首页> 外文期刊>Energy & fuels >Physicochemical Characterization of Commercial Biodiesel/Diesel Blends and Evaluation of Unconventional Spectroscopic Vibrational Techniques in the Monitoring of Their Oxidation and Hydrolysis during Storage
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Physicochemical Characterization of Commercial Biodiesel/Diesel Blends and Evaluation of Unconventional Spectroscopic Vibrational Techniques in the Monitoring of Their Oxidation and Hydrolysis during Storage

机译:商用生物柴油/柴油混合物的理化表征和非常规光谱振动技术在存储过程中氧化和水解监测中的评估

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摘要

A series of physicochemical studies performed on Brazilian commercial Bx (0%, 7%, 20%, and 100% soybean/ tallow biodiesel) mixtures in SIO and 5500 oil diesel, as well as the performance of two rapid and still underexplored techniques, namely, FTIR-HATR and Raman spectroscopies, to evaluate the hydrolysis and oxidative stability of these blends are reported. The addition of biodiesel to diesel affects negatively the aging resistance of the resulting blends. 5500 blends are more acidic than SIO blends, in accordance with the higher water content of the former. Rancimat accelerated oxidative stability tests showed that, as expected, the induction times of B7 and B20 samples are greater than that of B100, independent of the sulfur content of the diesel. The practical use of FTIR-HATR to characterize the mixtures' degradation stage is conditioned by the fact that there are two chemical contributions for the studied band. On the other hand, Raman spectroscopy represents a very suitable spectroscopic probe for unsaturations in the fatty acids chains of biodiesel. Since FTIR-HATR and Raman spectroscopies do not require any sample preparation, are fast and quite low cost techniques, and cause low impact to the environment, further attention must be paid to their use in the analysis of biodiesel-containing fuels degradation.
机译:对巴西商业Bx(0%,7%,20%和100%大豆/牛脂生物柴油)混合物在SIO和5500油柴油中的混合物进行了一系列理化研究,以及两种仍在探索中的快速技术的性能,即,FTIR-HATR和拉曼光谱学,以评估这些混合物的水解和氧化稳定性的报道。向柴油中添加生物柴油会对所得混合物的耐老化性产生负面影响。 5500混合物的酸度比SIO混合物高,这是因为前者的水含量较高。 Rancimat加速氧化稳定性测试表明,正如预期的那样,B7和B20样品的诱导时间大于B100的诱导时间,而与柴油中的硫含量无关。 FTIR-HATR表征混合物降解阶段的实际应用取决于以下事实:所研究的谱带有两种化学成分。另一方面,拉曼光谱表示非常适合生物柴油的脂肪酸链中的不饱和度的光谱探针。由于FTIR-HATR和拉曼光谱仪不需要任何样品前处理,是快速且成本低廉的技术,并且对环境的影响很小,因此在分析含生物柴油燃料的降解中必须进一步注意它们的使用。

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  • 来源
    《Energy & fuels》 |2016年第10期|8399-8409|共11页
  • 作者单位

    Pontif Catholic Univ Rio de Janeiro PUCRio, Dept Chem, Rua Marques de Sao Vicente,225 Gavea, BR-22451900 Rio De Janeiro, RJ, Brazil|Ipiranga Prod Petr SA, Rua Monsenhor Manuel Gomes 140, BR-20931670 Rio De Janeiro, RJ, Brazil;

    Pontif Catholic Univ Rio de Janeiro PUCRio, Dept Chem, Rua Marques de Sao Vicente,225 Gavea, BR-22451900 Rio De Janeiro, RJ, Brazil;

    Ipiranga Prod Petr SA, Rua Monsenhor Manuel Gomes 140, BR-20931670 Rio De Janeiro, RJ, Brazil;

    Pontif Catholic Univ Rio de Janeiro PUCRio, Dept Chem, Rua Marques de Sao Vicente,225 Gavea, BR-22451900 Rio De Janeiro, RJ, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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  • 入库时间 2022-08-18 00:39:59

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