Strategies for fuel property enhancement for second-generation multi-feedstock biodiesel

Goh, BHH; Chong, CT; Ong, HC; Milano, J; Shamsuddin, AH; Lee, XJ; Ng, JH

Strategies for fuel property enhancement for second-generation multi-feedstock biodiesel

Goh, BHH Chong, CT Ong, HC Milano, J Shamsuddin, AH Lee, XJ Ng, JH

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Fuel, 2022, 315
Issue Date:: 2022-05-01

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Field	Value	Language
dc.contributor.author	Goh, BHH
dc.contributor.author	Chong, CT
dc.contributor.author	Ong, HC
dc.contributor.author	Milano, J
dc.contributor.author	Shamsuddin, AH
dc.contributor.author	Lee, XJ
dc.contributor.author	Ng, JH
dc.date.accessioned	2023-04-11T01:44:41Z
dc.date.available	2023-04-11T01:44:41Z
dc.date.issued	2022-05-01
dc.identifier.citation	Fuel, 2022, 315
dc.identifier.issn	0016-2361
dc.identifier.issn	1873-7153
dc.identifier.uri	http://hdl.handle.net/10453/169481
dc.description.abstract	Fatty acids from non-edible bioresources are highly sought after as biofuel feedstock and the use of multi-stream feedstock for biodiesel production is of interest. This study explores the potential of using blended feedstock consisting of inedible jatropha oil (JO) and waste cooking oil (WO) for biodiesel production. Prior to blending, the unfavourable high acid value of jatropha oil was esterified under the most optimal conditions of 60 °C, 1% H2SO4 catalyst and alcohol to oil molar ratio of 11:1 to maximise the esterified yield (81.1 %). Based on the acid value measurement, the optimum volumetric blend of WO/EJO was determined to be 90/10 with the lowest acid value of 1.9 mg KOH g−1, which was then utilised as feedstock for base-catalysed transesterification. The KOH catalysed transesterification was optimised at 60 °C, 1 wt% KOH catalyst and alcohol to oil molar ratio of 6:1 to produce biodiesel with low acid value (0.2 mg KOH g−1), high calorific value (38.4 MJ kg−1), high oxidation stability (∼11 h) and favourable viscosity (4.7 mm2 s−1). The results show that the produced biodiesel has acceptable physicochemical properties but its properties can further be improved by blending with petroleum diesel and antioxidant. Among those produced blend derivatives, petroleum diesel and biodiesel blend (80:20) or B20 showed the best improvement with high calorific value (46.6 MJ/kg), high oxidation stability (∼37 h) and low acid value (0.3 mg KOH g−1). Based on the study, in situ feedstock blending of WO/EJO can improve the physicochemical properties of the produced biodiesel and reduce the dependency on single feedstock. Biodiesel blending with commercial diesel can enhance the biodiesel fuel properties and such derivatives can be directly applied in an existing engine.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Fuel
dc.relation.isbasedon	10.1016/j.fuel.2022.123178
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0306 Physical Chemistry (incl. Structural), 0904 Chemical Engineering, 0913 Mechanical Engineering
dc.subject.classification	Energy
dc.title	Strategies for fuel property enhancement for second-generation multi-feedstock biodiesel
dc.type	Journal Article
utslib.citation.volume	315
utslib.for	0306 Physical Chemistry (incl. Structural)
utslib.for	0904 Chemical Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-04-11T01:44:40Z
pubs.publication-status	Published
pubs.volume	315

Abstract:

Fatty acids from non-edible bioresources are highly sought after as biofuel feedstock and the use of multi-stream feedstock for biodiesel production is of interest. This study explores the potential of using blended feedstock consisting of inedible jatropha oil (JO) and waste cooking oil (WO) for biodiesel production. Prior to blending, the unfavourable high acid value of jatropha oil was esterified under the most optimal conditions of 60 °C, 1% H2SO4 catalyst and alcohol to oil molar ratio of 11:1 to maximise the esterified yield (81.1 %). Based on the acid value measurement, the optimum volumetric blend of WO/EJO was determined to be 90/10 with the lowest acid value of 1.9 mg KOH g−1, which was then utilised as feedstock for base-catalysed transesterification. The KOH catalysed transesterification was optimised at 60 °C, 1 wt% KOH catalyst and alcohol to oil molar ratio of 6:1 to produce biodiesel with low acid value (0.2 mg KOH g−1), high calorific value (38.4 MJ kg−1), high oxidation stability (∼11 h) and favourable viscosity (4.7 mm2 s−1). The results show that the produced biodiesel has acceptable physicochemical properties but its properties can further be improved by blending with petroleum diesel and antioxidant. Among those produced blend derivatives, petroleum diesel and biodiesel blend (80:20) or B20 showed the best improvement with high calorific value (46.6 MJ/kg), high oxidation stability (∼37 h) and low acid value (0.3 mg KOH g−1). Based on the study, in situ feedstock blending of WO/EJO can improve the physicochemical properties of the produced biodiesel and reduce the dependency on single feedstock. Biodiesel blending with commercial diesel can enhance the biodiesel fuel properties and such derivatives can be directly applied in an existing engine.

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