Ultrasonic assisted oil extraction and biodiesel synthesis of Spent Coffee Ground

Goh, BHH; Ong, HC; Chong, CT; Chen, WH; Leong, KY; Tan, SX; Lee, XJ

Ultrasonic assisted oil extraction and biodiesel synthesis of Spent Coffee Ground

Goh, BHH Ong, HC Chong, CT Chen, WH Leong, KY Tan, SX Lee, XJ

Permalink

Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Fuel, 2020, 261
Issue Date:: 2020-02-01

Closed Access

	Filename	Description	Size
	1-s2.0-S0016236119314759-main.pdf	Published version	473.17 kB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Goh, BHH
dc.contributor.author	Ong, HC
dc.contributor.author	Chong, CT
dc.contributor.author	Chen, WH
dc.contributor.author	Leong, KY
dc.contributor.author	Tan, SX
dc.contributor.author	Lee, XJ
dc.date.accessioned	2021-02-04T05:42:23Z
dc.date.available	2021-02-04T05:42:23Z
dc.date.issued	2020-02-01
dc.identifier.citation	Fuel, 2020, 261
dc.identifier.issn	0016-2361
dc.identifier.issn	1873-7153
dc.identifier.uri	http://hdl.handle.net/10453/145839
dc.description.abstract	© 2019 Spent Coffee Ground (SCG) was studied as a potential source of oil feedstock for biodiesel production as an alternative waste utilisation instead of being disposed as municipal waste. This study evaluated the ultrasonic assisted oil extraction from SCG, which was followed by biodiesel conversion via transesterification. Hexane was found to be the most effective extractant for SCG oil. Soxhlet extraction could obtain maximum SCG oil yield of 12.5% within 3 h whereas the highest SCG oil yield (14.52%) using ultrasonic extraction was obtained at hexane to SCG ratio of 4 mL g−1 and at 30% ultrasonic amplitude for 30 min. The improved oil yield with shorter extraction time was due to the ultrasonic fragmentation on SCG cells, which enhanced the interactions between oil and solvents. Fourier transform infrared analysis showed that the SCG oil possessed suitable functional groups for biodiesel conversion. Then, the SCG oil was successfully converted to biodiesel via ultrasonic assisted transesterification. The optimal FAME yield (97.11%) was achieved with molar ratio of methanol to SCG oil of 30:1, 4 wt% of catalyst concentration, at 30% ultrasonic amplitude and for 3 h. The produced SCG biodiesel has promising properties which adhere to the biodiesel standards but acid value was beyond the permissible limit which could be overcome by utilising as blend feedstock with other commercially available biodiesel. The high calorific value along with low viscosity, density and corrosion properties suggested SCG biodiesel as an interesting and viable option for biodiesel blending.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Fuel
dc.relation.isbasedon	10.1016/j.fuel.2019.116121
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	Ultrasonic assisted oil extraction and biodiesel synthesis of Spent Coffee Ground
dc.type	Journal Article
utslib.citation.volume	261
utslib.for	0306 Physical Chemistry (incl. Structural)
utslib.for	0904 Chemical Engineering
utslib.for	0913 Mechanical Engineering
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 Information, Systems and Modelling
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2021-02-04T05:42:09Z
pubs.publication-status	Published
pubs.volume	261

Abstract:

© 2019 Spent Coffee Ground (SCG) was studied as a potential source of oil feedstock for biodiesel production as an alternative waste utilisation instead of being disposed as municipal waste. This study evaluated the ultrasonic assisted oil extraction from SCG, which was followed by biodiesel conversion via transesterification. Hexane was found to be the most effective extractant for SCG oil. Soxhlet extraction could obtain maximum SCG oil yield of 12.5% within 3 h whereas the highest SCG oil yield (14.52%) using ultrasonic extraction was obtained at hexane to SCG ratio of 4 mL g−1 and at 30% ultrasonic amplitude for 30 min. The improved oil yield with shorter extraction time was due to the ultrasonic fragmentation on SCG cells, which enhanced the interactions between oil and solvents. Fourier transform infrared analysis showed that the SCG oil possessed suitable functional groups for biodiesel conversion. Then, the SCG oil was successfully converted to biodiesel via ultrasonic assisted transesterification. The optimal FAME yield (97.11%) was achieved with molar ratio of methanol to SCG oil of 30:1, 4 wt% of catalyst concentration, at 30% ultrasonic amplitude and for 3 h. The produced SCG biodiesel has promising properties which adhere to the biodiesel standards but acid value was beyond the permissible limit which could be overcome by utilising as blend feedstock with other commercially available biodiesel. The high calorific value along with low viscosity, density and corrosion properties suggested SCG biodiesel as an interesting and viable option for biodiesel blending.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/145839