Metal-exchanged magnetic β-zeolites: valorization of lignocellulosic biomass-derived compounds to platform chemicals

Jorge, Erlen Y. C.; Lima, Thiago M.; Marchini, Lucas; Castelblanco, William N.; Rivera, Daniel G.; Urquieta‐González, Ernesto A.; Varma, Rajender S.; Paixão, Márcio W.

doi:10.1039/c7gc01178d

Cited by 37 publications

(33 citation statements)

References 79 publications

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“…The data demonstrates that all of the zeolites attain significant (up to almost 8 wt.%) amounts of carbon during the reaction. 79 These results reinforce the notion that carbon is deposited inside the catalyst pores in the form of fine, amorphous particles. Similar effect was reported in literature for methane dry reforming on Ni-Co/Al 2 O 3 -ZrO 2 catalysts.…”

Section: Carbon Deposition On Pure Zeolitessupporting

confidence: 75%

Plasma‐activated methane partial oxidation reaction to oxygenate platform chemicals over Fe, Mo, Pd and zeolite catalysts

et al. 2019

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Summary Natural gas from stranded sources is being predominantly flared, and there is a growing demand for new technologies for its utilisation, where electrification, flexibility, and modularity play an important role. Plasma‐activated methane partial oxidation reaction was studied in a designed dielectric barrier discharge ionisation reactor unit, producing value‐added platform chemicals, namely, methanol, formaldehyde, intermediate formic acid, acetic acid, and paraformaldehyde at ambient temperature and atmospheric pressure. The effects of various process parameters, such as voltage, total convertible gas flow rate, and reagent ratio relationship, were considered. In addition, coupling of the following catalytic materials with plasma was examined: alumina (Al2O3), chabazite, ferrierite, microporous beta zeolite, silica (SiO2) glass beads, ZSM‐5 (MFI), Fe on H‐ZSM‐5 and Al2O3, Mo on H‐ZSM‐5, TiO2 and SiO2, and Pd on Al2O3. In the liquid product, 21.5% CH3OH, 20.4% CH2O, 0.3% HCOOH, and 2.4% CH3COOH were measured when using pure plasma, and a maximum aggregate yield of the organic oxygenate compounds of 5.21 mol.% was achieved. The usage of shaped silicate surface increased the selectivity towards synthesised oxygen‐containing structures, while the application of alumino‐silicate mixture constituents reduced it. It was determined that elementary covalently bonded carbon was formed inside pores when pure zeolites were used. Fe‐ and Pd‐based heterogeneous catalysts favoured the complete exothermic combustion of CH4 feedstock reactant species, and the liquid product consisted only of water in the Pd‐ case. The utilisation of Mo/H‐ZSM‐5 resulted in a 46% increased yield of formalin. A mechanism for the role of Mo was proposed, where Mo oxidises methanol to formaldehyde and the metal is reoxidised in plasma.

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Section: Carbon Deposition On Pure Zeolitessupporting

confidence: 75%

Plasma‐activated methane partial oxidation reaction to oxygenate platform chemicals over Fe, Mo, Pd and zeolite catalysts

et al. 2019

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“…In the absence of catalyst the only product is 2-(diisopropoxymethyl)furan (DPMF) with a yield of 10 %, which is formed by the acetalization of F with two molecules of 2-propanol. [25,26] This product is also observed over the commercial Al 2 O 3 (DPMF = 5 %), together with a minor amount of FA (7 %). The ability of Al 2 O 3 to catalyse the CTH of F has been recently reported although a large catalyst amount was required to work efficiently.…”

Section: Furfural Conversion Over Hydrotalcite-derived Catalystsmentioning

confidence: 65%

“…Contrary to the other two prepared catalysts that present DPMF yields of 2 and 5 %, the Co 3 O 4 −Al 2 O 3 sample did not catalyse the acetalization of F with 2‐propanol. The only side‐product over the Co 3 O 4 −Al 2 O 3 was 2‐(isopropoxymethyl)furan (PMF) with a negligible yield of 1 %, which is formed by the etherification of FA with 2‐propanol (Figure ) . This result implies an outstanding selectivity of 97 % for FA production.…”

Section: Resultsmentioning

confidence: 99%

“…Control experiments with no catalysts or employing commercial γ‐Al 2 O 3 (Sigma‐Aldrich) show a poor conversion of F after 6 h (≤13 %). In the absence of catalyst the only product is 2‐(diisopropoxymethyl)furan (DPMF) with a yield of 10 %, which is formed by the acetalization of F with two molecules of 2‐propanol . This product is also observed over the commercial Al 2 O 3 (DPMF=5 %), together with a minor amount of FA (7 %).…”

