摘要
采用固体酸催化酯交换方法,研究了由麻疯树油制备脂肪酸甲酯(生物柴油)过程中催化剂类型及工艺条件对生物柴油产率和产品组成的影响.采用沉淀法制得两种固体酸催化剂ZrO2-SO42-和K4Zn4[Fe(CN)6]3,利用XRD,FT-IR,BET和元素分析仪表征了固体酸结构和性质.以麻疯树油为原料油,分别比较了原料油的酸值及反应温度对2种催化剂的影响,利用气相色谱-质谱联用分析仪分析了产物的组成.结果表明,ZrO2-SO42-和K4Zn4[Fe(CN)6]3催化高酸值麻疯树油时,ZrO2-SO42-容易失活,甲酯收率降为84%;以Fe-Zn为催化剂,甲酯收率达到93%,使用5次后甲酯收率仍达90%.
Transesterification of Jatropha curcas oil was carried out in the presence of solid acid, the effects of types of catalysts and reaction conditions on the bio-diesel yields and the components in the process of the preparation of methyl esters （bio-diesel） were examined. Solid acid catalysts ZrO2-SO4^2- and K4Zn4[Fe（CN）6]3 were prepared with precipitation. Their structures and characteristics identified by XRD, FT-IR, BET and elemental analysis were compared. Their catalytic activities changed with acid value and reaction temperature. The detail components of the bio-diesel production were analyzed by GC-MS. The results showed that the ZrO2-SO4^2- lost its catalytic activity in high acid value Jatropha curcas oil. The yield of methyl ester declined to 84%. Otherwise, K4Zn4[Fe（CN）6]3 remained its good catalytic activity and stability. The yield of methyl ester was 93%. After it was used five times, the yield of methyl ester still reached 90%.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2008年第6期1167-1172,共6页
The Chinese Journal of Process Engineering
基金
国家'十一五'科技支撑基金资助项目(编号:2006BAE01A07-10)
国家高技术研究发展计划(863)基金资助项目(编号:2006AA100204)
关键词
生物柴油
固体酸
麻疯树油
酯交换
bio-diesel
solid acid
Jatropha curcas oil
transesterification
