Preparation of Ca- and Na-Modified Activated Clay as a Promising Heterogeneous Catalyst for Biodiesel Production via Transesterification

Applied Sciences

Zhangfa Tong¹  Kun Liu¹  Xueling Hu²  Yaseen Muhammad³  Hanbing Zhang⁴  Sishan Yu⁴  Tian Fu⁴  Yue Wang⁴ 

[1] Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;Institute of Biomanufacturing Technology, Guangxi Institute of Industrial Technology (GIIT), Nanning 530200, China;Institute of Chemical Sciences, University of Peshawar, Peshawar 25120, Pakistan;School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China;

关键词: biodiesel;    Jatropha oil;    transesterification;    modified clay;    heterogeneous catalyst;   

DOI  :  10.3390/app12094667

来源: DOAJ

【 摘 要 】

For efficient biodiesel production, an acid-activated clay (AC) modified by calcium hydroxide and sodium hydroxide (CaNa/AC) was prepared as a catalyst. CaNa/AC and Na/AC were characterized by Hammett indicators, CO₂-TPD, FT-IR, XRD, and N₂ adsorption techniques. The influence of catalyst dose, reaction temperature, methanol/oil molar ratio, and reaction time on the transesterification of Jatropha oil was studied. Due to the introduction of calcium, CaNa/AC displayed a higher activity and stability, thereby achieving an oil conversion of 97% under the optimal reaction conditions and maintaining over 80% activity after five successive reuses. The reaction was accelerated as the temperature rose, and the apparent activation energy of CaNa/AC was 75.6 kJ·mol⁻¹. The enhanced biodiesel production by CaNa/AC was ascribed to the increase in active sites and higher basic strength. This study presents a facile and practical method for producing biodiesel on large-scale operation.

【 授权许可】

Unknown