Cellulose conversion to ethylene glycol by tungsten oxide-based catalysts

Jan Wiesfeld, Peter Peršolja, Florianne A. Rollier, Adelheid Elemans - Mehring, Emiel Hensen (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

1 Citaat (Scopus)

Uittreksel

The conversion of cellulose into ethylene glycol remains a significant challenge in the biobased domain. Here we explored the activity of various bulk and mesoporous (doped) tungsten oxides in combination with carbon-supported ruthenium for obtaining ethylene glycol from cellulose. Tungstite and sub-stoichiometric tungsten oxides are more active and selective than monoclinic WO 3 . Doping tungstite with early transition metals enhanced the rate of cellulose depolymerization to glucose through a higher Brønsted acidity, although this did not improve the overall performance as the higher acidity resulted in a higher rate of humin formation. The increased acidity of mesoporous sub-stoichiometric tungsten oxide compared to tungstite had a similar adverse effect. Doping this material with niobium improved ethylene glycol selectivity at similar conversion. Kinetic studies showed that the majority of ethylene glycol is produced in the first hour for three optimized catalysts, with undoped bulk tungstite being the most efficient catalytic material. Impregnation of these materials with ruthenium instead of using carbon-supported ruthenium as a co-catalyst was most beneficial for tungstite, as it showed improved ethylene glycol selectivity and lower polyol yields after 1 h of reaction time.

TaalEngels
Artikelnummer110400
TijdschriftMolecular Catalysis
Volume473
DOI's
StatusGepubliceerd - 1 aug 2019

Vingerafdruk

tungsten oxides
Ethylene Glycol
Ethylene glycol
cellulose
Cellulose
Tungsten
glycols
ethylene
Ruthenium
catalysts
Catalysts
Oxides
Acidity
acidity
ruthenium
Carbon
selectivity
doping (materials)
Niobium
Doping (additives)

Trefwoorden

    Citeer dit

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    title = "Cellulose conversion to ethylene glycol by tungsten oxide-based catalysts",
    abstract = "The conversion of cellulose into ethylene glycol remains a significant challenge in the biobased domain. Here we explored the activity of various bulk and mesoporous (doped) tungsten oxides in combination with carbon-supported ruthenium for obtaining ethylene glycol from cellulose. Tungstite and sub-stoichiometric tungsten oxides are more active and selective than monoclinic WO 3 . Doping tungstite with early transition metals enhanced the rate of cellulose depolymerization to glucose through a higher Br{\o}nsted acidity, although this did not improve the overall performance as the higher acidity resulted in a higher rate of humin formation. The increased acidity of mesoporous sub-stoichiometric tungsten oxide compared to tungstite had a similar adverse effect. Doping this material with niobium improved ethylene glycol selectivity at similar conversion. Kinetic studies showed that the majority of ethylene glycol is produced in the first hour for three optimized catalysts, with undoped bulk tungstite being the most efficient catalytic material. Impregnation of these materials with ruthenium instead of using carbon-supported ruthenium as a co-catalyst was most beneficial for tungstite, as it showed improved ethylene glycol selectivity and lower polyol yields after 1 h of reaction time.",
    keywords = "Biomass valorization, Cellulose, Ethylene glycol, Retro-aldol, Tungsten oxide",
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    Cellulose conversion to ethylene glycol by tungsten oxide-based catalysts. / Wiesfeld, Jan; Peršolja, Peter; Rollier, Florianne A.; Elemans - Mehring, Adelheid; Hensen, Emiel (Corresponding author).

    In: Molecular Catalysis, Vol. 473, 110400, 01.08.2019.

    Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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    AU - Peršolja,Peter

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    AU - Hensen,Emiel

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    AB - The conversion of cellulose into ethylene glycol remains a significant challenge in the biobased domain. Here we explored the activity of various bulk and mesoporous (doped) tungsten oxides in combination with carbon-supported ruthenium for obtaining ethylene glycol from cellulose. Tungstite and sub-stoichiometric tungsten oxides are more active and selective than monoclinic WO 3 . Doping tungstite with early transition metals enhanced the rate of cellulose depolymerization to glucose through a higher Brønsted acidity, although this did not improve the overall performance as the higher acidity resulted in a higher rate of humin formation. The increased acidity of mesoporous sub-stoichiometric tungsten oxide compared to tungstite had a similar adverse effect. Doping this material with niobium improved ethylene glycol selectivity at similar conversion. Kinetic studies showed that the majority of ethylene glycol is produced in the first hour for three optimized catalysts, with undoped bulk tungstite being the most efficient catalytic material. Impregnation of these materials with ruthenium instead of using carbon-supported ruthenium as a co-catalyst was most beneficial for tungstite, as it showed improved ethylene glycol selectivity and lower polyol yields after 1 h of reaction time.

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