eprintid: 19429
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/94/29
datestamp: 2024-06-04 14:11:53
lastmod: 2024-06-04 14:11:53
status_changed: 2024-06-04 14:05:42
type: article
metadata_visibility: show
creators_name: Kam, Y.L.
creators_name: Agutaya, J.K.C.N.
creators_name: Quitain, A.T.
creators_name: Ogasawara, Y.
creators_name: Sasaki, M.
creators_name: Lam, M.K.
creators_name: Yusup, S.
creators_name: Assabumrungrat, S.
creators_name: Kida, T.
title: In-situ transesterification of microalgae using carbon-based catalyst under pulsed microwave irradiation
ispublished: pub
keywords: Biodiesel; Catalysts; Cost effectiveness; Fatty acids; Graphene; Irradiation; Lipids; Methanol; Microorganisms; Microwave irradiation; Titration; Transesterification, Carbon based catalysts; Fatty acids methyl esters; Graphene oxides; In-situ transesterification; Micro-algae; Microwave- irradiations; Pulsed microwaves; Situ transesterification; ]+ catalyst, Microalgae, biofuel; biomass; catalyst; fatty acid; methanol; microalga; microwave radiation
note: cited By 2
abstract: In the production of biofuels, microalgae represent an emerging class of renewable feedstock that can address the problems associated with the use of the traditional land-based lignocellulosic biomass. The high lipid content of microalgae makes them ideal in producing fatty acid methyl esters (FAME), the main components of biodiesel. In this study, the transesterification of the lipids in Chlorella vulgaris with methanol was performed in-situ using graphene oxide (GO) under microwave irradiation. From FTIR measurements and titration experiments, GO was shown to possess oxygen functional groups that can serve as catalysts in transesterification. Moreover, the catalytic performance of GO in terms of FAME yield was found to be better than conventional metal-based catalysts. Microwave irradiation, on the other hand, was found to offer a more efficient heating than conventional methods by taking advantage of the excellent microwave absorptivity of methanol and the local heating induced on the surface of GO. Furthermore, irradiation of microwave in pulses rather than in a continuous mode was shown to be more cost-effective. It is proposed that the high energy introduced into the biomass at short time intervals facilitated the release of more lipids by more effectively disrupting the algal cell wall. Lastly, operating with a methanol reflux allowed the microwave-irradiated system to be operated at the boiling point of methanol (Tb = 64.7 °C) while providing a higher FAME yield than an operation at 160 °C without reflux. This study presents graphene oxide under microwave irradiation as a green, carbon-based, and sustainable catalyst in the production of biodiesel from microalgae. © 2022 Elsevier Ltd
date: 2023
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143166920&doi=10.1016%2fj.biombioe.2022.106662&partnerID=40&md5=0ac0c54e286e52ef7c869f0870afcbf7
id_number: 10.1016/j.biombioe.2022.106662
full_text_status: none
publication: Biomass and Bioenergy
volume: 168
refereed: TRUE
citation:   Kam, Y.L. and Agutaya, J.K.C.N. and Quitain, A.T. and Ogasawara, Y. and Sasaki, M. and Lam, M.K. and Yusup, S. and Assabumrungrat, S. and Kida, T.  (2023) In-situ transesterification of microalgae using carbon-based catalyst under pulsed microwave irradiation.  Biomass and Bioenergy, 168.