纳米固体碱CaO-ZrO_2催化红麻籽油制备生物柴油  

Preparing Biodiesel from Flaxseed Oil Using CaO-ZrO_2 Solid Base Catalyst

作　　者：陈杰博[1] 苏金为[1] 祁建民[1] 陈新香[1] 陈亮[1] 

机构地区：[1]福建农林大学生命科学学院,福州350002

出　　处：《应用化学》2011年第3期267-271,共5页Chinese Journal of Applied Chemistry

基　　金：福建省科技厅计划项目(2008N006)

摘　　要：采用溶胶-凝胶法制备了CaO摩尔分数为10%～50%的CaO-ZrO2系列纳米催化剂,将其用于催化红麻籽油制备生物柴油,通过CO2-TPD、XRD和TEM等测试技术对催化剂的碱性、结构和表面形貌进行表征。结果表明,CaO摩尔分数低于30%时,CaO与ZrO2形成连续固溶体,催化剂具有良好的热稳定性能,粒径为10～20 nm。催化实验表明,当CaO摩尔分数为30%时,CaO-ZrO2催化剂具有最好的催化活性,甲醇与红麻籽油的摩尔比为12∶1、催化剂为油料质量比的2.5%、反应时间3 h时,最高转化率可达到93.2%。CaO-ZrO2 nanoparticles with CaO molar fraction ranging from 10% to 50% were prepared by the sol-gel method and their catalytic performances were evaluated in biodiesel production from flaxseed oil; XRD, CO2-TPD, and TEM were employed for the catalyst characterization. The results indicate that when CaO molar fraction was lower than 30%, the samples form CaO-ZrO2 homogeneous solid solution, which possesses good thermal stability and the grain diameter is 10 -20 nm. The experimental results show that the highest catalytic activity can be achieved when CaO molar fraction was 30%. The yield of conversion could reach 93.2% when the reaction conditions were optimized for the transesterification of flaxseed oil. The dosage （ mass ratio） of catalyst to oil was 2. 5%, the reaction temperature and time were 65℃ and 2 h respectively, and the molar ratio of methanol to oil is 12： 1.

关 键 词：CaO—ZrO2 固体碱 红麻籽油 生物柴油 

分 类 号：O643.3[理学—物理化学]