A renewable lignin-derived bio-oil for boosting the oxidation stability of biodiesel

Umar, Y. and Velasco, O. and Abdelaziz, O.Y. and Aboelazayem, O. and Gadalla, M.A. and Hulteberg, C.P. and Saha, B. (2022) A renewable lignin-derived bio-oil for boosting the oxidation stability of biodiesel. Renewable Energy, 182. pp. 867-878. ISSN 0960-1481

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Abstract

The valorisation of lignin is being increasingly recognised to improve the economics of pulp and paper making mills. In the present study, an integrated lignin–glycerol valorisation strategy is introduced with an overarching aim for enhancing the process value chains. LignoBoost kraft lignin was subjected to base-catalysed depolymerisation using glycerol as a co-solvent. The generated bio-oil was used as a renewable additive to biodiesel for enhancing its oxygen stability. The influence of three independent parameters including temperature, time and glycerol amount on lignin depolymerisation was investigated. Response surface methodology was applied to design the experiments and to optimise the process for maximising the yield and antioxidant impact of bio-oil. The results showed that glycerol has a positive qualitative and quantitative impact on the produced bio-oil, where an enhancement in the yield (up to 23.8%) and antioxidant activity (up to 99 min induction period) were achieved using the PetroOxy method (EN16091). The addition of 1 wt% bio-oil to biodiesel has led to an improvement in the oxidation stability over a neat sample of up to ∼340%, making it compliant with European standard (EN14214). The proposed process presents a biorefinery paradigm for the integrated utilisation of waste cooking oil, lignin and glycerol.

Item Type:
Journal Article
Journal or Publication Title:
Renewable Energy
Additional Information:
This is the author’s version of a work that was accepted for publication in Renewable Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Renewable Energy, 182, 2021 DOI: 10.1016/j.renene.2021.10.061
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2100/2105
Subjects:
ID Code:
162186
Deposited By:
Deposited On:
11 Nov 2021 13:55
Refereed?:
Yes
Published?:
Published
Last Modified:
30 Nov 2021 16:46