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Issue 41, 2015
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Global investigation of potential energy surfaces for the pyrolysis of C1–C3 hydrocarbons: toward the development of detailed kinetic models from first principles

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Abstract

Detailed kinetic models (DKMs) are the most fundamental “bottom-up” approaches to computational investigation of the pyrolysis and oxidation of fuels. The weakest points of existing DKMs are incomplete information about the reaction types that can be involved in the potential energy surfaces (PESs) in pyrolysis and oxidation processes. Also, the computational thermodynamic parameters available in the literature vary widely with the level of theory employed. More sophisticated models require improvement both in our knowledge of the type of the reactions involved and the consistency of thermodynamic and kinetic parameters. In this paper, we aim to address these issues by developing ab initio models that can be used to describe early stages of pyrolysis of C1–C3 hydrocarbons. We applied a recently developed global reaction route mapping (GRRM) strategy to systematically investigate the PES of the pyrolysis of C1–C3 hydrocarbons at a consistent level of theory. The reactions are classified into 14 reaction types. The critical points on the PES for all reactions in the network are calculated at the highly accurate UCCSD(T)-F12b/cc-pVTZ//UM06-2X/cc-pVTZ level of theory. The data reported in this paper can be used for first principle calculations of kinetic constants and for a subsequent study on modeling the evolution of the species from the reaction network of the pyrolysis and oxidation of C1–C3 hydrocarbons.

Graphical abstract: Global investigation of potential energy surfaces for the pyrolysis of C1–C3 hydrocarbons: toward the development of detailed kinetic models from first principles

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Publication details

The article was received on 23 Jul 2015, accepted on 14 Sep 2015 and first published on 24 Sep 2015


Article type: Paper
DOI: 10.1039/C5CP04329H
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Phys. Chem. Chem. Phys., 2015,17, 27789-27805

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    Global investigation of potential energy surfaces for the pyrolysis of C1–C3 hydrocarbons: toward the development of detailed kinetic models from first principles

    M. N. Ryazantsev, A. Jamal, S. Maeda and K. Morokuma, Phys. Chem. Chem. Phys., 2015, 17, 27789
    DOI: 10.1039/C5CP04329H

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