摘要
以小桐子生物柴油为样品对其氧化前后的运动黏度变化和成分变化进行研究。结果表明,小桐子生物柴油的氧化安定性诱导期为4.75h;氧化前后样品的运动黏度均随温度升高而降低,并且氧化后的样品比氧化前样品的运动黏度有所增加,温度较高时,温度变化不再是引起运动黏度变化的主导因素,拟合数据得到氧化前后的"温度-运动黏度"经验方程;氧化后的小桐子生物柴油生成较多的醇、醛、酸、酮等物质,这些物质中的极性基团与脂肪酸甲酯的酯基之间生成电偶极子和氢键,增强了分子内聚力,导致氧化后的小桐子生物柴油运动黏度增大。
The kinetic viscosity and composition changes of Jatropha curcas biodiesel before and after oxidation were studied.The results showed that the induction period of oxidation stability of Jatropha curcas biodiesel was 4.75 h.The kinematic viscosity of the samples before and after oxidation decreased with the increase of temperature,and the kinematic viscosity of the sample after oxidation increased compared with that before oxidation.When the temperature was higher,the change of temperature was no longer the dominant factor causing the change of kinematic viscosity,fitting the data to obtain the 'temperature-kinematic viscosity' empirical equation before and after oxidation.The oxidized Jatropha curcas biodiesel produced more alcohols,aldehydes,acids,ketones and other substances.These substances in the polar groups and fatty acid methyl ester ester-based generate dipoles and hydrogen bonds,enhanced molecular cohesion,resulting in increment of Jatropha curcas biodiesel kinematic viscosity after oxidation.
作者
倪梓皓
李法社
韩刚
王霜
隋猛
王文超
陈德福
Ni Zihao;Li Fashe;Han Gang;Wang Shuang;Sui Meng;Wang Wenchao;Chen Defu(Kunming University of Science and Technology,Faculty of Metallurgical and Energy Engineering,Kunming 650093;Engineering Research Center of Metallurgical Energy Conservation & Emission Reduction,Ministry of Education,Kunming University of Science and Technology,Kunming 650093)
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2019年第7期78-83,共6页
Journal of the Chinese Cereals and Oils Association
基金
国家自然科学基金(51766007)
NSFC云南联合基金(U1602272)
省部共建复杂有色金属资源清洁利用国家重点实验室自设项目(CNMRCUTS1704)
云南省自然科学基金(2018FB092)
关键词
生物柴油
氧化安定性
运动黏度
成分分析
biodiesel
oxidation stability
kinematic viscosity
composition analysis
