【摘要】 采用欧盟标准方法EN14103测定了菜籽油生物柴油及国内常见的几种生物柴油在加速氧化前后的脂肪酸甲酯分布变化,结果表明亚油酸甲酯、亚麻酸甲酯在生物柴油中的含量是影响生物柴油氧化安定性的决定因素。同时从生物柴油氧化反应的表观活化能角度进一步研究生物柴油的氧化反应,试验结果表明:不同氧化安定性的生物柴油具有不同的氧化反应表观活化能;抗氧剂的加入可以有效提高生物柴油氧化反应的表观活化能,从而起到延缓生物柴油氧化的作用。更多还原

【Abstract】 The distributions of fatty acid methyl esters in several biodiesel fuels prior and post to accelerated oxidation were determined by EN14103 standard method,and the results showed that the contents of linoleic acid methyl ester and linolenic acid methyl ester in biodiesel were the key factors affecting the oxidative stability of biodiesel.The oxidation of biodiesel was further studied through determining the apparent activation energy of biodiesel oxidation.Results showed that the apparent activation energies of oxidation reactions for biodiesel fuels having various oxidative stabilities were varied;adding antioxidant into biodiesel could increase the apparent activation energy of oxidation reactions significantly,as a result,the oxidation of biodiesel was postponed and its oxidative stability improved.更多还原