Title of Paper:Development of a skeletal oxidation mechanism for biodiesel surrogate

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Date of Publication:2015-01-01

Journal:PROCEEDINGS OF THE COMBUSTION INSTITUTE

Included Journals:SCIE、EI

Volume:35

Issue:3

Page Number:3037-3044

ISSN No.:1540-7489

Key Words:Biodiesel surrogate; Skeletal mechanism; Low-temperature combustion; Decoupling methodology

Abstract:A new skeletal surrogate model including methyl decenoate (MD), methyl 5-decenoate (MD5D), and n-decane was proposed. In the surrogate model, MD and MD5D were chosen to respectively represent the saturated methyl ester and unsaturated methyl ester in biodiesel, and n-decane was included to match the energy content and C/H/O ratio of actual biodiesel fuel. Based on a decoupling methodology, an oxidation mechanism for the biodiesel surrogate was constructed by integrating the skeletal large-molecule submechanisms for n-decane, MD and MD5D, a reduced C-2-C-3 mechanism, and a detailed H-2/CO/C-1 mechanism. The final mechanism for the biodiesel surrogate is composed of 60 species and 172 reactions. The mechanism was validated against experimental data, including ignition delay times in shock tubes and major species concentrations in jet-stirred reactors over wide operating conditions. Moreover, the mechanism was employed to simulate the combustion and emission characteristics of an engine operated in a low temperature combustion mode with SME as fuel. The overall agreement between the predictions and measurements is satisfactory. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.