UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Reactive and electron force field molecular dynamics simulations of electric field assisted ethanol oxidation reactions

Jiang, XZ; Luo, KH; (2020) Reactive and electron force field molecular dynamics simulations of electric field assisted ethanol oxidation reactions. Proceedings of the Combustion Institute 10.1016/j.proci.2020.06.318. (In press). Green open access

[img]
Preview
Text
1-s2.0-S1540748920304119-main.pdf - Published version

Download (1MB) | Preview

Abstract

In this research, a combination of reactive force field (ReaxFF) and electron force field (eFF) molecular dynamics (MD) simulations is constructed to reveal the fundamental mechanisms for the influence of the electric field on ethanol oxidation reactions at atomic and subatomic scales. In total, 21 ReaxFF MD simulations and 35 eFF MD simulations have been conducted. ReaxFF MD results indicate that the ethanol oxidation reaction is a two-stage process where the electric field plays varied roles in each stage. The first stage features the decomposition of ethanol molecules, in which the electric field influences the decomposition reaction rate by changing the kinetic energy of carbon-containing molecules/radicals on the order of 100–1000 kJ/mol and altering the molecular conformation and thereby the bond dissociation energy. At the second stage where oxygen molecules participate in the reaction, the electric field affects reactions by modifying the reaction pathways. The application of the eFF MD simulations, for the first time, extends our understanding of the electric field effects on ethanol oxidation reaction to subatomic scales. The results indicate that the electric field modifies the electron energy on the order of 10–100 kJ/mol. The present study also offers interpretation of previous findings on electric field effects on reaction pathways and fluorescence experimental observations, and provides support for both “ionic wind” and chemistry-driven hypotheses. This research provides unprecedented insight into reactions aided by the electric field, which potentially can facilitate the design of realistic field-assisted combustion systems.

Type: Article
Title: Reactive and electron force field molecular dynamics simulations of electric field assisted ethanol oxidation reactions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.proci.2020.06.318
Publisher version: https://doi.org/10.1016/j.proci.2020.06.318
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Keywords: Ethanol oxidation, Electric field, Molecular dynamics, Reactive force field, Electron force field
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10110258
Downloads since deposit
15Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item