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One-Pot Synthesis of Biodiesel from Acid Oil Using a Switchable Solvent, 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU), as a Bifunctional Catalyst

journal contribution
posted on 2023-06-14, 06:29 authored by Hoang Chinh Nguyen, Thanh Truc Pham, Nguyen Phuong Nguyen, Beyene Hagos Aregawi, Chun-Chong Fu, Colin J Barrow, Chia-Hung Su, Shao-Jung Wu, Horng-Yi Juan
Biodiesel is a promising alternative to petrodiesel, but its production from acid oils retains several technical challenges. Therefore, this study developed a new approach involving 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-catalyzed one-pot reaction (simultaneous esterification-transesterification) to produce biodiesel with enhanced reaction efficiency. The reaction was performed under water removal conditions and optimized using response surface methodology to maximize the biodiesel yield. The optimal conditions for the one-pot reaction had a reaction time of 2.73 h, temperature of 143°C, methanol:oil molar ratio of 24.3 : 1, and DBU loading of 30.1%. Under the optimal conditions, maximum total biodiesel of 97.1% was obtained. DBU could be repeatedly used for at least 5 cycles to yield over 91% biodiesel. This study suggests that DBU efficiently catalyzed esterification and transesterification simultaneously and the DBU-catalyzed one-pot reaction is an efficient method for biodiesel production from high-free-fatty acid oils.

History

Journal

International Journal of Energy Research

Volume

2023

Article number

2171897

Pagination

1-12

Location

London, Eng.

ISSN

0363-907X

eISSN

1099-114X

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Editor/Contributor(s)

Basumatary S

Publisher

Hindawi Press