NDLI: Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides

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Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides

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Catalysis Science & Technology Vol - 5 Issue - 7

Catalysis Science & Technology Vol - 5 Issue - 6

Catalysis Science & Technology Vol - 5 Issue - 5

Catalysis Science & Technology Vol - 5 Issue - 4

Catalysis Science & Technology Vol - 5 Issue - 3

Catalysis Science & Technology Vol - 5 Issue - 2

Catalysis Science & Technology Vol -4

Catalysis Science & Technology Vol -3

Catalysis Science & Technology Vol -2

Catalysis Science & Technology Vol -1

Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides

Content Provider	Royal Society of Chemistry (RSC)
Author	Castilho, Paula Moniz, Patricia Vilcocq, Léa Carvalheiro, Florbela Fernandes, César Spinola, Vitor Duarte, Luís C.
Copyright Year	2015
Abstract	The hydrolysis of hemicellulosic oligosaccharides (OS) was investigated using acid-activated clays (prepared from natural Porto Santo montmorillonite clay) as catalysts. Acid activation was performed in HCl solution or with aluminium exchange. The clay catalysts were characterized by XRD, N2 adsorption isotherms, CEC, FTIR, titration of acid sites in water and adsorption of sugars and disaccharides. They were tested for the hydrolysis of a model compound, maltose, and of OS-rich liquor from rice straw fractionation. The HCl-activated clays were the most efficient catalysts for maltose hydrolysis. It was demonstrated that the hydrolysis of OS into monomer sugars over a clay catalyst is technically feasible and that this reaction leads to the selective removal of glucose, arabinose and acetic acid side groups from the OS structure, thus yielding simpler xylo-oligosaccharide chains. Furthermore, no significant conversion of monomer sugars into furans was observed.
Starting Page	4072
Ending Page	4080
Page Count	9
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	5
Issue Number	8
Journal	Catalysis Science & Technology
DOI	10.1039/c5cy00195a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	CEC Acid Montmorillonite Aluminium Maltose Glucose Hydrolysis Hydrochloric acid X-ray crystallography Porto Santo Island Arabinose Adsorption Clay minerals Titration Monomer Operating system Rice
Content Type	Text
Resource Type	Article
Subject	Catalysis

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Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides

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