Effect of antioxidants and blending with diesel on partially hydrogenated fish oil biodiesel to upgrade the oxidative stability

Fish oil derived biodiesel has susceptibility to oxidation due to its higher polyunsaturated fatty acid content. Therefore, to control the rapid oxidation process, partial hydrogenation of fish oil biodiesel under 0.5 MPa pressure of H2 by using 0.5% Pd supported on Al2O3 spherical catalyst was done...

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Bibliographic Details
Published in:Bioresource technology reports 2022-02, Vol.17, p.100938, Article 100938
Main Authors: Hossain, Mosharof, Israt, Sharmin Sultana, Muntaha, Nuzhat, Jamal, Mohammad Shah
Format: Article
Language:English
Subjects:
Antioxidants
Biodiesel
Fish oil
Oxidative stability
Partial hydrogenation
Polyunsaturation
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Summary:Fish oil derived biodiesel has susceptibility to oxidation due to its higher polyunsaturated fatty acid content. Therefore, to control the rapid oxidation process, partial hydrogenation of fish oil biodiesel under 0.5 MPa pressure of H2 by using 0.5% Pd supported on Al2O3 spherical catalyst was done. It showed 8.0 h of oxidation stability after 1.0 h reaction higher than non‑hydrogenated fish oil biodiesel (0.1 h). A decrease in the rate of polyunsaturation (>95%) was achieved after 1.5 h of selective hydrogenation reaction with 17.3 h oxidation stability. Simultaneously, addition of antioxidants, such as3,5-di-tert-butyl-4-hydroxytoluene and tert-butylhydroquinone, to hydrogenated biodiesel was also performed to enhance its induction period more. Hydrogenated biodiesel was further blended with diesel to increase induction period and reduce the pour point. Thus, iodine value, viscosity, acid value and peroxide value of hydrogenated fish oil biodiesel met the EN 14214:2012 standard to be implemented as commercial automobile fuel. [Display omitted] •Hydrogenation suggested for upgrading fish oil biodiesel to commercial use.•TBHQ addition to HYD FOME has lengthened the storage capacity.•Selective hydrogenation has completely removed C20:5 and C22:6.•Blended HYD FOME improved pour point and oxidation stability.
ISSN:2589-014X
2589-014X
DOI:10.1016/j.biteb.2021.100938