Hydrogenolysis of Glycerol in Gas Phase on Cu-Cr Mixed Oxide Catalyst Doped with Ni

Georgescu, V.; Panaitescu, Casen; Bombos, Mihaela; Bomboş, Dorin

doi:10.37358/rc.17.5.5624

Cited by 3 publications

(9 citation statements)

References 10 publications

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“…[166] Mixed oxide of Cu-Cr doped with NiO on γ-Al 2 O 3 was tested for gas phase GL hydrogenolysis at 473 K and 3-5 bar in a flow system reactor to produce 1,2-PD and HAc, as by-product. [167] In this case, the glycol selectivity was directly related to temperature and pressure increasing up to 95 % with 85 % GL conversion (at 5 bar and 493 K). [167] Nanometric Ni phosphides, in presence of citric acid, demonstrated to act as a chelating agent, proved to be a good catalyst to produce 1,2-PD under N 2 .…”

Section: Nickelmentioning

confidence: 81%

Transition Metal Catalysts for the Glycerol Reduction: Recent Advances

Coccia,

d'Alessandro,

Mascitti

et al. 2024

ChemCatChem

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Glycerol (GL) represents a widespread agro‐industrial waste. Its valorization is pivotal for a sustainable society because GL is a renewable compound deriving from biomass, but it has a high oxygen to carbon ratio, compared with feedstock used in the energy and chemistry sectors. Oxygen‐poor derivatives are easily and immediately transferable to the industry, avoiding a deep and pressing modification of the plants. From this perspective, keeping the carbon content but with an oxygen content reduction, we could effectively obtain the enhancement of the recovery and the use of GL converting it into attractive industrial building‐blocks. In this Review, we present and discuss the up‐to‐date results about the chemical reduction of GL into products with 3 carbon and 0, 1, or 2 oxygen atoms. The focus is on the transition metal (TM) catalysts that have made the hydrogenation reactions of GL possible, partitioning the metals into early and late, based on their position in the periodic table. This discussion will contribute to select and develop new catalysts aimed at the improvement of the yield and of the selectivity in the hydrogenation reactions of GL.

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Section: Nickelmentioning

confidence: 81%

Transition Metal Catalysts for the Glycerol Reduction: Recent Advances

Coccia,

d'Alessandro,

Mascitti

et al. 2024

ChemCatChem

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“…The triacetin (TAG), acetic acid (Ac) and water (W) number of moles in the mixture were calculated from the stoichiometric relations: (6) As none of the published models provided adequate simulation results, we developed a relatively simple, homogeneous type kinetic model, considering the rate expressions of the three reactions:…”

Section: Resultsmentioning

confidence: 99%

“…By its chemical structure and physical properties, the glycerol is one of the most versatile and valuable organic compounds. Chemically, glycerol is a highly functionalized molecule used in the synthesis of more than a thousand chemical products [1][2][3][4][5][6]. A great number of processes for glycerol conversion into commodity chemicals are based on the heterogeneous catalysis (hydrogenolysis, dehydration, etherification, esterification, oxidation, reforming etc.).…”

mentioning

confidence: 99%

A Kinetic Study of Glycerol Esterification with Acetic Acid Over a Commercial Amberlyst-35 Ion Exchange Resin

Banu¹,

Bozga²,

Bumbac³

et al. 2019

Rev. Chim.

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The increased quantities of glycerol available on the market initiated research efforts oriented to new valorization technologies, particularly by its conversion into medium tonnage chemicals, replacing petroleum derivatives. In this work it was investigated the valorization of glycerol by its transformation in glycerol acetates, by direct esterification with acetic acid, over a commercial Amberlyst-35 resin. Experiments were carried out batch-wise, in an autoclave reactor under controlled working conditions, at temperatures between 95 and 112 oC and initial acetic acid to glycerol molar ratios between 4 and 9. The experimental data evidenced that the glycerol conversion to monoacetate is faster than the next esterification steps. A relatively simple kinetic model was proposed and its parameters were evaluated from the experimental measurements. It proved reasonable predicting capacity for products distribution dependencies on the reactants molar ratio and reaction temperature.

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“…It was observed that with increasing the hydrogen molar ratio in the feed, glycerol conversion and selectivity to 1,2-PDO increased with a simultaneous decrease in the selectivity to acetol. 218 220 The SiO 2 supported Cu metal catalyst prepared by the ionexchange technique depicted an 87% yield of 1,2-PDO at 100% glycerol conversion at 255 °C and at 1.5 MPa pressure at a very higher hydrogen flow of 300 cm 3 /min. Furthermore, the catalytic activity and product selectivity were linearly increased with the specific copper surface area.…”

Section: Vapor Phase Hydrogenolysis Of Glycerolmentioning

confidence: 98%

“…However, the Ni/Al 2 O 3 catalyst was found to be very active in C–C bond breakage. It was suggested that the dehydration reaction was facilitated on the acidic sites (ZnO and Al 2 O 3 ) of the catalyst, and the hydrogenation of the intermediate was facilitated by copper metal …”

Section: Vapor Phase Hydrogenolysis Of Glycerolmentioning

confidence: 99%

Review of the Development of Heterogeneous Catalysts for Liquid and Vapor Phase Hydrogenolysis of Glycerol to Propylene Glycol (1,2-Propanediol): State-of-the-Art and Outlook

Pandey

Biswas

2023

Energy Fuels

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In the last two decades, various glycerol value addition techniques have been developed and discussed in the literature. Among all these processes, conversion of glycerol to 1,2-propanediol (1,2-PDO) has been recognized as one of the promising and commercially attractive glycerol value addition routes. This review is an attempt to scan out the progress in catalysts design and development for liquid and vapor phase glycerol hydrogenolysis for the production of 1,2-PDO. The development of supported and mixed metal oxide catalysts with their novel catalytic characteristics for glycerol conversion and 1,2-PDO selectivity has been scrutinized systematically. It was observed that among the nonnoble metal catalysts, Cu-based catalysts have shown promising activity toward 1,2-PDO; however, their stability is an issue. Among noble metals, Pt-and Ru-based catalysts were reported active for glycerol conversion. Comparatively, catalysts composed of Pt, Ru, Pd as a noble metal, and Cu as a non-noble metal have resulted in higher catalytic activity and 1,2-PDO selectivity. This review also summarizes different reaction pathways for hydrogenolysis of glycerol to 1,2-PDO, the effect of additives (solid acid and base), and methods of catalyst preparation on the catalyst performances. Further, glycerol hydrogenolysis with in situ H 2 production by glycerol reforming or by chemical transfer hydrogen using various hydrogen donors and the effect of different solvents on the glycerol hydrogenolysis process are also discussed. Reaction kinetic models are also included at the end.

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Hydrogenolysis of Glycerol in Gas Phase on Cu-Cr Mixed Oxide Catalyst Doped with Ni

Cited by 3 publications

References 10 publications

Transition Metal Catalysts for the Glycerol Reduction: Recent Advances

Transition Metal Catalysts for the Glycerol Reduction: Recent Advances

A Kinetic Study of Glycerol Esterification with Acetic Acid Over a Commercial Amberlyst-35 Ion Exchange Resin

Review of the Development of Heterogeneous Catalysts for Liquid and Vapor Phase Hydrogenolysis of Glycerol to Propylene Glycol (1,2-Propanediol): State-of-the-Art and Outlook

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