Optimization of continuous esterification of oleic acid with ethanol over niobic acid

被引：41

作者：

Rade, Leticia L. ^{[1
]}

Lemos, Caroline O. T. ^{[1
]}

Barrozo, Marcos Antonio S. ^{[1
]}

Ribas, Rogerio M. ^{[2
]}

Monteiro, Robson S. ^{[2
,3
]}

Hori, Carla E. ^{[1
]}

机构：

[1] Univ Fed Uberlandia, Fac Engn Quim, BR-38408144 Uberlandia, MG, Brazil

[2] CBMM, BR-38183903 Araxa, Brazil

[3] Catalysis Consultoria Ltda, BR-22793081 Rio De Janeiro, Brazil

来源：

RENEWABLE ENERGY | 2018年 / 115卷

关键词：

Continuous esterification; Oleic acid; Niobium; Niobic acid; Design of experiments; Canonical analysis; BIODIESEL PRODUCTION; FATTY-ACIDS; SOLID CATALYST; OXIDE; OIL;

D O I：

10.1016/j.renene.2017.08.035

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The aim of this work was to evaluate the continuous production of biodiesel through the esterification reaction between oleic acid and ethanol using niobic acid as a solid acid catalyst. In this study, different calcination temperatures of niobic acid were tested. W/F tests were carried out, to avoid mass transfer problems and, then, the catalytic activities of all the samples were evaluated. Results showed that niobic acid calcined at 350 degrees C presented the highest catalytic activity. The experimental conditions of temperature, amount of catalyst and ethanol:oleic acid molar ratio were optimized by using design of experiments (DOE) and canonical analysis. All three single parameters were significant on the yield of esters. The esterification reaction of oleic acid led to yields of esters up to 70% and conversion up to 90%, at 249 degrees C, ethanol:oleic acid molar ratio of 10.83:1 and 0.7 g of niobic acid. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：208 / 216

页数：9

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