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Journal:Biomass and Bioenergy

Key Words:Biodiesel; Transesterification; Response Surface Methodology; Montmorillonite; Barium; Zinc

Abstract:Acid-base bifunctional catalysts have garnered increasing attention due to their excellent adaptability to low-quality oils. The montmorillonite supported bimetallic catalysts are successfully synthesized by wet impregnation method, and the effects of catalyst in transesterification of the acidified palm oil to produce biodiesel are evaluated. Various characterization methods of XRD, CO2/NH3-TPD BET and SEM-EDS etc. are used to evaluate the performances of the catalyst. BET analysis shows that the pore volume of the catalyst is 0.014 m3 /g and the pore size is 15.29 nm, which proves the excellent pore properties of the catalyst. The transesterification parameters are optimized by the response surface method of central composite design, where the maximum biodiesel yield of 96.1% was obtained at the alcohol to oil ratio of 15.5:1, catalyst dosage of 5.5 wt% and transesterification temperature of 163.0 °C. After four cycles of reuse, the biodiesel yield of the catalyst remained at 78.7%. In the acid resistance test, the catalyst still achieved a yield of 81.1% when 10 wt.% oleic acid was added, demonstrating its excellent acid tolerance. The synthetic biodiesel is certified to be compliant with the ASTM D 6751 standard.

All the Authors:Yang Xu,Sitong Liu,Jie Zhu,Zihao Yang,Jie Geng,Yujiao Zhang,Yanan Hao

First Author:Jisen Liu

Indexed by:Journal paper

Correspondence Author:Shengli Niu* (* the corresponding author)

Discipline:Engineering

First-Level Discipline:Power Engineering and Engineering Thermophysics

Document Type:J

Translation or Not:no

Date of Publication:2025-05-01

Included Journals:SCI