Production of biodiesel by esterification of palmitic acid over mesoporous aluminosilicate Al-MCM-41

被引：175
|
作者：
Carmo, Alipio C., Jr. [1 ]
de Souza, Luiz K. C. [1 ]
da Costa, Carlos E. F. [1 ]
Longo, E. [2 ]
Zamian, Jose R. [1 ]
da Rocha Filho, Geraldo N. [1 ]
机构：
[1] Fed Univ Para, Inst Ciencias Exatas & Nat, Fac Quim, Lab Catalise & Oleoquim, BR-66075110 Belem, Para, Brazil
[2] Univ Estadual Paulista Julio Mesquita Filho UNESP, Inst Quim Araraquara, Dept Bioquim & Tecnol Quim, BR-14801907 Araraquara, SP, Brazil
来源：
FUEL | 2009年 / 88卷 / 03期
关键词：
Mesoporous; Molecular sieves; Acid catalysts biodiesel; Esterification; FREE FATTY-ACIDS; MOLECULAR-SIEVES; ACETIC-ACID; CATALYTIC APPLICATION; METHANOL; MCM-41; OIL; TEMPERATURE; ALCOHOLS; ZIRCONIA;
D O I：
10.1016/j.fuel.2008.10.007
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Biodiesel has been obtained by esterification of palmitic acid with methanol, ethanol and isopropanol in the presence of Al-MCM-41 mesoporous molecular sieves with Si/Al ratios of 8.16 and 32. The catalytic acids were synthesized at room temperature and characterized by atomic absorption spectrometry (AAS), thermal analysis (TG/DTA), X-ray diffraction (XRD), nitrogen absorption (BET/BJH), infrared spectroscopy (IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The reaction was carried out at 130 degrees C whilst stirring at 500 rpm, with an alcohol/acid molar ratio of 60 and 0.6 wt% catalyst for 2 h. The alcohol reactivity follows the order methanol > ethanol > isopropanol. The catalyst Al-MCM-41 with ratio Si/Al = 8 produced the largest conversion values for the alcohols studied. The data followed a rather satisfactory approximation to first-order kinetics. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：461 / 468
页数：8
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