Catalytic degradation of aqueous Fischer–Tropsch effluents to fuel gas over oxide‐supported Ru catalysts and hydrothermal stability of catalysts

Chen, Lungang; Zhu, Yulei; Zheng, Hongyan; Zhang, Chenghua; Li, Yongwang

doi:10.1002/jctb.3719

Cited by 14 publications

(3 citation statements)

References 15 publications

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“…Therefore, we suggest this property to be of importance for the high activity. Since carbon supports usually possess a superior long‐term stability than Al 2 O 3 in aqueous media, Ru/C was chosen for further optimization of the reaction conditions.…”

Section: Methodsmentioning

confidence: 99%

Ruthenium Catalyzed Reductive Transformation of Itaconic Acid and Ammonia Into 3‐ and 4‐Methyl‐pyrrolidone

2018

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The reductive transformation of biogenic carboxylic acids and ammonia presents a promising route to access pyrrolidones as N‐containing bio‐based fine chemicals. Herein, we report the first approach to convert itaconic acid to N‐unsubstituted pyrrolidones. The reaction was carried out in low amounts of water as solvent with hydrogen as reduction agent and ammonia as nitrogen source. A Ru/C catalyst was found to be highly active for this reaction. Furthermore, a coherent reaction network could be proposed. Catalyst recycling and variation of substrates demonstrate both the robustness and broad scope of the presented catalytic system.

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Section: Methodsmentioning

confidence: 99%

Ruthenium Catalyzed Reductive Transformation of Itaconic Acid and Ammonia Into 3‐ and 4‐Methyl‐pyrrolidone

2018

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“…[35][36][37] Relevant to the present work, Chen et al reported the degradation of oxygenates to hydrocarbons under a H 2 pressure of 98 bar using a Ru catalyst. 38,39 This reaction involves acid-catalyzed dehydration of alcohols and subsequent hydrogenation to paraffins. 40 The reaction mixture in the work of Chen et al was slightly acidic due to the presence of organic acids.…”

Section: Catalytic Activity Measurementsmentioning

confidence: 99%

“…40 The reaction mixture in the work of Chen et al was slightly acidic due to the presence of organic acids. 38,39 To exclude the possibility that the selectivity changes as a function of temperature are caused by secondary reactions of aldehydes and alcohols in the present work, we carried out several additional FT reactions in the presence of decanal. Shorter chain aldehydes could not be used for this purpose because it was not possible to analyze them nor their products in our aqueous-phase FT approach.…”

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Structure sensitivity in the ruthenium nanoparticle catalyzed aqueous-phase Fischer–Tropsch reaction

Quek

Pestman

Santen

et al. 2014

Catal. Sci. Technol.

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General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Structure sensitivity in the ruthenium nanoparticle catalyzed aqueous-phase Fischer-Tropsch reaction Xian-Yang Quek, Robert Pestman, Rutger A. van Santen and Emiel J. M. Hensen * Low-temperature Fischer-Tropsch reaction data are reported for Ru nanoparticles suspended in the water phase. Their activity and selectivity strongly depends on particle size, when varied between 1 to 5 nm. Small particles display high oxygenates selectivity. The Anderson-Schulz-Flory (ASF) chain-growth probability for oxygenates is significantly lower than that observed for hydrocarbons. The chain growth parameter for hydrocarbon formation is independent of particle size. For oxygenates it is constant only for particles larger than 3 nm. Oxygenate and hydrocarbon formation occur on different sites. The ASF chain-growth probability for oxygenate formation increases with temperature. For very small 1.2 nm particles it shows a maximum as a function of temperature. This unusual temperature dependence is due to relatively slow CO dissociation compared to the rate of C-C bond formation.

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Catalytic functionalities of nano Ru catalysts supported on TiO2–ZrO2 mixed oxide for vapor phase hydrogenolysis of glycerol to propanediols

et al. 2015

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Vapor phase hydrogenolysis of glycerol was studied over Ru catalysts supported on TiO 2 -ZrO 2 binary oxide. Ru catalysts with various ruthenium loadings from 1.0 to 6.0 wt% were prepared by deposition-precipitation method on the TiO 2 -ZrO 2 mixed oxide support. These catalysts were characterized by X-ray diffraction, H 2 temperature-programmed reduction, NH 3 temperatureprogrammed desorption, transmission electron microscopy, BET surface area, XPS and CO chemisorption measurements. The catalysts exhibited superior performance for the vapor phase hydrogenolysis of glycerol at moderate temperature and atmospheric pressure. The mixed oxide support plays a significant role in improving the catalytic activity for the production of propanediols. The glycerol conversion and the selectivity of various products depend on the catalyst preparation method and also on the Ru content. The influence of acidity of the catalyst and its correlation to the catalytic performance (selectivity and conversion) has been studied. The weak and strong acidic sites of the catalysts measured by NH 3 -TPD play a key role in selective formation of 1,2-propanediol and 1,3-propanediol. XRD, TEM, XPS and CO chemisorption studies revealed that ruthenium was well dispersed on TiO 2 -ZrO 2 which further contributed to the superior catalytic activity for glycerol hydrogenolysis.

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Catalytic degradation of aqueous Fischer–Tropsch effluents to fuel gas over oxide‐supported Ru catalysts and hydrothermal stability of catalysts

Cited by 14 publications

References 15 publications

Ruthenium Catalyzed Reductive Transformation of Itaconic Acid and Ammonia Into 3‐ and 4‐Methyl‐pyrrolidone

Ruthenium Catalyzed Reductive Transformation of Itaconic Acid and Ammonia Into 3‐ and 4‐Methyl‐pyrrolidone

Structure sensitivity in the ruthenium nanoparticle catalyzed aqueous-phase Fischer–Tropsch reaction

Catalytic functionalities of nano Ru catalysts supported on TiO2–ZrO2 mixed oxide for vapor phase hydrogenolysis of glycerol to propanediols

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