eprintid: 14984
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/49/84
datestamp: 2023-11-10 03:29:34
lastmod: 2023-11-10 03:29:34
status_changed: 2023-11-10 01:58:20
type: article
metadata_visibility: show
creators_name: Nguyen, T.T.
creators_name: Lam, M.K.
creators_name: Cheng, Y.W.
creators_name: Uemura, Y.
creators_name: Mansor, N.
creators_name: Lim, J.W.
creators_name: Show, P.L.
creators_name: Tan, I.S.
creators_name: Lim, S.
title: Reaction kinetic and thermodynamics studies for in-situ transesterification of wet microalgae paste to biodiesel
ispublished: pub
keywords: Activation energy; Algae; Association reactions; Biodiesel; Esters; Fatty acids; Kinetic energy; Kinetics; Lipids; Microorganisms; Thermodynamics; Transesterification, Activation energies (Ea); Chlorella vulgaris; Fatty acid esters; Kinetics and thermodynamics; Lipid extraction; Overall reactions; Reaction system; Situ transesterification, Reaction kinetics
note: cited By 14
abstract: In-situ transesterification of wet microalgae is one of the emerging methods to produce biodiesel as this approach exclude energy-intensive steps (e.g. drying and lipid extraction) through process merging. Nevertheless, studies related to reaction kinetics and thermodynamic of such process are still limited in the literature while this information are necessary for process design and intensification. Thus, the present study was aimed to evaluate the reaction kinetics and thermodynamics of in-situ transesterification of wet Chlorella vulgaris. It was found that the fatty acid esters (FAE) yield was increased with reaction time and temperature due to gradual conversion of esterifiable lipids to FAE and higher kinetic energy of reactants. In-situ transesterification of C. vulgaris at 60 °C resulted high FAE yields (>90 wt.) within a short reaction duration (25�35 min). The in-situ transesterification of C. vulgaris was found to follow first order of overall reaction (with respect to esterifiable lipids) and attained activation energy (EA) of 50.4�60.4 kJ/mol. In addition, the in-situ transesterification of wet C. vulgaris is an endothermic (�H = 50.4�60.4 kJ/mol) and non-spontaneous (�G = 87.7�88.4 kJ/mol) reaction that decreased the randomness of reaction system (�S = �0.082 to �0.114 kJ/mol K). © 2021 Institution of Chemical Engineers
date: 2021
publisher: Institution of Chemical Engineers
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103758321&doi=10.1016%2fj.cherd.2021.03.021&partnerID=40&md5=babba942758593a0c0a4cc75242e2d8a
id_number: 10.1016/j.cherd.2021.03.021
full_text_status: none
publication: Chemical Engineering Research and Design
volume: 169
pagerange: 250-264
refereed: TRUE
issn: 02638762
citation:   Nguyen, T.T. and Lam, M.K. and Cheng, Y.W. and Uemura, Y. and Mansor, N. and Lim, J.W. and Show, P.L. and Tan, I.S. and Lim, S.  (2021) Reaction kinetic and thermodynamics studies for in-situ transesterification of wet microalgae paste to biodiesel.  Chemical Engineering Research and Design, 169.  pp. 250-264.  ISSN 02638762