Transesterification reaction of vegetable oils, using superacid sulfated TiO2-base catalysts

被引：127

作者：

de Almeida, Rusiene M. ^{[1
]}

Noda, Lucia K. ^{[2
]}

Goncalves, Norberto S. ^{[2
]}

Meneghetti, Simoni M. P. ^{[1
]}

Meneghetti, Mario R. ^{[1
]}

机构：

[1] Univ Fed Alagoas, Inst Quim & Biotechnol, BR-57072970 Maceio, AL, Brazil

[2] Univ Fed Sao Paulo, Dept Fis & Ciencia Matemat, BR-09972270 Diadema, SP, Brazil

来源：

APPLIED CATALYSIS A-GENERAL | 2008年 / 347卷 / 01期

关键词：

superacids; biodiesel; transesterification; TiO2/SO4;

D O I：

10.1016/j.apcata.2008.06.006

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：

Superacid sulfated titania catalyst, TiO2/SO4 (TS-series), have been prepared via the sol-gel technique, with different sulfate concentrations. The relation of structure and catalytic activity of the prepared material have been evaluated. The obtained material was characterized by several techniques, as infrared and Raman absorption spectroscopy. pyridine-adsorption infrared spectroscopy, thermogravimetric analyses and obtention of N-2 adsorption-desorption isotherms. The catalyst that exhibits the highest catalytic activity in the methanolysis of soybean and castor oils at 120 degrees C, for 60 min (40% and 25%, respectively) was that which displayed the highest specific surface area, average pores diameter and pore volume, and highest percentage in sulfate groups (TS-5). (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：100 / 105

页数：6

共 37 条

[1] Preparation of superacids by metal oxides for reactions of butanes and pentanes [J].

Arata, K .

APPLIED CATALYSIS A-GENERAL, 1996, 146 (01) :3-32

[2]

ARATA K, 1988, P 9 INT C CAT CALG 1, P1727

[3]

Arata K., 1990, ADV CATAL, V37, P165

[4] Influences of some synthesis parameters and activation procedures on the one-step sol-gel synthesis of sulfated-zirconia catalysts, followed by TG-DSC and mass spectrometry [J].

Armendariz, H ;

Coq, B ;

Tichit, D ;

Dutartre, R ;

Figueras, F .

JOURNAL OF CATALYSIS, 1998, 173 (02) :345-354

[5]

BARRET EP, 1951, J AM CHEM SOC, V73, P380

[6] HYDROLYSIS AND CONDENSATION OF SILICATES - EFFECTS ON STRUCTURE [J].

BRINKER, CJ .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1988, 100 (1-3) :31-50

[7] Adsorption of gases in multimolecular layers [J].

Brunauer, S ;

Emmett, PH ;

Teller, E .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1938, 60 :309-319

[8] THE SOL-GEL PREPARATION OF SILICA-GELS [J].

BUCKLEY, AM ;

GREENBLATT, M .

JOURNAL OF CHEMICAL EDUCATION, 1994, 71 (07) :599-602

[9] FT RAMAN AND FTIR STUDIES OF TITANIAS AND METATITANATE POWDERS [J].

BUSCA, G ;

RAMIS, G ;

AMORES, JMG ;

ESCRIBANO, VS ;

PIAGGIO, P .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1994, 90 (20) :3181-3190

[10] STUDY OF INTERACTION OF ALIPHATIC-ALCOHOLS WITH TIO2 .3. FORMATION OF ALKYL-TITANIUM SPECIES DURING METHANOL DECOMPOSITION [J].

CARRIZOSA, I ;

MUNUERA, G ;

CASTANAR, S .

JOURNAL OF CATALYSIS, 1977, 49 (03) :265-277

← 1 2 3 4 →