Esterification of free fatty acids to biodiesel over heteropolyacids immobilized on mesoporous silica

被引：82
作者：
Tropecelo, A. I. [1 ]
Casimiro, M. H. [2 ]
Fonseca, I. M. [2 ]
Ramos, A. M. [2 ]
Vital, J. [2 ]
Castanheiro, J. E. [1 ]
机构：
[1] Univ Evora, Dept Quim, Ctr Quim Evora, P-7000671 Evora, Portugal
[2] Univ Nova Lisboa, REQUIMTE, CQFB, Fac Ciencias & Tecnol, P-2829516 Caparica, Portugal
来源：
APPLIED CATALYSIS A-GENERAL | 2010年 / 390卷 / 1-2期
关键词：
Biodiesel; Heteropolyacids; Esterification; Free fatty acids; SBA-15; 12-TUNGSTOPHOSPHORIC ACID; ACTIVATED CARBON; SOLID ACID; CATALYZED ESTERIFICATION; PHASE ESTERIFICATION; MEMBRANE REACTORS; VEGETABLE-OIL; ALPHA-PINENE; ACETIC-ACID; TRANSESTERIFICATION;
D O I：
10.1016/j.apcata.2010.10.007
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Tungstophosphoric acid (PW) molybdophosphoric acid (PMo) and tungstosilicic acid (SiW) immobilized on SBA-15 were used as catalysts in the esterification of palmitic acid with methanol at 60 C Catalysts were characterized by N-2 adsorption FUR X-ray diffraction ICP-AES and TEM All catalysts exhibited high catalytic activity in palmitic acid esterification with methanol It was observed that the catalytic activity decreases in the follow series PW1-SBA-15 > SiW-SBA-15 > PMo-SBA-15 A series of PW immobilized on SBA-15 with different PW loadings from 27 wt% to 8 3 wt% were prepared It was observed high catalytic activity with low amount of tungstophosphoric acid immobilized on SBA-15 In order to optimize the reaction conditions the effect of different parameters such as catalyst loading carbon length of the alcohol and temperature molar ratio of fatty acid to methanol in the presence of PW3-SBA-15 were studied PW3-SBA-15 catalyst can be separated from reaction system for re-use It was observed a small leaching of the PW from SBA-15 to liquid phase PW3-SBA-15 catalyst was also used in the esterification of stearic and oleic acid with methanol High catalytic activity was observed (C) 2010 Elsevier BV All rights reserved
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页码：183 / 189
页数：7
相关论文
共 60 条
[1]   Heteropoly acids as catalysts for liquid-phase esterification and transesterification [J].
Alsalme, Ali ;
Kozhevnikova, Elena F. ;
Kozhevnikov, Ivan V. .
APPLIED CATALYSIS A-GENERAL, 2008, 349 (1-2) :170-176
[2]   Acid-catalyzed homogeneous esterification reaction for biodiesel production from palm fatty acids [J].
Aranda, Donato A. G. ;
Santos, Rafael T. P. ;
Tapanes, Neyda C. O. ;
Ramos, Andre Luis Dantas ;
Antunes, Octavio Auqusto C. .
CATALYSIS LETTERS, 2008, 122 (1-2) :20-25
[3]   Dehydration of glycerol in gas phase using heteropolyacid catalysts as active compounds [J].
Atia, Hanan ;
Armbruster, Udo ;
Martin, Andreas .
JOURNAL OF CATALYSIS, 2008, 258 (01) :71-82
[4]   Esterification of free fatty acids with methanol using heteropolyacids immobilized on silica [J].
Caetano, C. S. ;
Fonseca, I. M. ;
Ramos, A. M. ;
Vital, J. ;
Castanheiro, J. E. .
CATALYSIS COMMUNICATIONS, 2008, 9 (10) :1996-1999
[5]   Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups [J].
Caetano, C. S. ;
Guerreiro, L. ;
Fonseca, I. M. ;
Ramos, A. M. ;
Vital, J. ;
Castanheiro, J. E. .
APPLIED CATALYSIS A-GENERAL, 2009, 359 (1-2) :41-46
[6]   Biodiesel production from high acid value waste frying oil catalyzed by superacid heteropolyacid [J].
Cao, Fenghua ;
Chen, Yang ;
Zhai, Fengying ;
Li, Jing ;
Wang, Jianghua ;
Wang, Xiaohong ;
Wang, Shengtian ;
Zhu, Weimin .
BIOTECHNOLOGY AND BIOENGINEERING, 2008, 101 (01) :93-100
[7]   Hydration of α-pinene over molybdophosphoric acid immobilized in hydrophobically modified PVA membranes [J].
Castanheiro, JE ;
Fonseca, IM ;
Ramos, AM ;
Oliveira, R ;
Vital, J .
CATALYSIS TODAY, 2005, 104 (2-4) :296-304
[8]   The acid-catalysed reaction of α-pinene over molybdophosphoric acid immobilised in dense polymeric membranes [J].
Castanheiro, JE ;
Ramos, AM ;
Fonseca, I ;
Vital, J .
CATALYSIS TODAY, 2003, 82 (1-4) :187-193
[9]   Transesterification of vegetable oil to biodiesel using a heteropolyacid solid catalyst [J].
Chai, Fang ;
Cao, Fenghua ;
Zhai, Fengying ;
Chen, Yang ;
Wang, Xiaohong ;
Su, Zhongmin .
ADVANCED SYNTHESIS & CATALYSIS, 2007, 349 (07) :1057-1065
[10]   Sustainable production of acrolein:: gas-phase dehydration of glycerol over 12-tungstophosphoric acid supported on ZrO2 and SiO2 [J].
Chai, Song-Hai ;
Wang, Hao-Peng ;
Liang, Yu ;
Xu, Bo-Qing .
GREEN CHEMISTRY, 2008, 10 (10) :1087-1093
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