Analysis of methane, propane, and syngas oxy-flames in a fuel-flex gas turbine combustor for carbon capture

MD Azazul Haque; Medhat A. Nemitallah; Ahmed Abdelhafez; Esmail M.A. Mokheimer; Mohamed A. Habib

doi:10.1002/er.7745

Analysis of methane, propane, and syngas oxy-flames in a fuel-flex gas turbine combustor for carbon capture

MD Azazul Haque, Medhat A. Nemitallah^*, Ahmed Abdelhafez, Esmail M.A. Mokheimer, Mohamed A. Habib

^*Corresponding author for this work

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

4 Scopus citations

Abstract

Premixed oxy-combustion flames of methane, syngas (CH₄:CO:H₂ with the molar ratio of 2:1:1), and propane in CO₂-diluted environment (for carbon capture) are examined in a swirl-stabilized combustor using large eddy simulations (LES) in three-dimensional (3-D) domain. The flame and emission characteristics are examined for the different fuels over a range of equivalence ratios (Φ: 0.34, 0.39, and 0.42), at 60% oxygen fraction (OF), and 2.5 m/s bulk inlet velocity under atmospheric conditions. The results indicate increments in several characteristic parameters that are of special importance for gas turbine combustion applications, including adiabatic flame temperature (T_ad), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and CO emission, with the increase of Φ whatever the type of fuel. Alternatively, flame thickness (δ) decreases with the increase in Φ for the three fuels. Characteristic “V” shape with almost identical outer recirculation zone (ORZ) is also observed for the three fuels. Among the studied fuels, oxy-methane flames demonstrate highest flame thicknesses, least uniform temperature distribution (highest pattern factor) at combustor outlet, and lowest CO emission level. Oxy-syngas flames show more uniform temperature distribution (lowest pattern factor) at combustor outlet and highest CO emission as compared with the oxy-methane and oxy-propane flames. The oxy-propane flames have higher values of T_ad, LFS, PD, PFR, Da, and thermal power (TP) along with lowest flame thickness compared with methane and syngas counterparts. Highlights: Increasing equivalence ratio improves the flame characteristics but increases CO emission. Fuel type has insignificant effects on shape/size of the outer recirculation zone (ORZ). Oxy-methane flames showed highest flame thicknesses and pattern factor and lowest CO. Oxy-syngas flames demonstrate highest CO emission and lowest pattern factor. Oxy-propane flames demonstrate higher values of temperature (T_ad), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and thermal power (TP).

Original language	English
Pages (from-to)	8657-8675
Number of pages	19
Journal	International Journal of Energy Research
Volume	46
Issue number	7
DOIs	https://doi.org/10.1002/er.7745
State	Published - 10 Jun 2022

Bibliographical note

Publisher Copyright:
© 2022 John Wiley & Sons Ltd.

Keywords

carbon capture
fuel flexibility
gas turbine
large eddy simulations (LES)
syngas combustion
turbulent reacting flow

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Fuel Technology
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/er.7745

High Impact Paper Award 2023
Nemitallah, M. (Recipient), Abdelhafez, A. (Recipient), Mokheimer, E. M. A. (Recipient) & Habib, M. (Recipient), 2023
Prize

Cite this

@article{76c0da58f99a41e788f7de46af62adb3,

title = "Analysis of methane, propane, and syngas oxy-flames in a fuel-flex gas turbine combustor for carbon capture",

abstract = "Premixed oxy-combustion flames of methane, syngas (CH4:CO:H2 with the molar ratio of 2:1:1), and propane in CO2-diluted environment (for carbon capture) are examined in a swirl-stabilized combustor using large eddy simulations (LES) in three-dimensional (3-D) domain. The flame and emission characteristics are examined for the different fuels over a range of equivalence ratios (Φ: 0.34, 0.39, and 0.42), at 60% oxygen fraction (OF), and 2.5 m/s bulk inlet velocity under atmospheric conditions. The results indicate increments in several characteristic parameters that are of special importance for gas turbine combustion applications, including adiabatic flame temperature (Tad), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damk{\"o}hler number (Da), and CO emission, with the increase of Φ whatever the type of fuel. Alternatively, flame thickness (δ) decreases with the increase in Φ for the three fuels. Characteristic “V” shape with almost identical outer recirculation zone (ORZ) is also observed for the three fuels. Among the studied fuels, oxy-methane flames demonstrate highest flame thicknesses, least uniform temperature distribution (highest pattern factor) at combustor outlet, and lowest CO emission level. Oxy-syngas flames show more uniform temperature distribution (lowest pattern factor) at combustor outlet and highest CO emission as compared with the oxy-methane and oxy-propane flames. The oxy-propane flames have higher values of Tad, LFS, PD, PFR, Da, and thermal power (TP) along with lowest flame thickness compared with methane and syngas counterparts. Highlights: Increasing equivalence ratio improves the flame characteristics but increases CO emission. Fuel type has insignificant effects on shape/size of the outer recirculation zone (ORZ). Oxy-methane flames showed highest flame thicknesses and pattern factor and lowest CO. Oxy-syngas flames demonstrate highest CO emission and lowest pattern factor. Oxy-propane flames demonstrate higher values of temperature (Tad), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damk{\"o}hler number (Da), and thermal power (TP).",

