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Sulfonated niobia and pillared clay as catalysts in etherification reaction of glycerol

Paper ID Volume ID Publish Year Pages File Format Full-Text
39678 45831 2014 9 PDF Available
Title
Sulfonated niobia and pillared clay as catalysts in etherification reaction of glycerol
Abstract

•Niobia and pillared clay can be easily sulfonated by sulfuric acid treatment.•Niobia presented sulfur concentration as high as 5.4 ± 0.4 μmol m−2 (2.6%).•Sulfonated pillared clay allowed a glycerol conversion of 95%.•It was not identified contribution of homogeneous catalysis.

Sulfonated niobia (HY-340 CBMM) and pillared clay (Fluka) were tested in the catalytic conversion of glycerol by etherification reactions. The solids were treated with concentrated fuming sulfuric acid (AS100 and NS100), and a 30% aqueous solution of this acid (AS30 and NS30). Both the presence of sulfur and the increase in the acidity of the solids demonstrate the suitability of the sulfonation process, especially in samples treated with concentrated fuming sulfuric acid. The best catalyst for the reaction of etherification with tert-butyl alcohol was AS100, with a glycerol conversion of 95% after 5 h at 393 K and yield of 60.3, 33.2 and 5.4%, respectively for mono-tert-butyl-glycerol (MTBG), di-tert-butyl-glycerol (DTBG) and tri-tert-butyl-glycerol (TTBG).

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Keywords
Glycerol; Etherification; Sulfonation; Niobia; Pillared clay
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Sulfonated niobia and pillared clay as catalysts in etherification reaction of glycerol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 478, 20 May 2014, Pages 98–106
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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