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

共 13 条

[1]

Carneiro P.I. B., 2005, ANN MAGN RESON, V4, P64

[2] HYDROTALCITE-TYPE ANIONIC CLAYS: PREPARATION, PROPERTIES AND APPLICATIONS [J].

Cavani, F. ;

Trifiro, F. ;

Vaccari, A. .

CATALYSIS TODAY, 1991, 11 (02) :173-301

[3] Ethanolysis of rapeseed oil - Distribution of ethyl esters, glycerides and glycerol between ester and glycerol phases [J].

Cernoch, Michal ;

Hajek, Martin ;

Skopal, Frantisek .

BIORESOURCE TECHNOLOGY, 2010, 101 (07) :2071-2075

[4] H-1 NUCLEAR-MAGNETIC-RESONANCE DETERMINATION OF THE YIELD OF THE TRANSESTERIFICATION OF RAPESEED OIL WITH METHANOL [J].

GELBARD, G ;

BRES, O ;

VARGAS, RM ;

VIELFAURE, F ;

SCHUCHARDT, UF .

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, 1995, 72 (10) :1239-1241

[5] The transesterification of rapeseed and waste sunflower oils: Mass-transfer and kinetics in a laboratory batch reactor and in an industrial-scale reactor/separator setup [J].

Klofutar, B. ;

Golob, J. ;

Likozar, B. ;

Klofutar, C. ;

Zagar, E. ;

Poljansek, I. .

BIORESOURCE TECHNOLOGY, 2010, 101 (10) :3333-3344

[6] Analysis of oxidized biodiesel by 1H-NMR and effect of contact area with air [J].

Knothe, G .

EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY, 2006, 108 (06) :493-500

[7] Efficient production of biodiesel from high free fatty acid-containing waste oils using various carbohydrate-derived solid acid catalysts [J].

Lou, Wen-Yong ;

Zong, Min-Hua ;

Duan, Zhang-Qun .

BIORESOURCE TECHNOLOGY, 2008, 99 (18) :8752-8758

[8] Nuclear magnetic resonance spectroscopic analysis of ethyl ester yield in the transesterification of vegetable oil: an accurate method for a truly quantitative analysis [J].

Mambrini, Giovanni Pimenta ;

Ribeiro, Caue ;

Colnago, Luiz Alberto .

MAGNETIC RESONANCE IN CHEMISTRY, 2012, 50 (01) :1-4

[9]

Reda SY, 2008, REV ANAL, V34, P86

[10] CATALYTIC REACTIONS BY THERMALLY ACTIVATED, SYNTHETIC, ANIONIC CLAY-MINERALS [J].

REICHLE, WT .

JOURNAL OF CATALYSIS, 1985, 94 (02) :547-557

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