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A reactive coupling process for co-production of solketal and biodiesel

Lookup NU author(s): Luma Al-Saadi, Dr Valentine Eze, Professor Adam Harvey



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2019 Al-Saadi et al.A "reactive coupling" process for one-pot transesterification of rapeseed oil into fatty acid methyl esters (FAME) for biodiesel, and in situ acetalisation of the glycerol by-product to solketal was investigated by both an experimental and a kinetic modelling approach. The aim was to develop a process with a more valuable co-products than glycerol, and to minimise glycerol production. The results showed that a one-stage reactive coupling achieved a solketal yield of 39.5 ± 5.1% and FAME yield of 99% after 8 h at 10:7:1 of methanol: acetone: oil molar ratio. However, based on these results and the predictions of the kinetic model developed, a "two-stage" reactive coupling process was investigated, in which some of the acetone was added later in the process. The two-stage process was demonstrated to achieve up to 98 ± 0.5% FAME and 82 ± 4% solketal yields under the same operating conditions.

Publication metadata

Author(s): Al-Saadi LS, Eze VC, Harvey AP

Publication type: Article

Publication status: Published

Journal: Green Processing and Synthesis

Year: 2019

Volume: 8

Issue: 1

Pages: 516-524

Print publication date: 28/01/2019

Online publication date: 25/05/2019

Acceptance date: 11/03/2019

Date deposited: 24/06/2019

ISSN (print): 2191-9542

ISSN (electronic): 2191-9550

Publisher: De Gruyter


DOI: 10.1515/gps-2019-0020


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