Gas-phase hydrogenation of furfural over Cu/CeO2 catalysts

Jiménez-Gómez, Carmen P.; Cecilia, Juan Antonio; Imanol, Marquez-Rodriguez; Moreno‐Tost, Ramón; Santamaría‐González, J.; Mérida‐Robles, J.; Maireles‐Torres, Pedro

doi:10.1016/j.cattod.2016.02.014

Cited by 77 publications

(58 citation statements)

References 55 publications

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“…However, this trend is not maintained for a higher copper content (60Cu-Bent), since a lower conversion (31%) is attained. All catalysts undergo a progressive deactivation with the TOS, reaching a maximum conversion of 83% with 45Cu-Bent catalyst, after 5 h. Concerning the selectivity pattern, the reaction products were only MF and FOL, according with results previously reported for Cu-based catalysts in FUR hydrogenation in gas phase [17,18,20,27,29]. All xCu-Bent catalysts favor the formation of FOL as main product, reaching the highest FOL yield of 72% after 5 h of TOS with the 45Cu-Bent catalyst.…”

Section: Catalytic Testssupporting

confidence: 76%

“…Cu 2p 3/2 core level spectra of supported catalysts (Figs. 4a and c) exhibit an intense signal located about 932.0 eV, which has been ascribed to reduced copper species (Cu 0/+ ) [18,29]. The absence of the shake-up satellite, typical of divalent copper, would discard its existence, although a very weak band could be distinguished in catalysts with high copper content.…”

Section: Physico-chemical Characterization Of Reduced Catalystsmentioning

confidence: 95%

“…4b, d). xCu-Bent and xCu-Sep catalysts show a broad band with two contributions: a main contribution close to 919.0 eV attributed to Cu 0 , and a smaller shoulder at 917.0 eV, typical of Cu + species [18,29]. Considering that the reduction temperature is 350 °C, the H 2 -TPR profiles revealed that all Cu-species must be reduced to this temperature, so the presence of Cu + species must be ascribed to a surface oxidation during the sample manipulation.…”

Section: Physico-chemical Characterization Of Reduced Catalystsmentioning

confidence: 97%

“…In addition, the physicochemical properties of the support could modify its electronic density. Thus, it is well know that the use of basic or amphoteric supports, such as MgO [27,28], ZnO [18] or CeO 2 [29], leads to catalytic systems with high activity in FUR hydrogenation. Moreover, weak acid supports, such as commercial silica [20], mesoporous MCM-41 [17,30] or SBA-15 [17] silica have been satisfactory evaluated in the selective FUR hydrogenation due to the silanol groups interact with the furfural or furfuryl alcohol [31,32].…”

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confidence: 99%

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Selective Furfural Hydrogenation to Furfuryl Alcohol Using Cu-Based Catalysts Supported on Clay Minerals

et al. 2017

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Section: Catalytic Testssupporting

confidence: 76%

Section: Physico-chemical Characterization Of Reduced Catalystsmentioning

confidence: 95%

Section: Physico-chemical Characterization Of Reduced Catalystsmentioning

confidence: 97%

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confidence: 99%

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Selective Furfural Hydrogenation to Furfuryl Alcohol Using Cu-Based Catalysts Supported on Clay Minerals

et al. 2017

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“…The obtained precipitate was aged for 4 h at 60 • C, and then at room temperature for 12 h. The solid was filtered and washed with deionised water to neutral pH to ensure the removal of Na + species. Finally, the solid was dried for 12 h at room temperature and calcined at 400 • C, maintaining this temperature for 4 h [66].…”

Section: Ceo 2 -Cuo From Freeze-drying (F-d)mentioning

confidence: 99%

Catalytic Behaviour of CuO-CeO2 Systems Prepared by Different Synthetic Methodologies in the CO-PROX Reaction under CO2-H2O Feed Stream

et al. 2017

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CuO-CeO 2 catalysts, with 6 wt % of Cu, have been synthesised by different preparation methods (calcination of nitrate precursors, thermal urea-nitrate combustion, freeze-drying method, using polymethyl metacrylate PMMA microspheres as template and precipitation using NaOH or the decomposition of urea as precipitating agents). The obtained materials have been characterised by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, N 2 adsorption-desorption at −196 • C, H 2 thermoprogrammed reduction (H 2 -TPR) and X-ray photoelectron spectroscopy (XPS). The catalysts displayed high dispersion of copper oxide, obtaining CO conversion values of 90-100% at 115 • C in the CO preferential oxidation in excess of hydrogen (CO-PROX) and maintaining this activity even after 48 h of time on stream. The incorporation of CO 2 and H 2 O in the feed stream (simulating a PROX unit) caused a decrease in the CO conversion, except for the catalyst synthesised using PMMA microspheres as a template which maintained a CO conversion of 95% at 115 • C. This catalyst exhibits an excellent catalytic performance, also under real operating conditions, thanks to many and concomitant factors, such as the very small CeO 2 particle size (5.6 nm), the surface being rich in copper (atomic ratio Cu/Ce = 0.35) that is easily reducible, and the peculiar morphology and porosity of the material.

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Nickel Phosphide/Silica Catalysts for the Gas‐Phase Hydrogenation of Furfural to High–Added–Value Chemicals

et al. 2017

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A series of Ni2P‐based catalysts supported on a commercial silica with a metallic Ni loading of 5–20 wt. % and an initial P/Ni molar ratio of 0–3 was prepared by incipient wetness impregnation. Catalyst precursors were reduced and characterized by using XRD, CO chemisorption, NH3 temperature‐programmed desorption, N2 adsorption–desorption at −196 °C, and X‐ray photoelectron spectroscopy and then tested in the gas‐phase hydrogenation of furfural. Almost full furfural conversion and a 2‐methylfuran yield of 73 % can be achieved with the Ni2P‐based catalyst with a Ni content of 15 wt. % at 190 °C after 5 h of time on stream. The high selectivity towards 2‐methylfuran is attributed to both the high hydrogenating capacity of the metallic sites to lead to furfuryl alcohol and the presence of reduced P species that favor the hydrogenolysis process. However, catalysts undergo deactivation along the catalytic test because of the formation of carbonaceous deposits in the form of coke and adsorption of reactants and/or products.

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Gas-phase hydrogenation of furfural over Cu/CeO2 catalysts

Cited by 77 publications

References 55 publications

Selective Furfural Hydrogenation to Furfuryl Alcohol Using Cu-Based Catalysts Supported on Clay Minerals

Selective Furfural Hydrogenation to Furfuryl Alcohol Using Cu-Based Catalysts Supported on Clay Minerals

Catalytic Behaviour of CuO-CeO2 Systems Prepared by Different Synthetic Methodologies in the CO-PROX Reaction under CO2-H2O Feed Stream

Nickel Phosphide/Silica Catalysts for the Gas‐Phase Hydrogenation of Furfural to High–Added–Value Chemicals

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