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Bioresour Technol. 2018 Jan;247:568-575. doi: 10.1016/j.biortech.2017.08.134. Epub 2017 Sep 10.

Conversion of levulinic acid into alkyl levulinates: Using lipase immobilized on meso-molding three-dimensional macroporous organosilica as catalyst.

Author information

1
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
2
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China; National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, Hebei University of Technology, Tianjin 300130, China. Electronic address: yanjunjiang@hebut.edu.cn.

Abstract

For conversion of biomass-derived levulinic acid into alkyl levulinates, a novel kind of lipase-based biocatalyst was prepared through immobilized lipase B from C. antarctica (CALB) on organosilica material with highly ordered 3D macroporous organosilica frameworks and a 2D hexagonal meso-structure (named 3DOM/m-OS) for the first time. The catalytic performance of the immobilized lipase (NER@3DOM/m-OS) was investigated. NER@3DOM/m-OS was used as biocatalyst to catalyze the esterification reaction between levulinic acid (LA) and n-butanol. Under optimized reaction conditions, 74.59% of ester yield was achieved after 12h of reaction. NER@3DOM/m-OS was also used to production of other alkyl levulinates, the ester yields increased to 84.51% (octyl levulinate) and 91.14% (dodecyl levulinate), respectively. When NER@3DOM/m-OS was used repeatedly in batch reactions, the ester yields of n-butyl, octyl, and dodecyl levulinate could retain 46.18%, 82.33% and 81.25% after 9 reaction cycles, respectively, which was better than commercial lipase Novozym 435 under the same condition.

KEYWORDS:

Alkyl levulinates; Immobilized lipase; Levulinic acid; Meso-molding; Organosilica; Three-dimensional macroporous

PMID:
28982086
DOI:
10.1016/j.biortech.2017.08.134
[Indexed for MEDLINE]

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