Determination of laminar burning characteristics of a surrogate for a pyrolysis fuel using constant volume method

Cangsu Xu; Hanyu Wang; Francis Oppong; Xiaolu Li; Kangquan Zhou; Wenhua Zhou; Siyuan Wu; Chongming Wang

doi:10.1016/j.energy.2019.116315

Determination of laminar burning characteristics of a surrogate for a pyrolysis fuel using constant volume method

Cangsu Xu, Hanyu Wang, Francis Oppong, Xiaolu Li, Kangquan Zhou, Wenhua Zhou, Siyuan Wu, Chongming Wang

Research output: Contribution to journal › Article › peer-review

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Abstract

A fast pyrolysis biofuel, mainly consisting to 98% of ethanol, ethyl acetate, diethyl ether, acetone and 2-butanone with mass ratios of 9:6:2:1:1, was catalytically produced from rice husk. A preliminary engine test demonstrated this biofuel has the possibility of being a gasoline blending stock. However, its fundamental burning features are not fully understood. This work presents the experimental investigations of the spherical propagating flame of a surrogate fuel representing the biofuel in a constant volume combustion chamber (CVCC). Tests were conducted at initial pressures of 0.1–0.4 MPa, initial temperatures of 358–418 K, and equivalence ratios of 0.7–1.4. Employing the constant volume method (CVM) allows determining laminar burning speeds (S_u) of this surrogate at conditions far beyond the initial conditions (0.1–0.8 MPa, 358–490 K). Power law fitting correlations between S_u and pressure were obtained via the constant volume method (CVM). Cellularity appears when pressure or temperature is high, and cellular burning speed was calculated by CVM as well. S_u determined via the constant pressure method (CPM) were compared with those from the CVM. Discrepancies between the results from the CVM and the CPM are within 15%, except at the conditions where flame cellularity appeared. Additionally, an explicit correlation of S_u was obtained from the experimental results.

Original language	English
Article number	116315
Journal	Energy
Volume	190
Early online date	11 Oct 2019
DOIs	https://doi.org/10.1016/j.energy.2019.116315
Publication status	Published - 1 Jan 2020

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy, 190, (2020)] DOI: 10.1016/j.energy.2019.116315

© 22007, Elsevier. Licensed under the Creative Commons Attribution-NonCommercialNoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Funder

National Natural Science Foundation of China (NO. 91741203 and 51336008 ), the Public Beneficial Technology Application Research Project of Science Technology Department of Zhejiang Province (NO. 2016C31102 and 2016C31112 ), the Fundamental Research Funds for the Central Universities of China (NO. 2013QNA4017 ), and the Hangzhou Science Committee (NO. 20162013A06 ) of China.

Keywords

Biofuel
Cellular flame speed
Constant-volume method
Laminar burning speed

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Pollution
Mechanical Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

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10.1016/j.energy.2019.116315

Post-PrintAccepted author manuscript, 1.14 MBLicence: CC BY-NC-ND

Cite this

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title = "Determination of laminar burning characteristics of a surrogate for a pyrolysis fuel using constant volume method",

abstract = "A fast pyrolysis biofuel, mainly consisting to 98% of ethanol, ethyl acetate, diethyl ether, acetone and 2-butanone with mass ratios of 9:6:2:1:1, was catalytically produced from rice husk. A preliminary engine test demonstrated this biofuel has the possibility of being a gasoline blending stock. However, its fundamental burning features are not fully understood. This work presents the experimental investigations of the spherical propagating flame of a surrogate fuel representing the biofuel in a constant volume combustion chamber (CVCC). Tests were conducted at initial pressures of 0.1–0.4 MPa, initial temperatures of 358–418 K, and equivalence ratios of 0.7–1.4. Employing the constant volume method (CVM) allows determining laminar burning speeds (Su) of this surrogate at conditions far beyond the initial conditions (0.1–0.8 MPa, 358–490 K). Power law fitting correlations between Su and pressure were obtained via the constant volume method (CVM). Cellularity appears when pressure or temperature is high, and cellular burning speed was calculated by CVM as well. Su determined via the constant pressure method (CPM) were compared with those from the CVM. Discrepancies between the results from the CVM and the CPM are within 15%, except at the conditions where flame cellularity appeared. Additionally, an explicit correlation of Su was obtained from the experimental results.",

