Effect of tungsten surface density of WO<sub>3</sub>–ZrO<sub>2</sub> on its catalytic performance in hydrogenolysis of cellulose to ethylene glycol

Chai, Jiachun; Zhu, Shengyun; Cen, Youliang; Guo, Jing; Wang, Jianguo; Fan, Weibin

doi:10.1039/c6ra27524a

Cited by 53 publications

(38 citation statements)

References 55 publications

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“…This disadvantage could be compensated by optimization of the catalyst preparation. In particular, the calcination temperature, which has a decisive influence on the activity and selectivity of Zr/W systems, should be optimized in further studies . This should be subject to further research.…”

Section: Discussionmentioning

confidence: 99%

“…Good yields of lactic acid and 2,5‐hexanedione were observed with tungstated zirconia . Good yields of ethylene glycol from cellulose were obtained with a WO 3 ‐ZrO 2 catalyst in combination with Ru/C …”

Section: Introductionmentioning

confidence: 99%

“…[25] Good yields of ethylene glycol from cellulose were obtained with a WO 3 -ZrO 2 catalystinc ombinationw ith Ru/C. [32]…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermally Stable Ruthenium–Zirconium–Tungsten Catalyst for Cellulose Hydrogenolysis to Polyols

2017

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In this work, we describe a catalytic material based on a zirconium–tungsten oxide with ruthenium for the hydrogenolysis of microcrystalline cellulose under hydrothermal conditions. With these catalysts, polyols can be produced with high yields. High and stable polyol yields were also achieved in recycling tests. A catalyst with 4.5 wt % ruthenium in total achieved a carbon efficiency of almost 100 %. The prepared Zr‐W oxide is mesoporous and largely stable under hydrothermal conditions (493 K and 65 bar hydrogen). Decomposition into the components ZrO2 and WO3 could be observed at temperatures of 1050 K in air.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrothermally Stable Ruthenium–Zirconium–Tungsten Catalyst for Cellulose Hydrogenolysis to Polyols

2017

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“…Moreover, a partial pore blockage by nickel particle species deposited over the supports' surface during catalyst preparation is also likely . In addition, Chai et al (2017) have reported that at high calcination temperatures the SSA of tungstated zirconia declines due to the sintering of ZrO 2 , which is also accompanied by a significant rise in the tungsten surface density. The N 2 adsorption-desorption isotherms at −196 • C of the reduced catalysts are shown in Figure 1; their corresponding PSD characteristics are presented as insets.…”

Section: Textural and Structural Characterizationmentioning

confidence: 99%

“…The origin of these differences can be attributed to the existence of higher concentration of anionic defects on m-ZrO 2 than on t-ZrO 2 . The different symmetry and spacing of the OH and Zr-O bonds at tetragonal ZrO 2 and monoclinic ZrO 2 can play an important role in the dispersion of the active metal component and consequently on the properties of the catalytic systems (Chai et al, 2017;Silveira et al, 2017). Sato et al (2013) investigating the effect of the ZrO 2 phase on the structure and behavior of supported Cu catalysts for ethanol conversion, concluded that the activity of Cu/ZrO 2 catalysts is strongly dependent on the phase structure of ZrO 2 , as Cu catalysts supported over monoclinic ZrO 2 were found more active than catalysts with the same Cu surface density deposited on tetragonal ZrO 2 .…”

Section: Textural and Structural Characterizationmentioning

confidence: 99%

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Charisiou

Siakavelas

Papageridis

et al. 2017

Front. Environ. Sci.

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The time-on-stream catalytic performance and stability of 8 wt. % Ni catalyst supported on two commercially available catalytic supports, ZrO 2 and 15 wt.% WO 3 -ZrO 2 , was investigated under the biogas dry reforming reaction for syngas production, at 750 • C and a biogas quality equal to CH 4 /CO 2 = 1.5, that represents a common concentration of real biogas. A number of analytical techniques such as N 2 adsorption/desorption (BET method), XRD, H 2 -TPR, NH 3 -and CO 2 -TPD, SEM, ICP, thermal analysis (TGA/DTG) and Raman spectroscopy were used in order to determine textural, structural and other physicochemical properties of the catalytic materials, and the type of carbon deposited on the catalytic surface of spent samples. These techniques were used in an attempt to understand better the effects of WO 3 -induced modifications on the catalyst morphology, physicochemical properties and catalytic performance. Although Ni dispersion and reducibility characteristics were found superior on the modified Ni/WZr sample than that on Ni/Zr, its dry reforming of methane (DRM) performance was inferior; a result attributed to the enhanced acidity and complete loss of the basicity recorded on this catalyst, an effect that competes and finally overshadows the benefits of the other superior properties. Raman studies revealed that the degree of graphitization decreases with the insertion of WO 3 in the crystalline structure of the ZrO 2 support, as the I D /I G peak intensity ratio is 1.03 for the Ni/Zr and 1.29 for the Ni/WZr catalyst.

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Toward Replacing Ethylene Oxide in a Sustainable World: Glycolaldehyde as a Bio‐Based C₂ Platform Molecule

et al. 2020

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Fossil‐based platform molecules such as ethylene and ethylene oxide currently serve as the primary feedstock for the C2‐based chemical industry. However, in the search for a more sustainable chemical industry, fossil‐based resources may preferentially be replaced by renewable alternatives, provided there is realistic economic feasibility. This Review compares and critically discusses several production routes toward bio‐based structural analogues of ethylene oxide and the required adaptations for their implementation in state‐of‐the‐art C2‐based chemical processes. For example, glycolaldehyde, a structural analogue obtainable from carbohydrates by atom‐economic retro‐aldol reactions, may replace ethylene oxide's leading role. This alternative chemical route may not only allow the carbon footprint of conventional chemicals production to be lowered, but the introduction of a bio‐based pathway may also contribute to safer production processes. Where possible, challenges, drawbacks, and prospects are highlighted.

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Effect of tungsten surface density of WO₃–ZrO₂ on its catalytic performance in hydrogenolysis of cellulose to ethylene glycol

Abstract: New understanding on reaction mechanism of cellulose hydrogenolysis to ethylene glycol over WO3–ZrO2 catalyst combined with Ru/C.

Cited by 53 publications

References 55 publications

Hydrothermally Stable Ruthenium–Zirconium–Tungsten Catalyst for Cellulose Hydrogenolysis to Polyols

Hydrothermally Stable Ruthenium–Zirconium–Tungsten Catalyst for Cellulose Hydrogenolysis to Polyols

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Toward Replacing Ethylene Oxide in a Sustainable World: Glycolaldehyde as a Bio‐Based C₂ Platform Molecule

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Effect of tungsten surface density of WO3–ZrO2 on its catalytic performance in hydrogenolysis of cellulose to ethylene glycol

Abstract: New understanding on reaction mechanism of cellulose hydrogenolysis to ethylene glycol over WO3–ZrO2 catalyst combined with Ru/C.

Cited by 53 publications

References 55 publications

Hydrothermally Stable Ruthenium–Zirconium–Tungsten Catalyst for Cellulose Hydrogenolysis to Polyols

Hydrothermally Stable Ruthenium–Zirconium–Tungsten Catalyst for Cellulose Hydrogenolysis to Polyols

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Toward Replacing Ethylene Oxide in a Sustainable World: Glycolaldehyde as a Bio‐Based C2 Platform Molecule

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Resources

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Effect of tungsten surface density of WO₃–ZrO₂ on its catalytic performance in hydrogenolysis of cellulose to ethylene glycol

Toward Replacing Ethylene Oxide in a Sustainable World: Glycolaldehyde as a Bio‐Based C₂ Platform Molecule