Repositorio
Institucional

Cea, Mara

Rocha, Sebastian

Marzialetti, Teresita

Kopp, Matias

Reaction Mechanism of the Microwave-Assisted Synthesis of 5-Hydroxymethylfurfural from Sucrose in Sugar Beet Molasses

MDPI

CATALYSTS

en

5-hydroxymethylfurfural (HMF) stands out among the chemical products derived from biomass as a building block in the chemical industry. The conventional production of HMF is usually carried out from fructose, glucose, or other monosaccharides as feedstock, but sugar beet molasses, a by-product of the sugar industry containing sucrose (45-55%), is promising. This exploratory study used three aqueous stock solutions and one biphasic system as the sources of sucrose. The dehydration of sucrose to 5-hydroxymethylfurfural was assisted by microwave heating and subcritical water conditions. The maximum yield of HMF was 27.8 mol % for the aqueous solution of synthetic sucrose at 80 min of treatment. Although HMF yield was 7.1 mol % in the aqueous sugar beet molasses solution, it increased 2-fold after clarification (15.1 mol %) and 1.6-fold in the biphasic system (11.4 mol %). These are favorable outcomes since this is an exploratory investigation. The pseudo-first-order model fitted experimental data from the conversion of the sucrose from the stock solutions, and kinetic parameters were estimated and compared. The estimated reaction rate constant showed that inversion of sucrose is faster than fructose dehydration to HMF, but the latter reaction was the rate-determining step only for the biphasic system. The maximum partition coefficient value was four between 40 min and 60 min of reaction, calculated at room temperature. These predictions help investigators to estimate conversions and selectivity when pilot plants need to be simulated.

artículo original

"This work was supported by Agencia Nacional de Investigacion y Desarrollo (ANID) scholarship 21181314 and the FONDECYT Regular Project 1201865, ""Designing a continuous process for remediation of water contaminated with chlorinated compounds using iron oxide-hydrochar composite"".

Este trabajo contó con el apoyo de la beca 21181314 de la Agencia Nacional de Investigación y Desarrollo (ANID) y el Proyecto Regular FONDECYT 1201865, ""Diseño de un proceso continuo para la remediación de aguas contaminadas con compuestos clorados utilizando compuestos de óxido de hierro-hidrocarbón""."

10.3390/catal11121458

PDF

5-hydroxymethylfurfural

microwave-assisted synthesis

biobased building block

biphasic synthesis

DEHYDRATION

CONVERSION

CATALYSTS

FRUCTOSE

SYSTEM

WATER

Química

Física

5-hidroximetilfurfural

síntesis asistida por microondas

bloque de construcción de base biológica

síntesis bifásica

DESHIDRATACIÓN

CONVERSIÓN

CATALIZADORES

FRUCTOSA

SISTEMA

AGUA

Ingeniería Química

Ingeniería en Procesos Químicos

Biotecnología Industrial

version publicada

dorada

verde

acceso abierto

acceso abierto

WOS:000736235700001

Reaction Mechanism of the Microwave-Assisted Synthesis of 5-Hydroxymethylfurfural from Sucrose in Sugar Beet Molasses

artículo original

CC BY 4.0

CC BY 4.0

ANID 21181314

ANID FONDECYT 1201865