氧化前后生物柴油的红外和紫外光谱分析  

FT-IR and UV Spectral Analysis of Biodiesel Before and After Oxidation

作　　者：吴江[1] 陈波水[1] 方建华[1] 王九[1] 

机构地区：[1]后勤工程学院油料应用与管理工程系,重庆401311

出　　处：《石油学报（石油加工）》2014年第2期262-265,共4页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(51375491);重庆市自然科学基金项目(cstc2011jjA90020);教育部"新世纪优秀人才支持计划"项目(NCET-04-1002);重庆市"高校创新团队建设计划"项目资助

摘　　要：利用红外光谱和紫外光谱分析了菜籽油生物柴油、大豆油生物柴油及餐饮废油生物柴油中不饱和脂肪酸甲酯(FAME)在氧化过程中分子构型的变化。结果表明,生物柴油的氧化安定性与其脂肪酸甲酯的组成密切相关,即不同来源的生物柴油的氧化安定性不同。在氧化过程中,不饱和脂肪酸甲酯分子中的双键会发生顺-反异构化,并生成共轭双键;多双键不饱和脂肪酸甲酯含量越高,共轭双键生成量越多,生物柴油的氧化安定性也越差。The structural transformation of unsaturated fatty acid methyl ester （FAME） of rapeseed oil derived biodiesel（RME）, soybean oil derived biodiesel（SME） and waste oil based biodiesel （WME）, was analyzed by FT-IR and UV. The results demonstrated that the oxidation behaviors of biodiesels were closely related to their compositions of FAMEs, meaning that biodiesels from different origins exhibited different oxidation resistance. During oxidation process of biodiesel, cis-trans isomerization occurred in the unsaturated FAME molecules and conjugated double-bond was produced. The higher the mass fraction of unsaturated FAME with multi-double bonds in biodiesel and the more the conjugated double bonds, the poorer the oxidation resistance of biodiesel.

关 键 词：生物柴油 氧化 光谱分析 

分 类 号：TK6[动力工程及工程热物理—生物能]