Soybean biodiesel methyl esters, free glycerin and acid number quantification by 1H nuclear magnetic resonance spectroscopy

被引：12

作者：

Coral, Natasha ^{[1
]}

Rodrigues, Elizabeth ^{[2
]}

Rumjanek, Victor ^{[3
]}

Zamian, Jose Roberto ^{[1
]}

da Rocha Filho, Geraldo Narciso ^{[1
]}

Ferreira da Costa, Carlos Emmerson ^{[1
]}

机构：

[1] UFPA, Fac Quim, LCO, BR-66075110 Belem, Para, Brazil

[2] ICEN, BR-66075110 Belem, Para, Brazil

[3] Univ Fed Rural Rio de Janeiro, Dept Quim, BR-23890000 Rio de Janeiro, Brazil

来源：

MAGNETIC RESONANCE IN CHEMISTRY | 2013年 / 51卷 / 02期

关键词：

NMR; H-1; soybean oil; transesterification; biodiesel; methyl esters; free glycerin; acid number; RAPESEED OIL; TRANSESTERIFICATION; H-1-NMR; YIELD;

D O I：

10.1002/mrc.3913

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Production of alternative fuels, such as biodiesel, from transesterification of vegetable oil driven by heterogeneous catalysts is a promising alternative to fossil diesel. However, achieving a successful substitution for a new renewable fuel depends on several quality parameters. H-1 NMR spectroscopy was used to determine the amount of methyl esters, free glycerin and acid number in the transesterification of soybean oil with methanol in the presence of hydrotalcite-type catalyst to produce biodiesel. Reaction parameters, such as temperature and time, were used to evaluate soybean oil methyl esters rate conversion. Temperatures of 100 to 180 degrees C and times of 20 to 240 min were tested on a 1 : 12 molar ratio soybean oil/methanol reaction. At 180 degrees C/240 min conditions, a rate of 94.5 wt% of methyl esters was obtained, where free glycerin and free fatty acids were not detected. Copyright (c) 2012 John Wiley & Sons, Ltd.

引用

页码：69 / 71

页数：3