| Solid Acid-Catalyzed Cellulose Hydrolysis Monitored by In Situ ATR-IR Spectroscopy. | |
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MedLine Citation:
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PMID: 22315193 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The solid acid-catalyzed hydrolysis of cellulose was studied under elevated temperatures and autogenous pressures using in situ ATR-IR spectroscopy. Standards of cellulose and pure reaction products, which include glucose, fructose, hydroxymethylfurfural (HMF), levulinic acid (LA), formic acid, and other compounds, were measured in water under ambient and elevated temperatures. A combination of spectroscopic and HPLC analysis revealed that the cellulose hydrolysis proceeds first through the disruption of the glycosidic linkages of cellulose to form smaller cellulose molecules, which are readily observed by their distinctive CO vibrational stretches. The continued disruption of the linkages in these oligomers eventually results in the formation and accumulation of monomeric glucose. The solid-acid catalyst accelerated the isomerization of glucose to fructose, which then rapidly reacted under hydrothermal conditions to form degradation products, which included HMF, LA, formic acid, and acetic acid. The formation of these species could be suppressed by decreasing the residence time of glucose in the reactor, reaction temperature, and contact with the metal reactor. The hydrolysis of regenerated cellulose proceeded faster and under milder conditions than microcrystalline cellulose, which resulted in increased glucose yield and selectivity. |
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Authors:
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Joseph Zakzeski; Ruud J H Grisel; Arjan T Smit; Bert M Weckhuysen |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-7 |
Journal Detail:
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Title: ChemSusChem Volume: - ISSN: 1864-564X ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-8 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101319536 Medline TA: ChemSusChem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
Affiliation:
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Inorganic Chemistry and Catalysis Group, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, (The Netherlands), Fax: (+31) 302-534328. |
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