Section: Resultsmentioning

confidence: 99%

“…Textural properties [c] Basic properties [d] Acid properties [ FA with 2-propanol ( Figure 3). [26] This result implies an outstanding selectivity of 97 % for FA production. Since the calculated carbon mass balances were higher than 97 % in all the experiments, the presence of a significant undetected fraction of other by-products was discarded.…”

Section: Furfural Conversion Over Hydrotalcite-derived Catalystsmentioning

confidence: 97%

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Catalytic Transfer Hydrogenation of Furfural over Co₃O₄−Al₂O₃ Hydrotalcite‐derived Catalyst

et al. 2020

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The hydrogenation of furfural by catalytic hydrogen transfer to produce furfuryl alcohol has been investigated over a series of mixed oxides derived from hydrotalcite catalysts. Three different catalysts containing Ni, Co and Zn phases on an Al‐rich amorphous support were synthesized and characterised. The catalytic performances were evaluated in a batch stirred reactor using 2‐propanol as a solvent and hydrogen donor, with Co3O4−Al2O3 showing the highest activity and selectivity to FA (74 % yield; 97 % selectivity). The effects of temperature (T=120–180 °C) and reaction time (t=30 min–24 h) were also studied, reaching a FA maximum yield of 92 % at 150 °C after 24 h. The Co3O4−Al2O3 catalyst showed a loss of activity after the first run, which can be easily restored by a simple calcination treatment. The results establish a catalytic route to produce valuable furfuryl alcohol over 3d‐transition metal‐based catalysts without any external hydrogen supply.

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One‐Pot Synthesized Nickel‐Doped Hierarchically Porous Beta Zeolite for Enhanced Methanol Electrocatalytic Oxidation Activity

Wei

Hua

et al. 2020

ChemCatChem

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Hierarchically porous zeolites have been widely explored for catalytic applications owing to their high specific surface area, large pore volume, favorable mass transfer capability and abundant acidic sites. Herein we report the facile synthesis of Ni‐doped hierarchically Beta zeolite (Ni−H‐beta) via one‐pot hydrothermal method, in which Ni is uniformly doped into the zeolite crystalline skeleton in the form of Ni3+ without any nickel oxides being found. The prepared Ni−H‐beta zeolite shows high performance towards the electrocatalytic methanol oxidation reaction (MOR) with a high current density of 1450 A g−1 at 1.65 V vs RHE, which is higher than most non‐precious MOR electrocatalysts. More importantly, the electrochemical MOR performance has been identified to be closely related to the acidic property of the prepared samples. The increase in Al concentration resulted in the formation of strong acid sites, and the consequent MOR activity enhancement. These results provide valuable knowledge and favor the application of transition metals doped hierarchical zeolite for electrocatalytic MOR.

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Metal-exchanged magnetic β-zeolites: valorization of lignocellulosic biomass-derived compounds to platform chemicals

Abstract: An array of Pd, Fe and Ir exchanged β-zeolites were synthesized, fully characterized, and their catalytic activity evaluated in converting bio-derived compounds to value-added platform chemicals.

Cited by 37 publications

References 79 publications

Plasma‐activated methane partial oxidation reaction to oxygenate platform chemicals over Fe, Mo, Pd and zeolite catalysts

Plasma‐activated methane partial oxidation reaction to oxygenate platform chemicals over Fe, Mo, Pd and zeolite catalysts

Catalytic Transfer Hydrogenation of Furfural over Co₃O₄−Al₂O₃ Hydrotalcite‐derived Catalyst

One‐Pot Synthesized Nickel‐Doped Hierarchically Porous Beta Zeolite for Enhanced Methanol Electrocatalytic Oxidation Activity

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Metal-exchanged magnetic β-zeolites: valorization of lignocellulosic biomass-derived compounds to platform chemicals

Abstract: An array of Pd, Fe and Ir exchanged β-zeolites were synthesized, fully characterized, and their catalytic activity evaluated in converting bio-derived compounds to value-added platform chemicals.

Cited by 37 publications

References 79 publications

Plasma‐activated methane partial oxidation reaction to oxygenate platform chemicals over Fe, Mo, Pd and zeolite catalysts

Plasma‐activated methane partial oxidation reaction to oxygenate platform chemicals over Fe, Mo, Pd and zeolite catalysts

Catalytic Transfer Hydrogenation of Furfural over Co3O4−Al2O3 Hydrotalcite‐derived Catalyst

One‐Pot Synthesized Nickel‐Doped Hierarchically Porous Beta Zeolite for Enhanced Methanol Electrocatalytic Oxidation Activity

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Catalytic Transfer Hydrogenation of Furfural over Co₃O₄−Al₂O₃ Hydrotalcite‐derived Catalyst