Co/MgO catalysts for hydrogenolysis of glycerol to 1, 2-propanediol

Guo, Xiaohui; Li, Yong; Shi, Ruijuan; Liu, Qi‐Ying; Zhan, Ensheng; Shen, Wenjie

doi:10.1016/j.apcata.2009.09.037

Cited by 100 publications

(86 citation statements)

References 31 publications

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“…Until now, supported Cu [3], Co [4], Ni [5], Ru [6], Pt [7], Rh [8] and Ir [9] catalysts have been reported to be active towards glycerol hydrogenolysis. However, the sintering of the metal particles during the course of the reaction often resulted in catalyst deactivation [10][11][12][13]. For example, the sintering of Cu particles in the Cu/ZnO catalysts reduced the conversion of glycerol from 46 to 10% upon reuse [10].…”

Section: Introductionmentioning

confidence: 99%

Glycerol Hydrogenolysis over Co Catalysts Derived from a Layered Double Hydroxide Precursor

Guo

Song

et al. 2011

Catal Lett

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Co catalysts, obtained from a layered double Co-Zn-Al hydroxide, are highly active and stable towards the hydrogenolysis of glycerol to 1,2-propanediol (1,2-PDO) in aqueous media. The Co-673 catalyst, containing a CoO species, provided a glycerol conversion of 67.7% and a 1,2-PDO selectivity of 50.5%. The Co-873 catalyst comprising 16 nm Co nanoparticles gave a glycerol conversion of 70.6% and a 1,2-PDO selectivity of 57.8%. It was revealed that the CoO species in the Co-673 catalyst was readily converted to 50 nm Co particles under the glycerol hydrogenolysis conditions. The Co catalysts maintained a stable size and phase in recycling tests.

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Section: Introductionmentioning

confidence: 99%

Glycerol Hydrogenolysis over Co Catalysts Derived from a Layered Double Hydroxide Precursor

Guo

Song

et al. 2011

Catal Lett

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“…32,33,43 Specifically, AuPd/MgO catalyst has been reported to be very selective for the aerobic oxidation of primary alcohols and polyols. 23,26 To The sol immobilization technique is the preferred method of preparing supported AuPd nanoalloy catalysts with precise control over the particle size, whereas the modified impregnation technique is preferred for controlling the metal particle size as well the composition of the bimetallic particles.…”

Section: Figure 1: Tga Curves Of Different Mgo Materialsmentioning

confidence: 99%

Deactivation studies of bimetallic AuPd nanoparticles supported on MgO during selective aerobic oxidation of alcohols

Montero

Alshammari

Dalebout

et al. 2017

Applied Catalysis A: General

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Here we report the synthesis and characterisation of high surface area MgO prepared via the thermal decomposition of various magnesium precursors (MgCO3, Mg(OH)2 and MgC2O4). Bimetallic gold-palladium nanoalloy particles were supported on these MgO materials and were tested as catalysts for the solvent-free selective aerobic oxidation of benzyl alcohol to benzaldehyde. All these catalysts were found to be active and very selective (>97%) to the desired product (benzaldehyde). However, MgO prepared via the thermal decomposition of magnesium oxalate displayed the highest activity among all the magnesium oxide supports tested. Attempts were made to unravel the reasons for the deactivation of these catalysts using different characterisation techniques namely in situ XRD, XPS, ICP-MS, TEM, and TGA-MS. From the data obtained, it is clear that MgO undergoes phase changes from MgO to Mg(OH)2 and MgCO3 during catalyst preparation as well as during the catalytic reaction. Besides phase changes, strong adsorption of reactants and products on the catalyst surface, during the reaction, were also observed and washing the catalyst with organic solvents did not completely remove them. The phase change and catalyst poisoning were reversed through high temperature heat treatments. However, these processes led to the sintering of the metal nanoparticles. Moreover, substantial leaching of the support material (MgO) was also observed during the reaction. These latter two processes led to the irreversible deactivation of AuPd nanoparticles supported on MgO catalyst during the solvent-free selective aerobic oxidation of alcohols. Among the three different MgO supports studied in this article, an inverse correlation between the catalytic activity and Mg leaching has been observed. This article reports a deeper understanding of the mode of deactivation observed in metal nanoparticles supported on MgO during liquid phase reactions.

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“…Various studies have been conducted in connection with the transformation of glycerol, such as steam reforming [2,3], hydrothermal [4,5], catalytic hydrogenation [6], the catalytic dehydration [7], pyrolysis [4,8], hydrogenolysis [9,10]. Those previous investigations produced both liquid compounds (methanol, formaldehyde, acetaldehyde and others) and gas compounds (CO2, butane, hydrogen and others).…”

Section: Introductionmentioning

confidence: 99%

Non-Catalytic and γ-Al2O3 Catalyst-based Degradation of Glycerol by Sonication Method

Kalla

Sumarno

Mahfud

2015

Bull. Chem. React. Eng. Catal.

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This research aims to study the effect of the addition of the catalyst γ-Al2O3 on the degradation of glycerol with using sonication method. This degradation reaction performed with the aid of a catalyst γ-Al2O3 or without a catalyst. Reactants were prepared from glycerol-water mixture with a mass ratio of 1:8. Experiment was carried out in a batch reactor at atmospheric pressure, temperature range between 30-70 °C for 10-90 min. The products, which were degraded from glycerol, were analyzed by gas chromatography (GC). The results showed that the ultrasonic wave radiation could degrade glycerol. The glycerol conversion was 2.92%-59.95% without employing catalyst, while the conversion of glycerol increased with adding γ-Al2O3.catalyst. It was found that methanol, allyl alcohol and acrolein were degradation products.

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Co/MgO catalysts for hydrogenolysis of glycerol to 1, 2-propanediol

Cited by 100 publications

References 31 publications

Glycerol Hydrogenolysis over Co Catalysts Derived from a Layered Double Hydroxide Precursor

Glycerol Hydrogenolysis over Co Catalysts Derived from a Layered Double Hydroxide Precursor

Deactivation studies of bimetallic AuPd nanoparticles supported on MgO during selective aerobic oxidation of alcohols

Non-Catalytic and γ-Al2O3 Catalyst-based Degradation of Glycerol by Sonication Method

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