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Oxygenated sunflower biodiesel: Spectroscopic and emissions quantification under reacting swirl spray conditions

Oxygenated sunflower biodiesel: Spectroscopic and emissions quantification under reacting swirl spray conditions
Oxygenated sunflower biodiesel: Spectroscopic and emissions quantification under reacting swirl spray conditions

The spray combustion characteristics of sunflower (Helianthus annuus) biodiesel/methyl esters (SFME) and 50% SFME/diesel blend and diesel were investigated via a liquid swirl flame burner. The swirl flame was established at atmospheric condition by using a combined twin-fluid atomiser-swirler configuration at varied atomising air-to-liquid ratios (ALR) of 2.0–2.5. Diesel flame showed a sooty flame brush downstream of the main reaction zone, as opposed to the biodiesel flame which showed a non-sooty, bluish flame core. Biodiesel flame exhibited a more intense flame spectra with higher OH* radicals as compared to diesel. Higher preheating main swirl air temperature led to higher NO emission, while CO correspondingly decreased. Sunflower-derived biodiesel generally exhibited slightly higher NO and CO levels than diesel when compared at the same power output, mostly due to higher flame temperature and fuel chemistry effect. By increasing ALR, a significant reduction of NO and CO for both fuel types were concurrently achieved, presenting a strategy to control emissions and atomise biodiesel with higher viscosity under swirl combustion mode.

Atomisation, Biodiesel, Emissions, Methyl esters, Sunflower, Swirl
0360-5442
804-813
Chong, Cheng Tung
65b12c86-8a3e-45e8-873c-7db0c8b2cbd9
Chiong, Meng Choung
f6e7653c-17fa-4f7c-95e8-e4b46add0cf1
Ng, Jo Han
4c9c51bd-1cfc-46c0-b519-23b77566fe50
Lim, Mooktzeng
11ed0732-b2ac-424b-b98c-489ec5d24edb
Tran, Manh Vu
0a5a5a74-9c01-47bd-8f71-19da7460246e
Valera-Medina, Agustin
70389790-bf77-4d45-ae7e-0f848a057c13
Chong, William Woei Fong
bb7bc2ce-1866-4fb0-8b82-5a6d2381b67a
Chong, Cheng Tung
65b12c86-8a3e-45e8-873c-7db0c8b2cbd9
Chiong, Meng Choung
f6e7653c-17fa-4f7c-95e8-e4b46add0cf1
Ng, Jo Han
4c9c51bd-1cfc-46c0-b519-23b77566fe50
Lim, Mooktzeng
11ed0732-b2ac-424b-b98c-489ec5d24edb
Tran, Manh Vu
0a5a5a74-9c01-47bd-8f71-19da7460246e
Valera-Medina, Agustin
70389790-bf77-4d45-ae7e-0f848a057c13
Chong, William Woei Fong
bb7bc2ce-1866-4fb0-8b82-5a6d2381b67a

Chong, Cheng Tung, Chiong, Meng Choung, Ng, Jo Han, Lim, Mooktzeng, Tran, Manh Vu, Valera-Medina, Agustin and Chong, William Woei Fong (2019) Oxygenated sunflower biodiesel: Spectroscopic and emissions quantification under reacting swirl spray conditions. Energy, 178, 804-813. (doi:10.1016/j.energy.2019.04.201).

Record type: Article

Abstract

The spray combustion characteristics of sunflower (Helianthus annuus) biodiesel/methyl esters (SFME) and 50% SFME/diesel blend and diesel were investigated via a liquid swirl flame burner. The swirl flame was established at atmospheric condition by using a combined twin-fluid atomiser-swirler configuration at varied atomising air-to-liquid ratios (ALR) of 2.0–2.5. Diesel flame showed a sooty flame brush downstream of the main reaction zone, as opposed to the biodiesel flame which showed a non-sooty, bluish flame core. Biodiesel flame exhibited a more intense flame spectra with higher OH* radicals as compared to diesel. Higher preheating main swirl air temperature led to higher NO emission, while CO correspondingly decreased. Sunflower-derived biodiesel generally exhibited slightly higher NO and CO levels than diesel when compared at the same power output, mostly due to higher flame temperature and fuel chemistry effect. By increasing ALR, a significant reduction of NO and CO for both fuel types were concurrently achieved, presenting a strategy to control emissions and atomise biodiesel with higher viscosity under swirl combustion mode.

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More information

Accepted/In Press date: 27 April 2019
e-pub ahead of print date: 2 May 2019
Published date: 1 July 2019
Keywords: Atomisation, Biodiesel, Emissions, Methyl esters, Sunflower, Swirl

Identifiers

Local EPrints ID: 434691
URI: http://eprints.soton.ac.uk/id/eprint/434691
ISSN: 0360-5442
PURE UUID: 74157d80-3f53-433e-87ce-2213d3eb0966

Catalogue record

Date deposited: 04 Oct 2019 16:30
Last modified: 25 Nov 2021 17:01

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Contributors

Author: Cheng Tung Chong
Author: Meng Choung Chiong
Author: Jo Han Ng
Author: Mooktzeng Lim
Author: Manh Vu Tran
Author: Agustin Valera-Medina
Author: William Woei Fong Chong

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