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In relation to this article, we declare that there is no conflict of interest.
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Received December 26, 2020
Accepted February 8, 2021
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Platform chemicals production from lipid-extracted Chlorella vulgaris through an eco-friendly catalyst

Department of Biotechnology, Pukyong National University, Busan 48513, Korea
gtjeong@pknu.ac.kr
Korean Journal of Chemical Engineering, May 2021, 38(5), 997-1005(9), 10.1007/s11814-021-0764-x
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Abstract

Microalgae are a widely available, renewable, and sustainable resource for bioenergy which may be used as a carbon-neutral alternative. We conducted hydrothermal conversion with MSA to obtain levulinic (LA) and formic acids (FA) from the lipid-extracted Chlorella vulgaris. Based on our analysis of reciprocal interactions between reaction conditions, maximum LA yields were obtained at high temperature, mid-range catalyst concentration, and mid-/longrange reaction time. Maximum FA yields were obtained at high temperature, high-range acid concentration, and short-/ mid-range time. Using the Box-Behnken method to optimize the reaction, yields of 39.17% for LA and 20.19% for FA were obtained with 5% biomass, 0.5M MSA at 195 °C for 35 min. Moreover, the effect of CSF on yield of LA and FA could be suitably represented by Sigmoidal equations with high R2. Overall, the application of lipid-extracted microalgae residue and eco-friendly MSA may prove useful for platform chemicals production.

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