Quantification of carbon particulates produced under open liquid pool and prevaporised flame conditions: Waste cooking oil biodiesel and diesel blends

Journal article


Chong, Cheng Tung, Tian, Bo, Jo-Han, Ng, Fan, Luming, Wong, Kang Yao and Hochgreb, Simone 2020. Quantification of carbon particulates produced under open liquid pool and prevaporised flame conditions: Waste cooking oil biodiesel and diesel blends. Fuel. https://doi.org/10.1016/j.fuel.2020.117469
AuthorsChong, Cheng Tung, Tian, Bo, Jo-Han, Ng, Fan, Luming, Wong, Kang Yao and Hochgreb, Simone
Abstract

The soot volume fraction (SVF) of waste cooking oil (WCO) biodiesel and blends was quantified and compared under the same total carbon flow rate via two experimental setups, namely prevaporised diffusion jet flames and pool flames using extinction calibrated laser induced-incandescence (LII). The spatial SVF distribution shows that for diesel-rich fuels, soot formation peaks near the flame and is convected downstream, whereas biodiesel flames show a more evenly distributed SVF at the flame center region. An increase in biodiesel fraction in diesel results in a reduced propensity for soot, as evident in both pool and vapour flames. Comparison of the radial profiles of SVF along the centerline shows broader SVF profiles for pool flames, reflecting the longer residence times for soot diffusion and growth compared to vapour flames, which reflected the lower mass flux for the pool burner. The total soot produced from pool flames was found to be higher than vapour flame by a factor of two for the same fuel mass consumption rate. WCO biodiesel exhibited the lowest total SVF value regardless of flame type owing to the combined effects of lack of aromatic compounds and fuel chemistry. The soot primary particle sizes produced by WCO biodiesel show lower mean diameter values by a factor of approximately 1.5 compared to diesel-produced soot. The pool flames produced carbon particulates of larger mean diameter by around 22% and 8% for diesel and WCO biodiesel, respectively, relative to the counterpart vapour flames, as a result of extended soot surface growth period.

KeywordsWaste cooking oil, Biodiesel, Soot volume fraction, Laser induced-incandescence, Extinction, Soot
Year2020
JournalFuel
PublisherElsevier
ISSN1873-7153
Digital Object Identifier (DOI)https://doi.org/10.1016/j.fuel.2020.117469
Web address (URL)http://hdl.handle.net/10545/624883
hdl:10545/624883
Publication dates13 Mar 2020
Publication process dates
Deposited16 Jun 2020, 14:59
Accepted23 Feb 2020
ContributorsShanghai Jiao Tong University, University of Derby, University of Southampton Malaysia and University of Cambridge
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https://repository.derby.ac.uk/item/94028/quantification-of-carbon-particulates-produced-under-open-liquid-pool-and-prevaporised-flame-conditions-waste-cooking-oil-biodiesel-and-diesel-blends

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