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note = "NOTICE: this is the author{\textquoteright}s version of a work that was accepted for publication in Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy, 190, (2020)] DOI: 10.1016/j.energy.2019.116315 {\textcopyright} 22007, Elsevier. Licensed under the Creative Commons Attribution-NonCommercialNoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ ",

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AU - Xu, Cangsu

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AU - Li, Xiaolu

AU - Zhou, Kangquan

AU - Zhou, Wenhua

AU - Wu, Siyuan

AU - Wang, Chongming

N1 - NOTICE: this is the author’s version of a work that was accepted for publication in Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy, 190, (2020)] DOI: 10.1016/j.energy.2019.116315 © 22007, Elsevier. Licensed under the Creative Commons Attribution-NonCommercialNoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

PY - 2020/1/1

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N2 - A fast pyrolysis biofuel, mainly consisting to 98% of ethanol, ethyl acetate, diethyl ether, acetone and 2-butanone with mass ratios of 9:6:2:1:1, was catalytically produced from rice husk. A preliminary engine test demonstrated this biofuel has the possibility of being a gasoline blending stock. However, its fundamental burning features are not fully understood. This work presents the experimental investigations of the spherical propagating flame of a surrogate fuel representing the biofuel in a constant volume combustion chamber (CVCC). Tests were conducted at initial pressures of 0.1–0.4 MPa, initial temperatures of 358–418 K, and equivalence ratios of 0.7–1.4. Employing the constant volume method (CVM) allows determining laminar burning speeds (Su) of this surrogate at conditions far beyond the initial conditions (0.1–0.8 MPa, 358–490 K). Power law fitting correlations between Su and pressure were obtained via the constant volume method (CVM). Cellularity appears when pressure or temperature is high, and cellular burning speed was calculated by CVM as well. Su determined via the constant pressure method (CPM) were compared with those from the CVM. Discrepancies between the results from the CVM and the CPM are within 15%, except at the conditions where flame cellularity appeared. Additionally, an explicit correlation of Su was obtained from the experimental results.

AB - A fast pyrolysis biofuel, mainly consisting to 98% of ethanol, ethyl acetate, diethyl ether, acetone and 2-butanone with mass ratios of 9:6:2:1:1, was catalytically produced from rice husk. A preliminary engine test demonstrated this biofuel has the possibility of being a gasoline blending stock. However, its fundamental burning features are not fully understood. This work presents the experimental investigations of the spherical propagating flame of a surrogate fuel representing the biofuel in a constant volume combustion chamber (CVCC). Tests were conducted at initial pressures of 0.1–0.4 MPa, initial temperatures of 358–418 K, and equivalence ratios of 0.7–1.4. Employing the constant volume method (CVM) allows determining laminar burning speeds (Su) of this surrogate at conditions far beyond the initial conditions (0.1–0.8 MPa, 358–490 K). Power law fitting correlations between Su and pressure were obtained via the constant volume method (CVM). Cellularity appears when pressure or temperature is high, and cellular burning speed was calculated by CVM as well. Su determined via the constant pressure method (CPM) were compared with those from the CVM. Discrepancies between the results from the CVM and the CPM are within 15%, except at the conditions where flame cellularity appeared. Additionally, an explicit correlation of Su was obtained from the experimental results.

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KW - Cellular flame speed

KW - Constant-volume method

KW - Laminar burning speed

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JO - Energy

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M1 - 116315

ER -

Determination of laminar burning characteristics of a surrogate for a pyrolysis fuel using constant volume method

Abstract

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