| Catalytic dehydration of fructose to 5-hydroxymethylfurfural over Nb(2)O(5) catalyst in organic solvent. | |
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MedLine Citation:
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PMID: 23348242 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The catalytic dehydration of fructose to 5-hydroxymethylfurfural (HMF) in DMSO was performed over Nb(2)O(5) derived from calcination of niobic acid at various temperatures (300-700°C). The catalysts were characterized by powder X-ray diffraction, N(2) physical adsorption, temperature-programed desorption of NH(3), n-butylamine titration using Hammett indicators, infrared spectroscopy of adsorbed pyridine, and X-ray photoelectron spectroscopy. It was found that both catalytic activity and surface acid sites decrease with increasing calcination temperatures. The Nb(2)O(5) derived from calcination of niobic acid at 400°C reveals the maximum yield of HMF among all the catalysts, although the amount of acid sites on the catalyst is lower than that on the sample calcined at 300°C. The results suggest that the presence of larger amounts of strong acid sites on the surface of the Nb(2)O(5) calcined at 300°C may promote side reactions. The Nb(2)O(5) prepared at 400°C shows 100% fructose conversion with 86.2% HMF yield in DMSO at 120°C after 2h. The activity of the catalyst decreases gradually during recycle because of coke deposition; however, it can be fully recovered by calcination at 400°C for 2h, suggesting that this catalyst is of significance for practical applications. |
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Authors:
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Fenfen Wang; Hai-Zhen Wu; Chun-Ling Liu; Rong-Zhen Yang; Wen-Sheng Dong |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-3 |
Journal Detail:
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Title: Carbohydrate research Volume: 368C ISSN: 1873-426X ISO Abbreviation: Carbohydr. Res. Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0043535 Medline TA: Carbohydr Res Country: - |
Other Details:
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Languages: ENG Pagination: 78-83 Citation Subset: - |
Copyright Information:
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Copyright © 2012 Elsevier Ltd. All rights reserved. |
Affiliation:
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Key Laboratory of Applied Surface and Colloid Chemistry (SNNU), MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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