The deconvolution of the thermal, dilution, and chemical effects of exhaust gas recirculation (EGR) on the reactivity of engine and flame soot

Khalid Al-Qurashi; Angela D. Lueking; André L. Boehman

doi:10.1016/j.combustflame.2011.02.006

The deconvolution of the thermal, dilution, and chemical effects of exhaust gas recirculation (EGR) on the reactivity of engine and flame soot

Khalid Al-Qurashi, Angela D. Lueking, André L. Boehman^*

^*Corresponding author for this work

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

96 Scopus citations

Abstract

In a recent paper, we demonstrated that the exhaust gas recirculation (EGR) enhanced the oxidative reactivity of diesel engine soot. In this paper, we show that simulated EGR, via carbon dioxide (CO₂) addition to the intake air to an engine at concentrations of 0, 2, 4, and 8 vol.% and to the oxidizer stream of an ethylene diffusion flame at concentrations of 0, 5, and 10vol.%, affects the reactivity of the soot in the same manner as actual EGR. Motivated by this fact, post-flame ethylene soot was produced from a co-flow laminar diffusion flame to better understand the mechanism by which the CO₂ affects soot reactivity. This objective was accomplished by successfully isolating and examining the thermal, dilution, and chemical effects of the CO₂ on soot reactivity. These three effects account for 45%, 35%, and 20% of the total reactivity of soot respectively, with the thermal effect being the most important factor governing the soot reactivity. The results showed that all of these effects account for a measurable increase in soot reactivity.

Original language	English (US)
Pages (from-to)	1696-1704
Number of pages	9
Journal	Combustion and Flame
Volume	158
Issue number	9
DOIs	https://doi.org/10.1016/j.combustflame.2011.02.006
State	Published - Sep 2011

Bibliographical note

Funding Information:
The authors wish to thank the Department of Energy for support under Grant # DE-FC26-03NT41828, the National Science Foundation for support under Grant # CTS-0553339 and the Saudi Ministry of Higher Education for fellowship support for Dr. Al-Qurashi. Thanks are also due to Dr. Allen Kimel in the Penn State Department of Materials Science and Engineering for access to the SDT instrument and to Professor Robert Santoro for providing the co-flow laminar diffusion flame burner used in this study.

Keywords

Diesel particulate
Exhaust gas recirculation
Nanostructure
Reactivity
Soot oxidation

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology
General Physics and Astronomy

Access to Document

10.1016/j.combustflame.2011.02.006

Cite this

@article{de2eb50ef2f44ea786106c19d14d51f7,

title = "The deconvolution of the thermal, dilution, and chemical effects of exhaust gas recirculation (EGR) on the reactivity of engine and flame soot",

abstract = "In a recent paper, we demonstrated that the exhaust gas recirculation (EGR) enhanced the oxidative reactivity of diesel engine soot. In this paper, we show that simulated EGR, via carbon dioxide (CO2) addition to the intake air to an engine at concentrations of 0, 2, 4, and 8 vol.% and to the oxidizer stream of an ethylene diffusion flame at concentrations of 0, 5, and 10vol.%, affects the reactivity of the soot in the same manner as actual EGR. Motivated by this fact, post-flame ethylene soot was produced from a co-flow laminar diffusion flame to better understand the mechanism by which the CO2 affects soot reactivity. This objective was accomplished by successfully isolating and examining the thermal, dilution, and chemical effects of the CO2 on soot reactivity. These three effects account for 45%, 35%, and 20% of the total reactivity of soot respectively, with the thermal effect being the most important factor governing the soot reactivity. The results showed that all of these effects account for a measurable increase in soot reactivity.",

keywords = "Diesel particulate, Exhaust gas recirculation, Nanostructure, Reactivity, Soot oxidation",

author = "Khalid Al-Qurashi and Lueking, {Angela D.} and Boehman, {Andr{\'e} L.}",

