Esterification using a liquid lipase to remove residual free fatty acids in biodiesel

[Display omitted] •Full enzymatic process for high FFA feedstocks to biodiesel with < 0.25 % FFA, demonstrated.•Reaction system using liquid Lipase B from Candida antarctica with glycerol as carrier, demonstrated.•Isolation and reusability of liquid formulated enzyme, demonstrated.•Two types of r...

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Bibliographic Details
Published in:Process biochemistry (1991) 2020-10, Vol.97, p.213-221
Main Authors: Hansen, R.B., Agerbaek, M.A., Nielsen, P.M., Rancke-Madsen, A., Woodley, J.M.
Format: Article
Language:English
Subjects:
Biodiesel
Biodiesel fuels
Biofuels
Candida antarctica lipase B
Diesel
Drying process
Economics
Enzymes
Esterification
FAME
Fatty acids
Glycerol
High yield
Industrial production
Lipase
Profitability
Transesterification
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Summary:[Display omitted] •Full enzymatic process for high FFA feedstocks to biodiesel with < 0.25 % FFA, demonstrated.•Reaction system using liquid Lipase B from Candida antarctica with glycerol as carrier, demonstrated.•Isolation and reusability of liquid formulated enzyme, demonstrated.•Two types of reactor setups for the process (flash and SBR) discussed and documented. Lately, the price of liquid formulated lipase enzymes, usable in biodiesel production, has been significantly reduced. This enables one-time use of these enzymes for transesterification, and the process is used industrially. However, the process suffers a drawback by leaving 2−3 % free fatty acids in the crude biodiesel, which reduces the profitability. This article discusses a novel enzymatic FFA esterification reaction utilizing liquid lipase B from Candida antarctica (CALB) along with glycerol at low water concentrations to eliminate the residual FFA. The reaction setup was found able to reduce the free fatty acid concentration to within biodiesel specifications of
ISSN:1359-5113
1873-3298
DOI:10.1016/j.procbio.2020.06.005