Hydrogen from ethylene glycol by supercritical water reforming using noble and base metal catalysts

Vlieger, Dennis de; Chakinala, Anand G.; Lefferts, Leon; Kersten, Sascha R.A.; Seshan, Kulathuiyer; Brilman, Wim

doi:10.1016/j.apcatb.2011.11.005

Cited by 58 publications

(58 citation statements)

References 36 publications

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“…Pt/Al 2 O 3 also gave lower H 2 selectivity due to the formation of alkanes. We showed further that the presence of Ni in the Pt/Al 2 O 3 catalyst suppressed the above problems such as catalyst deactivation and high amounts of alkane formation and provided the basis for the development of an efficient catalyst [8].…”

Section: Introductionmentioning

confidence: 82%

“…Experimental details regarding catalyst preparation and characterization are discussed Table 1: Characterictics of the studied catalystsin a previous publication [8]. Details of the catalysts used for this study are summarized in Table 1.…”

Section: Catalyst Preparation and Characterizationmentioning

confidence: 99%

“…The experimental setup used is described in detail in an earlier publication [8]. A 2 mL min À1 flow of 1 wt% oxygenate solution (ethylene glycol (P99.9%, Sigma-Aldrich), acetic acid (P99.9%, Merck), or methanol (P99.9%, Merck), or ethanol (P99.9%, Merck)) was first preconditioned to the operating conditions (275°C and 200 bar) before it entered the reactor in which 1.0 g of catalyst was placed.…”

Section: Catalytic Testingmentioning

confidence: 99%

“…Thermodynamics favor hydrogen at these low temperatures, but the reaction rates are slow [7]. Increasing the temperature to obtain commercially viable reaction rates has the disadvantage of increased formation of undesired alkanes [8], thus reducing the hydrogen yield.…”

Section: Introductionmentioning

confidence: 99%

“…We reported recently that Pt/Al 2 O 3 catalyst showed conversion rates for APR of ethylene glycol that are very attractive for industrial application [8]. However, this catalyst was found to deactivate during the reaction.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Aqueous Phase Reforming of ethylene glycol – Role of intermediates in catalyst performance

Vlieger

Mojet

Lefferts

et al. 2012

Journal of Catalysis

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Section: Introductionmentioning

confidence: 82%

Section: Catalyst Preparation and Characterizationmentioning

confidence: 99%

Section: Catalytic Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Aqueous Phase Reforming of ethylene glycol – Role of intermediates in catalyst performance

Vlieger

Mojet

Lefferts

et al. 2012

Journal of Catalysis

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Carbon Nanotubes: A Promising Catalyst Support Material for Supercritical Water Gasification of Biomass Waste

Vlieger¹,

Thakur²,

Lefferts³

et al. 2012

ChemCatChem

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Supercritical water (SCW) as a reaction medium is especially promising for the production of renewable chemicals from biomass. Stability issues of catalyst support materials in SCW are a major setback for these reactions and hinder the further development and industrial exploitation of this technique. The development of stable catalytic support materials for reactions in SCW is, therefore, of great importance. Carbon nanotubes (CNTs) are widely recognized for their significant physical and chemical stability, high heat conductivity, and open structure. These properties have already been explored for different applications. We show that CNTs are a promising stable catalyst support material for reactions in SCW. As an illustration of the applicability of CNTs in SCW, we demonstrate the efficiency of Pt‐CNTs as catalysts for the production of hydrogen by reforming of ethylene glycol and acetic acid in SCW.

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Inhibition by Inorganic Dopants of γ‐Alumina Chemical Weathering under Hydrothermal Conditions: Identification of Reactive Sites and their Influence in Fischer–Tropsch Synthesis

et al. 2017

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Understanding how alumina degradation to boehmite AlOOH can be prevented under hydrothermal conditions is key to design more stable catalysts supported on alumina for Fischer–Tropsch synthesis. We compare the effect of four inorganic dopants to inhibit γ‐alumina chemical weathering under hydrothermal conditions: three metal ions: Mg2+, Zr4+, Ni2+, introduced by impregnation, and nonmetal Si, introduced by the grafting of tetraethyl orthosilicate. Boehmite is formed by a mechanism of dissolution–precipitation. A significant decrease of alumina weathering to boehmite is evidenced for all dopants. For metal ions, the thermal conversion of doped γ‐Al2O3 into an alumina‐rich mixed oxide or the coverage of the alumina surface by particles of a poorly soluble oxide such as NiO contribute to the stabilization of the solid. Alumina dissolution and degradation are only inhibited fully through Si grafting. IR spectra in the OH stretching region suggest that the most reactive alumina sites toward dissolution are basic Al−OH sites located on lateral facets that are blocked upon Si introduction. Fischer–Tropsch reactivity shows that Co catalysts prepared on Mg2+‐ and Si‐doped supports are less active or, at best, as active as a reference Co/γ‐Al2O3 catalyst, which is explained by a lower reducibility of CoO on doped supports. The Co catalyst prepared on Mg2+‐doped γ‐Al2O3 calcined at 900 °C exhibits the best combination of catalytic activity, ease of preparation, and hydrothermal stability.

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Hydrogen from ethylene glycol by supercritical water reforming using noble and base metal catalysts

Cited by 58 publications

References 36 publications

Aqueous Phase Reforming of ethylene glycol – Role of intermediates in catalyst performance

Aqueous Phase Reforming of ethylene glycol – Role of intermediates in catalyst performance

Carbon Nanotubes: A Promising Catalyst Support Material for Supercritical Water Gasification of Biomass Waste

Inhibition by Inorganic Dopants of γ‐Alumina Chemical Weathering under Hydrothermal Conditions: Identification of Reactive Sites and their Influence in Fischer–Tropsch Synthesis

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