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分析计量与标准化
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
热重、核磁共振与气-质联用三种方法
对比分析生物柴油的浓度
石文英李红宾侯宏祥
1.河南工程学院纺织学院2.河南省新乡市新利净化技术有限公司
2016
摘要生物柴油作为一种绿色的可再生能源,其生产越来越受到世界各国的重视,而建立一种快捷、准确、经济地测定其浓度的检测方法至关重要。通过实验结果,对比分析了热重、核磁共振和气-质联用3种方法测定生物柴油浓度的优缺点。热重方法可以准确地测定生物柴油的浓度,而且不需要使用溶剂和标样,方法快捷、经济可行;核磁共振方法简单、快捷、精确,但在测试中需要使用氛代试剂,测试费用较高;气-质联用方法虽然可以区分各种脂肪酸甲酯、甘油和甘油三酯,但是该方法只适合定性分析。
关键词生物柴油热重核磁共振气-质联用生物柴油浓度中图分类号:TQ645
文献标志码:A
DOI:10.3969/j.issn.1007-3426.2016.05.017
Contrastiveanalysisofthebiodieselconcentration
byTG,HNMRand GC-MS
Shi Wenying,Li Hongbin',Hou Hongxiang
(l. School of Textiles Engineering, Henan Institute of Engineering , Zhengz hou 450007, China)
(2. Xinli Purification Co. Ltd, Xinxiang 453400, China)
Abstract: Biodiesel as a kind of green renewable energy has attracted more and more attention in the world. It is very important to establish a fast, accurate and economical method for determining the concentration of biodiesel . The advantages and disadvantages of three methods for determining the contents of biodiesel were analyzed by the experimental results . Thermogravimetry can accurately determine the content of biodiesel and it does not require the use of solvent and standard sample . The method is fast, economical and feasible. Nuclear magnetic resonance is a simple, fast and accurate method ,but the cost of test is higher because the deuterated reagent is used in the test . Although gas mass spectrometry can be used to distinguish various fatty acid methyl esters, glycerol and triglyceride ,it is only suitable for qualitative analysis .
Key words: biodiesel, thermogravimetry, nuclear magnetic resonance, gas-mass spectrometry, biodiesel concentration
随着石化资源日益减少,人们的环保意识逐渐增
强,迫切需要寻找新型可替代的能源,而生物柴油作为一种绿色的可再生能源应运而生"。生物柴油又称脂肪酸甲酯,是以植物果实、种子、植物导管乳汁或动物
脂肪油、废弃的食用油等作为原料,与醇类(甲醇、乙醇等)经过酯交换反应或酯化反应获得2-4,是优质的石油、柴油代用品。生物柴油具有独特的环保优势:碳十六值高,润滑性好,可生物降解,可减少SO、CO和
基金项目:国家自然基金资助项目“基于生物柴油制备的磺化聚合物复合催化膜研制及膜接触器动力学研究”(51403052);纺织新产品开发河南省工程实验室开放基金项目(GCSYS201504);河南省高等学校重点科研项目“季胺接枝聚矾/非织造布复合膜的制备及在生物些油虫的应用研究"(16A480005)。
作者简齐磐英(1984一),女,博士,讲师,研究方向为催化膜及生物柴油制备。E-mail:shiwenyinggg@126.com