Catalysis of vegetable oil transesterification by Sn(II)-exchanged Keggin heteropolyacids: bifunctional solid acid catalysts

被引：38

作者：

Da Silva, Marcio Jose ^{[1
]}

Vilanculo, Castelo Bandane ^{[1
]}

Teixeira, Milena Galdino ^{[1
]}

Julio, Armanda Aparecida ^{[1
]}

机构：

[1] Univ Fed Vicosa, Chem Dept, Ave Peter Henry Rolfs S-N, BR-36590000 Vicosa, MG, Brazil

来源：

REACTION KINETICS MECHANISMS AND CATALYSIS | 2017年 / 122卷 / 02期

关键词：

Biodiesel; Tin(II) heteropolyacid salt catalysts; Solid acids; Transesterification; BIODIESEL PRODUCTION; ESTERIFICATION REACTIONS; HETEROGENEOUS CATALYSIS; EFFICIENT CATALYST; FATTY-ACIDS; CONVERSION; SALT;

D O I：

10.1007/s11144-017-1258-z

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：

Keggin heteropolyacid protons (i.e., H3PW12O40, H3PMo12O40, H4SiW12O40) were partially exchanged with Sn(II) cations generating solid acid catalysts that were used for vegetable oil transesterification reactions. These catalysts have double acidity properties, i.e., Lewis acidity and Bronsted acidity that are suitable for the conversion of vegetable oil into biodiesel. The highest efficiency (ca. 100%) was achieved on the Sn1.2H0.6PW12O40-catalyzed transesterification reactions. The relationship between the catalytic activity and acidic properties was deeply discussed and the effects of main reaction parameters were assessed. The activity of the precursor HPA, tin salts and physical mixture were compared and confirmed a synergism between Sn(II) cations and PW12O40 (3-) anions. The reusability of catalyst was investigated.

引用

页码：1011 / 1030

页数：20

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