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Catalytic cyclodehydration of xylose to furfural in the presence of zeolite H-Beta and a micro/mesoporous Beta/TUD-1 composite material

Paper ID Volume ID Publish Year Pages File Format Full-Text
41827 45901 2010 8 PDF Available
Title
Catalytic cyclodehydration of xylose to furfural in the presence of zeolite H-Beta and a micro/mesoporous Beta/TUD-1 composite material
Abstract

The batch-wise and aqueous phase cyclodehydration of d-xylose to furfural (FUR) at 170 °C has been investigated in the presence of a composite material consisting of zeolite Beta nanocrystals (Si/Al = 12) embedded in a purely siliceous TUD-1 mesoporous matrix (BEATUD), characterised by elemental analysis, powder XRD, TEM and N2 sorption. After 8 h the xylose conversion reached 98% and the FUR yield was 74%. The initial reaction rates for BEATUD and the bulk nanocrystalline zeolite Beta (BEA) were similar when expressed on the basis of the total amount of acid sites (Lewis + Brønsted) determined through FTIR analysis of adsorbed pyridine. However, the FUR yields at high xylose conversions of ca. 98% were higher for BEATUD (74%) than for bulk BEA (54%). TGA and DSC analyses for recovered catalysts showed that BEATUD possessed a lower amount of carbonaceous matter after a catalytic run, suggesting that the improved performance of the composite may be due to favourable competitive adsorption effects caused by the surrounding silica matrix. By thermally removing the carbonaceous matter between consecutive batch runs, BEATUD could be repeatedly reused without loss of catalytic performance.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (124 K)Download as PowerPoint slideResearch highlights▶ Improved performance of the composite BEATUD in comparison to zeolite BEA. ▶ Amount of undesired carbonaceous matter is less for BEATUD than for BEA. ▶ Organic matter may possess aldehyde/ketone groups, xylose-related and hydrocarbon fragments. ▶ Successful catalyst regeneration after thermal decomposition of carbonaceous matter.

Keywords
Xylose; Furfural; Acid dehydration; Beta zeolite; TUD-1
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Catalytic cyclodehydration of xylose to furfural in the presence of zeolite H-Beta and a micro/mesoporous Beta/TUD-1 composite material
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 388, Issues 1–2, 20 November 2010, Pages 141–148
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us