mass spectrometry. The reaction rate constant has been determined under pseudo-first-order conditions through monitoring OH decays in a high excess of OCS: k1 [...] Read more.
Reaction OH + OCS → products (1) has been studied in a discharge–flow reactor combined with modulated molecular beam mass spectrometry. The reaction rate constant has been determined under pseudo-first-order conditions through monitoring OH decays in a high excess of OCS: k1 = (2.35 ± 0.25) × 10−12 exp(−(2144 ± 56)/T) cm3 molecule−1 s−1 at T = 365–960 K (the uncertainties represent precision at the 2σ level, the total 2σ relative uncertainty including statistical and systematic errors on the rate constant being 20% at all temperatures). The rate constant of reaction (1) was found to be similar at a total helium pressure of 1, 2, and 8 torr at around 500 K. The SH radical was identified as the primary product of the reaction, and its yield was determined to be about 100% at T = 500 and 750 K. The kinetic and mechanistic data from the present study are compared to previous experimental and theoretical work. Full article
(This article belongs to the Special Issue Reaction Mechanisms and Chemical Kinetics in Atmospheric Chemistry)
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