Preparation of Biodiesel Using Carbon Nanotubes Based Solid Acid Catalyst
Multi-walled carbon nanotubes (MWCNTs) have many potential applications, including a number of promising catalytic applications. Various pretreatment techniques change the physical and chemical structure of the MWCNTs. The raw MWCNTs were treated by Nitric acid and hydrochloric acid firstly, and then the pretreated MWCNTs were modified by sulphuric acid to introduce functional groups -SO3H, and the result products were named as s-MWCNTs. They were characterized by TEM, FT-IR and TGA. The preparation condition of s-MWCNTs has been investigated. Oleic acid was selected as the model of the high acid value oil. The use of s-MWCNTs catalyst in the esterification reaction of oleic acid and methanol to synthesis methyl oleate has been studied. The reaction conditions were optimized by single-factor experiment on reaction temperature, reaction time, catalyst/oleic acid mass ratio, and methanol/oleic acid molar ratio. The optimal reaction conditions were reaction temperature 135℃, catalyst/oleic acid mass ratio 1.2wt％, the molar ratio of methanol/oleic acid 11:1 and reaction time 5 h, and the methyl oleate yield can reach 96.7％. The s-MWCNTs exhibited both high activity and good stability in the preparation of biodiesel.
MWCNTs Sulfonation Acid catalysis Esterification Biodiesel
Xue-hai FAN Li-jing GAO Guomin XIAO
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China
国际会议
南京
英文
92-101
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）