keywords = "carbon capture, fuel flexibility, gas turbine, large eddy simulations (LES), syngas combustion, turbulent reacting flow",

author = "Haque, {MD Azazul} and Nemitallah, {Medhat A.} and Ahmed Abdelhafez and Mokheimer, {Esmail M.A.} and Habib, {Mohamed A.}",

note = "Publisher Copyright: {\textcopyright} 2022 John Wiley & Sons Ltd.",

year = "2022",

month = jun,

day = "10",

doi = "10.1002/er.7745",

language = "English",

volume = "46",

pages = "8657--8675",

journal = "International Journal of Energy Research",

issn = "0363-907X",

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T1 - Analysis of methane, propane, and syngas oxy-flames in a fuel-flex gas turbine combustor for carbon capture

AU - Haque, MD Azazul

AU - Nemitallah, Medhat A.

AU - Abdelhafez, Ahmed

AU - Mokheimer, Esmail M.A.

AU - Habib, Mohamed A.

PY - 2022/6/10

Y1 - 2022/6/10

N2 - Premixed oxy-combustion flames of methane, syngas (CH4:CO:H2 with the molar ratio of 2:1:1), and propane in CO2-diluted environment (for carbon capture) are examined in a swirl-stabilized combustor using large eddy simulations (LES) in three-dimensional (3-D) domain. The flame and emission characteristics are examined for the different fuels over a range of equivalence ratios (Φ: 0.34, 0.39, and 0.42), at 60% oxygen fraction (OF), and 2.5 m/s bulk inlet velocity under atmospheric conditions. The results indicate increments in several characteristic parameters that are of special importance for gas turbine combustion applications, including adiabatic flame temperature (Tad), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and CO emission, with the increase of Φ whatever the type of fuel. Alternatively, flame thickness (δ) decreases with the increase in Φ for the three fuels. Characteristic “V” shape with almost identical outer recirculation zone (ORZ) is also observed for the three fuels. Among the studied fuels, oxy-methane flames demonstrate highest flame thicknesses, least uniform temperature distribution (highest pattern factor) at combustor outlet, and lowest CO emission level. Oxy-syngas flames show more uniform temperature distribution (lowest pattern factor) at combustor outlet and highest CO emission as compared with the oxy-methane and oxy-propane flames. The oxy-propane flames have higher values of Tad, LFS, PD, PFR, Da, and thermal power (TP) along with lowest flame thickness compared with methane and syngas counterparts. Highlights: Increasing equivalence ratio improves the flame characteristics but increases CO emission. Fuel type has insignificant effects on shape/size of the outer recirculation zone (ORZ). Oxy-methane flames showed highest flame thicknesses and pattern factor and lowest CO. Oxy-syngas flames demonstrate highest CO emission and lowest pattern factor. Oxy-propane flames demonstrate higher values of temperature (Tad), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and thermal power (TP).

AB - Premixed oxy-combustion flames of methane, syngas (CH4:CO:H2 with the molar ratio of 2:1:1), and propane in CO2-diluted environment (for carbon capture) are examined in a swirl-stabilized combustor using large eddy simulations (LES) in three-dimensional (3-D) domain. The flame and emission characteristics are examined for the different fuels over a range of equivalence ratios (Φ: 0.34, 0.39, and 0.42), at 60% oxygen fraction (OF), and 2.5 m/s bulk inlet velocity under atmospheric conditions. The results indicate increments in several characteristic parameters that are of special importance for gas turbine combustion applications, including adiabatic flame temperature (Tad), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and CO emission, with the increase of Φ whatever the type of fuel. Alternatively, flame thickness (δ) decreases with the increase in Φ for the three fuels. Characteristic “V” shape with almost identical outer recirculation zone (ORZ) is also observed for the three fuels. Among the studied fuels, oxy-methane flames demonstrate highest flame thicknesses, least uniform temperature distribution (highest pattern factor) at combustor outlet, and lowest CO emission level. Oxy-syngas flames show more uniform temperature distribution (lowest pattern factor) at combustor outlet and highest CO emission as compared with the oxy-methane and oxy-propane flames. The oxy-propane flames have higher values of Tad, LFS, PD, PFR, Da, and thermal power (TP) along with lowest flame thickness compared with methane and syngas counterparts. Highlights: Increasing equivalence ratio improves the flame characteristics but increases CO emission. Fuel type has insignificant effects on shape/size of the outer recirculation zone (ORZ). Oxy-methane flames showed highest flame thicknesses and pattern factor and lowest CO. Oxy-syngas flames demonstrate highest CO emission and lowest pattern factor. Oxy-propane flames demonstrate higher values of temperature (Tad), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and thermal power (TP).

KW - carbon capture

KW - fuel flexibility

KW - gas turbine

KW - large eddy simulations (LES)

KW - syngas combustion

KW - turbulent reacting flow

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U2 - 10.1002/er.7745

DO - 10.1002/er.7745

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SN - 0363-907X

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Analysis of methane, propane, and syngas oxy-flames in a fuel-flex gas turbine combustor for carbon capture

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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Prizes

High Impact Paper Award 2023

Cite this