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A workflow for automatic generation and efficient refinement of individual pressure-dependent networks

Journal Article · · Combustion and Flame
 [1];  [2];  [3]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Massachusetts Institute of Technology (MIT)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Technion-Israel Institute of Technology, Haifa (Israel)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Manual chemical kinetic model construction often requires modelists to at least implicitly guess all possible decay pathways and their relative fluxes for all important species. We present a workflow and associated tool for automatic generation and re finement of pressure-dependent networks that should enable modelists to efficiently and comprehensively identify decay pathways and estimate respective parameters for chemical species. This tool combines the capabilities of the Reaction Mechanism Generator (RMG) software to generate possible reaction paths, determine thermochemistry, approximate rate coefficients and estimate frequencies with the capabilities of the Arkane software to use quantum chemical parameters to compute thermochemistry and pressure dependent rates. A flux-based algorithm is used to decide which isomers to add to the network. Isomers added to the network are reacted to form other channels. When enough of the flux is accounted for by the isomers and bimolecular product channels, the generation process terminates to yield a comprehensive network. Network sensitivity analysis is applied to the network to identify the most important wells and barriers that can be refined using quantum chemistry calculations. Iterative refinement can then be used to achieve accuracy. The comprehensive network can be easily reduced using energy and flux-based algorithms to the most important channels and isomers in the network.
Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
SC0014901
OSTI ID:
1899711
Journal Information:
Combustion and Flame, Journal Name: Combustion and Flame Vol. 257; ISSN 0010-2180
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (34)

AutoMeKin2021 : An open‐source program for automated reaction discovery journal August 2021
Multiple-Well, multiple-path unimolecular reaction systems. I. MultiWell computer program suite journal January 2001
“Third‐body” collision parameters for hydrocarbons, alcohols, and hydroperoxides and an effective internal rotor approach for estimating them journal April 2020
Exploring paths of chemical transformations in molecular and periodic systems: An approach utilizing force journal May 2021
High-pressure oxidation of methane journal October 2016
Reaction Mechanism Generator: Automatic construction of chemical kinetic mechanisms journal June 2016
KinBot: Automated stationary point search on potential energy surfaces journal March 2020
The reaction of hydroxyethyl radicals with O2: A theoretical analysis and experimental product study journal January 2009
Adventures on the C3H5O potential energy surface: OH + propyne, OH + allene and related reactions journal January 2015
Temperature- and pressure-dependent rate coefficients for the HACA pathways from benzene to naphthalene journal January 2017
Reaction Mechanism Generator v3.0: Advances in Automatic Mechanism Generation journal May 2021
RMG Database for Chemical Property Prediction journal October 2022
Temperature and Pressure-Dependent Rate Coefficients for the Reaction of Vinyl Radical with Molecular Oxygen journal February 2015
Parameterization Strategies for Intermolecular Potentials for Predicting Trajectory-Based Collision Parameters journal March 2019
The path of chemical reactions - the IRC approach journal December 1981
Hydrogen Atom Bond Increments for Calculation of Thermodynamic Properties of Hydrocarbon Radical Species journal September 1995
Unimolecular rate theory test in thermal reactions journal February 1972
The Kinetics of the Recombination of Methyl Radicals and Iodine Atoms. journal June 1951
Temperature and Molecular Size Dependence of the High-Pressure Limit journal July 2003
Pressure-Dependent OH Yields in Alkene + HO 2 Reactions: A Theoretical Study journal September 2011
High-Pressure Rate Rules for Alkyl + O 2 Reactions. 1. The Dissociation, Concerted Elimination, and Isomerization Channels of the Alkyl Peroxy Radical journal November 2011
Role of O 2 + QOOH in Low-Temperature Ignition of Propane. 1. Temperature and Pressure Dependent Rate Coefficients journal March 2012
Database of Small Molecule Thermochemistry for Combustion journal August 2012
MESMER: An Open-Source Master Equation Solver for Multi-Energy Well Reactions journal September 2012
Reformulation and Solution of the Master Equation for Multiple-Well Chemical Reactions journal May 2013
Simultaneously improving reaction coverage and computational cost in automated reaction prediction tasks journal July 2021
Automatic estimation of pressure-dependent rate coefficients journal January 2012
Predicting third-body collision efficiencies for water and other polyatomic baths journal January 2022
Examining the accuracy of methods for obtaining pressure dependent rate coefficients journal January 2022
Steady-state master equation methods journal January 2007
Formally direct pathways and low-temperature chain branching in hydrocarbon autoignition: the cyclohexyl + O2 reaction at high pressure journal January 2009
Additivity Rules for the Estimation of Molecular Properties. Thermodynamic Properties journal September 1958
A complete basis set model chemistry. VII. Use of the minimum population localization method journal April 2000
Kinetic Analysis of Complex Chemical Activation and Unimolecular Dissociation Reactions using QRRK Theory and the Modified Strong Collision Approximation journal January 2000