Recovery of byproducts from the rice milling industry for biofuel production

• Type: Article in International Conference Proceedings Book
• Date: 2019-09-04

Authors

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

Indexing

Scopus

Other information

DOI: 10.1201/9780429289798

Abstract (EN): In this study, the efficiency of enzymatic esterification and homogenous acid esterification for the reduction of Free Fatty Acid (FFA) content of acid rice bran oil (47 mg KOH g−1 ) was studied. Further, alkaline transesterification of the pretreated 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 respectively 65◦ C and 45◦ C, using 2 wt.% and 4 wt.% of H2 SO4 as catalyst and 9:1 methanol:oil molar ratio. Enzymatic esterification was performed at 35◦ C using a 6:1 molar ratio of methanol:oil and 5 wt.% of catalyst. Homogenous acid esterification allowed to achieve the highest acid value reduction (92%), although enzymatic pretreatment alone allowed to obtain the highest FAME content (86 wt.%) compared to acid catalyzed process (41 wt.%). The obtained results show potential of this alternative raw material for bioenergy purposes. © 2020 Taylor & Francis Group, London, UK.

Language: English

Type (Professor's evaluation): Scientific

Notes: E. T. Costa, M. F. Almeida, M. C. Alvim-Ferraz, J. M. Dias (2019), Recovery of byproducts from the rice milling industry for biofuel production, Wastes: Solutions, Treatments and Opportunities III (pp. 326-332). Vilarinho, Castro, Gonçalves & Lopes (eds.). London: Taylor & Francis Group, ISBN: 978-0-367-25777-4

No. of pages: 7