fulltext.study @t Gmail

Production of 5-hydroxy-4-keto-2-pentenoic acid by photo-oxidation of 5-hydroxymethylfurfural with singlet oxygen: A kinetic investigation

Paper ID Volume ID Publish Year Pages File Format Full-Text
27107 44001 2010 8 PDF Available
Title
Production of 5-hydroxy-4-keto-2-pentenoic acid by photo-oxidation of 5-hydroxymethylfurfural with singlet oxygen: A kinetic investigation
Abstract

5-Hydroxy-4-keto-2-pentenoic acid (HKPA) is characterized by the presence in its chemical structure of four different chemical groups (hydroxyl, keto, carboxylic and unsaturated groups) that render it a possible intermediate or monomer in the chemical industry. The production of this compound is studied by the sensitized photo-oxidation of 5-hydroxymethylfurfural (5-HMF) in aqueous solution at acidic pH. 5-HMF can be easily obtained through the degradation of saccharides such as fructose or inulin.The system reactivity is influenced by the concentration of methylene blue (BM) which is used as the photosensitizer and the oxygen dissolved in the solution. Only moderate consumptions of the sensitizer are recorded during the oxidation experiments thus suggesting the possibility to recover and reuse it in new runs. No differences in the reactivity of the system and/or selectivity for HKPA are observed as a result of changes in the starting concentration of the substrate and/or pH.A simplified reaction scheme of photo-oxidation of 5-HMF is proposed. Two kinetic models are developed according to this scheme to simulate the photo-oxidation processes of the substrate in the absence and in the presence of methylene blue. A validation of these models is carried out by means of the experimental data, collected at pH = 6.0, at different initial concentrations of 5-HMF and BM.

Keywords
5-Hydroxymethylfurfural; Methylene blue; Singlet oxygen; Photo-oxidation; Photosensitizer
First Page Preview
Production of 5-hydroxy-4-keto-2-pentenoic acid by photo-oxidation of 5-hydroxymethylfurfural with singlet oxygen: A kinetic investigation
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 210, Issue 1, 5 February 2010, Pages 69–76
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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