Valorisation of microalgae residues after lipid extraction: Pyrolysis characteristics for biofuel production

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dc.contributor.authorHuang, Zhigang
dc.contributor.authorZhang, Jiang
dc.contributor.authorPan, Minmin
dc.contributor.authorHao, Yuhang
dc.contributor.authorHu, Ruichen
dc.contributor.authorXiao, Wenbo
dc.contributor.authorLi, Gang
dc.contributor.authorLyu, Tao
dc.date.accessioned2022-01-17T15:15:07Z
dc.date.available2022-01-17T15:15:07Z
dc.date.issued2021-12-31
dc.description.abstractAs a promising source of renewable energy, biofuel from microalgae pyrolysis is seen as a competitive alternative to fossil fuels. However, currently, the widely applied pre-treatment process of lipid extraction results in large amounts of microalgae residues, which though with energy potential, being considered as process wastes and ignored of its re-utilization potential. In this study, a new workflow of biofuel generation from microalgae biomass through lipid extraction and pyrolysis of defatted microalgae residues was proposed and assessed. The effects of lipid extraction and pyrolysis temperature (350–750 ℃) on pyrolysis products were investigated, and pyrolysis pathways were postulated. To address the twin goals of lowering emission of pollutants and elevating energy products, an optimal pyrolysis temperature of 650 ℃ was suggested. After extraction of lipids, the relative contents of valuable products (aromatic, aliphatic hydrocarbons and fatty acids) and some harmful by-products, e.g., PAHs, significantly reduced, while other harmful substrates, e.g., nitrogen-compounds increased. Mechanistic investigations indicated that pyrolysis of proteins without the presence of lipids could promote higher production of nitrogen-containing organics and aromatics. These results reveal the effects of lipid extraction and variation of temperature on microalgal pyrolysis, and also provide a basis for full utilization of microalgae as an aid to alleviate many fossil energy problems.en_UK
dc.identifier.citationHuang Z, Zhang J, Pan M, et al., (2022) Valorisation of microalgae residues after lipid extraction: Pyrolysis characteristics for biofuel production. Biochemical Engineering Journal, Volume 179, February 2022, Article number 108330en_UK
dc.identifier.issn1369-703X
dc.identifier.urihttps://doi.org/10.1016/j.bej.2021.108330
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/17412
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectBioenergyen_UK
dc.subjectPyrolysis pathwaysen_UK
dc.subjectNet-zero emissionen_UK
dc.subjectMicroalgae technologyen_UK
dc.subjectCircular economyen_UK
dc.titleValorisation of microalgae residues after lipid extraction: Pyrolysis characteristics for biofuel productionen_UK
dc.typeArticleen_UK

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