Acid-catalyzed etherification of bio-glycerol and isobutylene over sulfonic mesostructured silicas

被引：175

作者：

Melero, J. A. ^{[1
]}

Vicente, G. ^{[1
]}

Morales, G. ^{[1
]}

Paniagua, M. ^{[1
]}

Moreno, J. M. ^{[2
]}

Roldan, R. ^{[2
]}

Ezquerro, A. ^{[3
]}

Perez, C. ^{[3
]}

机构：

[1] Univ Rey Juan Carlos, ESCET, Dept Chem & Environm Technol, Madrid 28933, Spain

[2] Repsol YPF Res Ctr, Madrid 28931, Spain

[3] Acciona Biocombustibles SA, Sarriguren 31621, Spain

来源：

APPLIED CATALYSIS A-GENERAL | 2008年 / 346卷 / 1-2期

关键词：

sulfonic; isobutylene; glycerol; tertiary butyl ethers; mesoporous; fuel additives;

D O I：

10.1016/j.apcata.2008.04.041

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：

Sulfonic-acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated derivates. Di-tert-butylglycerols (DTBG) and tri-tert-butylglycerol (TTBG) have shown to be valuable fuel additives leading to decreases in the emission of particulate matter, hydrocarbons, carbon monoxide and unregulated aldehydes. Likewise, said ethers can also act as cold flow improvers for use in biodiesel, reducing also its viscosity. The activities and selectivities achieved over sulfonic acid-functionalized mesostructured silicas are comparable or even superior to those displayed by widely used macroporous commercial acid resins. Under optimized reaction conditions, these mesostructured catalysts yield a complete glycerol conversion with a combined selectivity towards DTBG and TTBG up to ca. 90%. Furthermore, no formation of undesirable isobutylene oligomers is observed. The acid strength of the sulfonic acid sites has also been found to be an important factor affecting the catalytic performance of these materials. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：44 / 51

页数：8

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