Naureen Rizwana, Tariq Muhammad, Yusoff Ismail, Chowdhury Ahmed Jalal Khan, Ashraf Muhammad Aqeel
Department of Geology, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Department of Chemistry, Bahauddin Zakariya University, 60000 Multan, Pakistan.
Saudi J Biol Sci. 2015 May;22(3):332-9. doi: 10.1016/j.sjbs.2014.11.017. Epub 2014 Nov 24.
Methyl esters from vegetable oils have attracted a great deal of interest as substitute for petrodiesel to reduce dependence on imported petroleum and provide an alternate and sustainable source for fuel with more benign environmental properties. In the present study biodiesel was prepared from sunflower seed oil by transesterification by alkali-catalyzed methanolysis. The fuel properties of sunflower oil biodiesel were determined and discussed in the light of ASTM D6751 standards for biodiesel. The sunflower oil biodiesel was chemically characterized with analytical techniques like FT-IR, and NMR ((1)H and (13)C). The chemical composition of sunflower oil biodiesel was determined by GC-MS. Various fatty acid methyl esters (FAMEs) were identified by retention time data and verified by mass fragmentation patterns. The percentage conversion of triglycerides to the corresponding methyl esters determined by (1)H NMR was 87.33% which was quite in good agreement with the practically observed yield of 85.1%.
植物油甲酯作为石油柴油的替代品，因其能减少对进口石油的依赖，并提供一种具有更良好环境特性的替代且可持续的燃料来源而备受关注。在本研究中，通过碱催化甲醇解的酯交换反应由向日葵籽油制备生物柴油。根据生物柴油的ASTM D6751标准，测定并讨论了向日葵油生物柴油的燃料特性。采用傅里叶变换红外光谱（FT-IR）和核磁共振（NMR）（氢谱（¹H）和碳谱（¹³C））等分析技术对向日葵油生物柴油进行化学表征。通过气相色谱 - 质谱联用（GC-MS）测定向日葵油生物柴油的化学成分。通过保留时间数据鉴定各种脂肪酸甲酯（FAMEs），并通过质谱碎裂模式进行验证。通过¹H NMR测定甘油三酯向相应甲酯的转化率为87.33%，这与实际观察到的85.1%的产率相当吻合。
