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Polar aprotic solvent-water mixture as the medium for catalytic production of hydroxymethylfurfural (HMF) from bread waste

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Author(s)

  • Iris K M Yu
  • Daniel C W Tsang
  • Season S Chen
  • Lei Wang
  • Andrew J Hunt
  • James Sherwood
  • Karine De Oliveira Vigier
  • François Jérôme
  • Yong Sik Ok
  • Chi Sun Poon

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Publication details

JournalBIORESOURCE TECHNOLOGY
DateAccepted/In press - 29 Aug 2017
DateE-pub ahead of print (current) - 1 Sep 2017
Issue numberPt A
Volume245
Number of pages7
Pages (from-to)456-462
Early online date1/09/17
Original languageEnglish

Abstract

Valorisation of bread waste for hydroxymethylfurfural (HMF) synthesis was examined in dimethyl sulfoxide (DMSO)-, tetrahydrofuran (THF)-, acetonitrile (ACN)-, and acetone-water (1:1v/v), under heating at 140°C with SnCl4 as the catalyst. The overall rate of the process was the fastest in ACN/H2O and acetone/H2O, followed by DMSO/H2O and THF/H2O due to the rate-limiting glucose isomerisation. However, the formation of levulinic acid (via rehydration) and humins (via polymerisation) was more significant in ACN/H2O and acetone/H2O. The constant HMF maxima (26-27mol%) in ACN/H2O, acetone/H2O, and DMSO/H2O indicated that the rates of desirable reactions (starch hydrolysis, glucose isomerisation, and fructose dehydration) relative to undesirable pathways (HMF rehydration and polymerisation) were comparable among these mediums. They also demonstrated higher selectivity towards HMF production over the side reactions than THF/H2O. This study differentiated the effects of polar aprotic solvent-water mediums on simultaneous pathways during biomass conversion.

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© 2017 Elsevier Ltd. All rights reserved. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy.

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