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Extraction of Lipids from Chlorella Alga by Supercritical Hexane and Demonstration of Their Subsequent Catalytic Hydrodeoxygenation

Lookup NU author(s): Dr Hoang NguyenORCiD


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Extraction of lipids from Chlorella algae with supercritical hexane resulted in the high lipids yield of approximately 10% obtained at optimum conditions in terms of extraction time and agitation compared to the total content of lipids being 12%. Furthermore, an easiness of hexane recovery may be considered as economically and ecologically attractive. For the first time, in the current work catalytic hydrodeoxygenation (HDO) of Chlorella algal lipids was studied over 5 wt % Ni/SiO 2 at 300 °C and under 30 bar total pressure in H2 . The conversion of lipids was about 15% as the catalyst was totally deactivated after 60 min. The transformation of lipids proceeded mostly via hydrogenation and hydrogenolysis with formation of free fatty acid (FFA). Lower activity might be attributed to deactivation of catalysts caused by chlorophylls and carotenoids. Even though the conversion is low, future studies in HDO of lipids extracted from other algae species having higher lipid content could be proposed. A coke resistant catalyst might be considered to improve catalytic activity.

Publication metadata

Author(s): Nguyen HSH, Hachemi I, Rudnas A, Maki-Arvela P, Smeds A, Aho A, Hemming J, Peurla M, Murzin DY

Publication type: Article

Publication status: Published

Journal: Industrial & Engineering Chemistry Research

Year: 2016

Volume: 55

Issue: 40

Pages: 10626-10634

Print publication date: 12/10/2016

Online publication date: 03/10/2016

Acceptance date: 26/09/2016

ISSN (print): 0888-5885

ISSN (electronic): 1520-5045

Publisher: American Chemical Society


DOI: 10.1021/acs.iecr.6b03041


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