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Title: Reaction behavior of glucose and fructose in subcritical water in the presence of various salts
Authors: Furushiro, Yuya
Kobayashi, Takashi  kyouindb  KAKEN_id
Author's alias: 小林, 敬
Keywords: decomposition
isomerization
salt
selectivity
subcritical water
Issue Date: 20-Feb-2020
Publisher: The Japanese Society of Applied Glycoscience
Journal title: Journal of Applied Glycoscience
Volume: 67
Issue: 1
Start page: 11
End page: 15
Abstract: Glucose and fructose were treated in subcritical water in the presence of alkali or alkaline earth metal chlorides. All salts accelerated the conversion of saccharides, and alkaline earth metal chloride greatly promoted the isomerization of glucose to fructose. In contrast, alkali metal salts only slightly promoted this isomerization and facilitated the decomposition of glucose to byproducts such as organic acids. The selectivity of the glucose-to-fructose isomerization was higher at lower conversions of glucose and in the presence of alkaline earth metal chlorides. The pH of the reaction mixture also greatly affected the selectivity, which decreased rapidly at lower pH due to the generated organic acids. At low pH, decomposition of glucose became dominant over isomerization, but further conversion of glucose was suppressed. This result was elucidated by the suppression of the alkali-induced isomerization of glucose at low pH. Fructose underwent decomposition during the treatment of the fructose solution, but its isomerization to glucose was not observed. The added salts autocatalytically promoted the decomposition of fructose, and the reaction mechanism of fructose decomposition differed from that of glucose.
Rights: © 2020 by The Japanese Society of Applied Glycoscience This is an open-access paper distributed under the terms of the Creative Commons Attribution Non-Commercial (by-nc) License (CC-BY-NC4.0: https://creativecommons.org/licenses/by-nc/4.0/).
URI: http://hdl.handle.net/2433/246200
DOI(Published Version): 10.5458/jag.jag.JAG-2019_0014
PubMed ID: 34429694
Appears in Collections:Journal Articles

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