Evaluation of the dielectric properties of biodiesel fuels produced from different vegetable oil feedstocks through electrochemical impedance spectroscopy

被引：34
作者：
M'Peko, Jean-Claude [1 ]
Reis, Diany L. S. [2 ]
De Souza, Jose E. [2 ]
Caires, Anderson R. L. [2 ]
机构：
[1] Univ Sao Paulo, Inst Fis Sao Carlos, Grp Crescimento Cristais & Mat Ceram, BR-13560970 Sao Carlos, SP, Brazil
[2] Fundacao Univ Fed Grande Dourados, Grp Opt Aplicada, Fac Ciencias Exatas & Tecnol, BR-79804970 Dourados, MS, Brazil
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 22期
基金：
巴西圣保罗研究基金会;
关键词：
Biodiesel; Vegetable oil; Impedance spectroscopy; Dielectric properties; Viscosity; DIESEL/BIODIESEL BLENDS; FLUORESCENCE;
D O I：
10.1016/j.ijhydene.2013.05.086
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Biodiesel fuels were prepared front different vegetable oil sources (canola, soybean, sunflower, and corn) and studied through electrochemical impedance spectroscopy. The dielectric constant from these biofuels evidenced no important dependence on feedstock, suggesting basically no change in fuels' polarity from varying the raw materials. In a different way, huge variations of the electrical resistivity and relaxation frequency were found when comparing among the studied biodiesels. Our findings demonstrate that these variations are Closely associated with changes in the biodiesel viscosity, which is known to modulate charge mobility and was feedstock dependent. Accordingly, the impedance spectroscopy is here revealed to be a sensitive, alternative and reliable analytical approach for distinguishing among different feedstock-related biodiesels and monitoring certain biofuels' properties, like viscosity and interrelated parameters, usually connected with fatty acid structural profiles in biodiesel fuels. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：9355 / 9359
页数：5
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