Acid esterification vs glycerolysis of acid oil soapstock for FFA reduction

• Type: Chapter or Part of a Book
• Date: 2018

Authors

Emanuel Costa (Author) Other; Mariana Cruz (Author) Other; Conceição Alvim Ferraz (Author) FEUP; Manuel Fonseca Almeida (Author) FEUP; Joana Dias (Author) FEUP

Book

Title: Book of proceedings of Wastes: Solutions, Treatments and Opportunities II

Pages: 287-292

ISBN: 978-1-138-19669-8

Publisher: Taylor & Francis

Indexing

Scopus

Other information

Abstract (EN): In this study, the efficiency of esterification vs glycerolysis for the reduction of Free Fatty Acid (FFA) content of acid soapstock oil (128.8 mg KOH g−1) was studied. Further, alkaline transesterification of the pre-treated oil mixed with sunflower oil (to achieve FFA content <2%) was conducted to maximize Fatty Acid Methyl Esters (FAME) production. Homogeneous acid esterification was conducted at 65°C, using 2.0 wt% H2SO4 as catalyst and 9:1 molar ratio of methanol to oil. Glycerolysis was performed at 200°C using a 6:1 molar ratio of glycerol:oil. Both reactions lasted 6 h. Final acid value of the product was around 10 mg KOH g−1 for both processes, showing negligible differences between them. After transesterification of the mixtures it was possible to obtain biodiesel with around 90% FAME content, thus showing potential for the recovery of such waste material. © 2018 Taylor & Francis Group, London, UK.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6