Comprehensive near infrared study of Jatropha oil esterification with ethanol for biodiesel production

被引：10

作者：

de Oliveira, Alianda Dantas ^{[1
]}

de Sa, Ananda Franco ^{[2
]}

Pimentel, Maria Fernanda ^{[2
]}

Pacheco, Jose Geraldo A. ^{[2
]}

Pereira, Claudete Fernandes ^{[1
]}

Larrechi, Maria Soledad ^{[3
]}

机构：

[1] Univ Fed Pernambuco, Dept Quim Fundamental, Av Jornalista Anibal Fernandes,S-N,Cidade Univ, BR-50740560 Recife, PE, Brazil

[2] Univ Fed Pernambuco, Dept Engn Quim, Av Prof Arthur Sd,S-N,Cidade Univ, BR-50740521 Recife, PE, Brazil

[3] Univ Rovira & Virgili, Dept Quim Analit & Quim Organ, P1 Imperial Tarraco 1, E-43005 Tarragona, Spain

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2017年 / 170卷

基金：

巴西圣保罗研究基金会;

关键词：

Near infrared spectroscopy; Esterification; High acidity; Free fatty acid; In-line monitoring; Biodiesel; ACID;

D O I：

10.1016/j.saa.2016.07.006

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

This work presents a comprehensive near infrared study for in-line monitoring of the esterification reaction of high acid oils, such as Jatropha curcas oil, using ethanol. Parallel reactions involved in the process were carried out to select a spectral region that characterizes the evolution of the esterification reaction. Using absorbance intensities at 5176 cm(-1), the conversion and kinetic behaviors of the esterification reaction were estimated. This method was applied to evaluate the influence of temperature and catalyst concentration on the estimates of initial reaction rate and ester conversion as responses to a 2(2) factorial experimental design. Employment of an alcohol/oil ratio of 16:1, catalyst concentration of 1.5% w/w, and temperatures at 65 degrees C or 75 degrees C, made it possible to reduce the initial acidity from 18% to 1.3% w/w, which is suitable for transesterification of high free fatty acid oils for biodiesel production. Using the proposed analytical method in the esterification reaction of raw materials with high free fatty acid content for biodiesel makes the monitoring process inexpensive, fast, simple, and practical. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：56 / 64

页数：9

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