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Promotion effect of mesopore on the conversion of carbohydrates to methyl levulinate over H-USY zeolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
49302 46733 2015 5 PDF Available
Title
Promotion effect of mesopore on the conversion of carbohydrates to methyl levulinate over H-USY zeolite
Abstract

•Mesopores were formed on USY zeolite by treatment with nitric acid.•Acid in low concentration mainly removes extraframework Al.•Acid sites are primary for the conversion of glucose to MLE.•Mesopores promote the efficiency of acid sites.

H-USY was treated with nitric acid solution to remove Al species and thus adjust the mesoporosity and acidity. Effects of mesopore and acidity of H-USY zeolite were studied on the conversion of carbohydrate to methyl levulinate (MLE). Low concentration of nitric acid mainly removed the extraframework aluminum species with the increase of mesoporosity and resulted in a slight decrease of acidity. Both extraframework and framework Al species were removed to some extent under high concentration of nitric acid, associating with the obvious decrease of acidity. H-USY treated with low concentration of nitric acid showed higher yield of MLE than H-USY-parent. Generated mesopores improved the diffusion limitations, facilitated the accessibility of reactant to the acid sites, and thus promoted the formation of MLE.

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Keywords
Glucose; Methyl levulinate; Mesopore; H-USY
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Promotion effect of mesopore on the conversion of carbohydrates to methyl levulinate over H-USY zeolite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 71, 5 November 2015, Pages 74–78
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
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Any Questions? feel free to contact us