期刊
FUEL
卷 304, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.121463
关键词
Biodiesel; Heterogeneous magnetic acid catalyst; Transesterification; Waste cooking oil
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]
In this study, a heterogeneous magnetic acid catalyst MoO3/SrFe2O4 was synthesized and applied in transesterification of waste cooking oil, providing an environmentally friendly approach to biodiesel production. By developing a mathematical model and optimizing reaction conditions, a high ester conversion rate of 95.4% was achieved with excellent catalyst reusability and stability demonstrated through five runs.
In this study, a heterogeneous magnetic acid catalyst MoO3/SrFe2O4, composed of molybdenum oxide (MoO3) supported on strontium ferrite (SrFe2O4), was synthesized and applied in the transesterification of waste cooking oil. The catalyst was characterized by acid-base titration method in order to determine Surface acidity, Thermogravimetric analysis (TGA/DTGA), X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Energy dispersion X-ray spectroscopy (EDX) and Vibrating sample magnetometry (VSM) techniques. A central composite design of centered face 2(4) and a mathematical model were developed in order to describe the behavior of the ester content as a function of the independent variables reaction temperature, alcohol:oil molar ratio, catalyst dosage and reaction time. The mathematical model (R-2 = 0.9900) was validated and showed a relative error below 5% between the experimental and predicted values. Using linear regression methods and response surface methodology the conditions of biodiesel synthesis reaction were optimized and 95.4% conversion into esters was obtained from the use of 164 degrees C reaction temperature, 40:1 alcohol:oil molar ratio, 10% catalyst dosage and 4 h reaction time. The catalyst was recovered by an external conventional magnet and showed high reusability and stability, such the ester content remains above 84% after five runs. The development of MoO3/SrFe2O4 as a novel heterogeneous magnetic acid catalyst would provide an environmentally friendly approach to biodiesel production.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据