note = "Funding Information: The authors wish to thank the Department of Energy for support under Grant # DE-FC26-03NT41828, the National Science Foundation for support under Grant # CTS-0553339 and the Saudi Ministry of Higher Education for fellowship support for Dr. Al-Qurashi. Thanks are also due to Dr. Allen Kimel in the Penn State Department of Materials Science and Engineering for access to the SDT instrument and to Professor Robert Santoro for providing the co-flow laminar diffusion flame burner used in this study. ",

year = "2011",

month = sep,

doi = "10.1016/j.combustflame.2011.02.006",

language = "English (US)",

volume = "158",

pages = "1696--1704",

journal = "Combustion and Flame",

issn = "0010-2180",

publisher = "Elsevier",

number = "9",

}

TY - JOUR

T1 - The deconvolution of the thermal, dilution, and chemical effects of exhaust gas recirculation (EGR) on the reactivity of engine and flame soot

AU - Al-Qurashi, Khalid

AU - Lueking, Angela D.

AU - Boehman, André L.

N1 - Funding Information: The authors wish to thank the Department of Energy for support under Grant # DE-FC26-03NT41828, the National Science Foundation for support under Grant # CTS-0553339 and the Saudi Ministry of Higher Education for fellowship support for Dr. Al-Qurashi. Thanks are also due to Dr. Allen Kimel in the Penn State Department of Materials Science and Engineering for access to the SDT instrument and to Professor Robert Santoro for providing the co-flow laminar diffusion flame burner used in this study.

PY - 2011/9

Y1 - 2011/9

N2 - In a recent paper, we demonstrated that the exhaust gas recirculation (EGR) enhanced the oxidative reactivity of diesel engine soot. In this paper, we show that simulated EGR, via carbon dioxide (CO2) addition to the intake air to an engine at concentrations of 0, 2, 4, and 8 vol.% and to the oxidizer stream of an ethylene diffusion flame at concentrations of 0, 5, and 10vol.%, affects the reactivity of the soot in the same manner as actual EGR. Motivated by this fact, post-flame ethylene soot was produced from a co-flow laminar diffusion flame to better understand the mechanism by which the CO2 affects soot reactivity. This objective was accomplished by successfully isolating and examining the thermal, dilution, and chemical effects of the CO2 on soot reactivity. These three effects account for 45%, 35%, and 20% of the total reactivity of soot respectively, with the thermal effect being the most important factor governing the soot reactivity. The results showed that all of these effects account for a measurable increase in soot reactivity.

AB - In a recent paper, we demonstrated that the exhaust gas recirculation (EGR) enhanced the oxidative reactivity of diesel engine soot. In this paper, we show that simulated EGR, via carbon dioxide (CO2) addition to the intake air to an engine at concentrations of 0, 2, 4, and 8 vol.% and to the oxidizer stream of an ethylene diffusion flame at concentrations of 0, 5, and 10vol.%, affects the reactivity of the soot in the same manner as actual EGR. Motivated by this fact, post-flame ethylene soot was produced from a co-flow laminar diffusion flame to better understand the mechanism by which the CO2 affects soot reactivity. This objective was accomplished by successfully isolating and examining the thermal, dilution, and chemical effects of the CO2 on soot reactivity. These three effects account for 45%, 35%, and 20% of the total reactivity of soot respectively, with the thermal effect being the most important factor governing the soot reactivity. The results showed that all of these effects account for a measurable increase in soot reactivity.

KW - Diesel particulate

KW - Exhaust gas recirculation

KW - Nanostructure

KW - Reactivity

KW - Soot oxidation

UR - http://www.scopus.com/inward/record.url?scp=79960436489&partnerID=8YFLogxK

U2 - 10.1016/j.combustflame.2011.02.006

DO - 10.1016/j.combustflame.2011.02.006

M3 - Article

AN - SCOPUS:79960436489

SN - 0010-2180

VL - 158

SP - 1696

EP - 1704

JO - Combustion and Flame

JF - Combustion and Flame

IS - 9

ER -

The deconvolution of the thermal, dilution, and chemical effects of exhaust gas recirculation (EGR) on the reactivity of engine and flame soot

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this