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

Chong, Cheng Tung, Chiong, Meng-Choung, Ng, Jo-Han, Lim, Mooktzeng, Tran, Manh-Vu, Valera Medina, Agustin ORCID: https://orcid.org/0000-0003-1580-7133 and Chong, William Woei Fong 2019. Oxygenated sunflower biodiesel: Spectroscopic and emissions quantification under reacting swirl spray conditions. Energy 178 , pp. 804-813. 10.1016/j.energy.2019.04.201

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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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	0360-5442
Date of First Compliant Deposit:	17 May 2019
Date of Acceptance:	27 April 2019
Last Modified:	06 Nov 2023 23:47
URI:	https://orca.cardiff.ac.uk/id/eprint/122594

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