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

被引：177

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

页码：461 / 468

页数：8

共 36 条

[1] Esterification of alkyl acids with alkanols over MCM-41 molecular sieves: Influence of hydrophobic surface on condensation reaction [J].