TRANSESTERIFICATION OF JATROPHA CURCAS L OIL TO BIODIESEL CATALYZED BY SOLID BASIC CATALYST
Owing to its high acid content, conventional homogenous basic catalytic (e.g., NaOH) production of bio-diesel is ineffective and will cause soap formation during transesterification of Jatropha oil. On the other hand, homogenous catalysts are hard to separate for reuse. In this work, Hydrotalcite with Mg/Al molar ratio of 3/1 was synthesized by coprecipitation method using urea as precipitator and subsequent microwave-hydrothermal treatment and calcination at 773 K. Calcined hydrotalcite particles were microparticles as characterized by Powder X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Atomic Force Microscope (AFM). Because of their strong basicity, calcined hydrotalcite microparticles were used for the catalytic transesterification of Jatropha oil containing 5-12 acid values to biodiesel. The reaction conditions, such as methanol/oil molar ratios, catalyst concentrations and reaction temperatures were performed with the solid basic catalyst. It is found that at 70 W ultrasonic power, when methanol reacted with the oil (4:1 molar ratio) mixed with 1.0％ hydrotalcite basic catalyst (w/w of oil) at 318 K for 1.5 h, a maximum ester yield of 94.2％ was achieved. It can be concluded that calcined hydrotalcite solid catalyst is effective for the production of biodiesel from plant oil with high acid values.
Jatropha curcas L oil transesterification hydrotalcite ultrasonic reactor microparticles
Xin DENG Zhen FANG Yun-hu LIU
Biomass Group,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,88 xuefulu,Kunming,Yunnan province,650223,China
国际会议
广州
英文
223-231
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）