Platinum, palladium and nickel supported on Fe 3 O 4  as catalysts for glycerol aqueous-phase hydrogenolysis and reforming

Soares, André Von‐Held; Atia, Hanan; Armbruster, Udo; Passos, Fábio B.; Martin, Andreas

doi:10.1016/j.apcata.2017.07.023

Cited by 38 publications

(26 citation statements)

References 80 publications

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“…4 Mean particle size of nickel-rich phase. 5 Boehmite crystallite size calculated from Scherrer equation. 6 Raso et al [18].…”

Section: Catalyst Characterizationmentioning

confidence: 99%

“…Therefore, the conversion of glycerol into value-added products, such as H 2 and 1,2-propanediol, among others, is a method to improve the economics of biodiesel as it has been the case during the last decade. Many works have been published on aqueous phase hydrogenolysis (APH) of glycerol using different catalysts such as: noble metals (Pt, Ru, Pd or Rh), transition metals (Ni, Cu or Zr) and bi-metallics (Ni-Cu or Pt-Fe) supported on activated carbon, several oxides, or mixed oxides [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Study of Ni/Al-Fe Catalyst Stability in the Aqueous Phase Hydrogenolysis of Glycerol

et al. 2020

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The present work studied the stability and reusability of Ni/Al-Fe catalyst in the aqueous phase hydrogenolysis of glycerol without external hydrogen addition. The catalyst based on 28 molar % of Ni with 3/1 molar ratio of Al/Fe was prepared through co-precipitation. This catalyst presented the best performance in our last study which compares several Ni/Al-Fe catalysts with different molar ratios of Al/Fe. To see the influence of the pressurized water on the physicochemical characteristics of Ni/Al-Fe catalyst, a test of up to 9 h has been carried out. Fresh and used catalysts were characterized by various techniques: X-ray Diffraction (XRD), N2-physisorption, field emission scanning electron microscopy (FESEM) and STEM. Glycerol conversion and carbon yield to gases and liquids did not vary significantly when compared at 3 h and 9 h. Furthermore, the morphology of the catalyst remains stable after continuous recycling under severe hydrothermal conditions. The nickel rich phase of the catalyst, which was determined by XRD and scanning transmission electron microscopy (STEM) techniques, showed a stable size after 9 h under reaction.

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“…4 Mean particle size of nickel-rich phase. 5 Boehmite crystallite size calculated from Scherrer equation. 6 Raso et al [18].…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of Ni/Al-Fe Catalyst Stability in the Aqueous Phase Hydrogenolysis of Glycerol

et al. 2020

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“…Metal oxides with tunable redox properties can also be used as efficient catalytic promoters for metal catalysts. Passos and co‐workers reported Pd/Fe 3 O 4 hybrid materials for efficient CTH‐I of glycerol at 230 °C . Surface characterization by means of temperature‐programmed reduction suggested that the presence of Pd might facilitate Fe 3+ reduction at the Pd–Fe 3 O 4 interface.…”

Section: Case Study A: Polyol Conversionmentioning

confidence: 99%

“…Passos and co-workersr eported Pd/Fe 3 O 4 hybrid materials for efficient CTH-I of glycerola t2 30 8C. [45] Surface characterization by means of temperature-programmed reduction suggestedt hat the presence of Pd might facilitate Fe 3 + reduction at the Pd-Fe 3 O 4 interface. Such effects favor Pd dispersion (particle size % 4nm).…”

Section: Cth-i Routementioning

confidence: 99%

Catalytic Transfer Hydrogenation of Biomass‐Derived Substrates to Value‐Added Chemicals on Dual‐Function Catalysts: Opportunities and Challenges

et al. 2018

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Aqueous‐phase hydrodeoxygenation (APH) of bioderived feedstocks into useful chemical building blocks is one the most important processes for biomass conversion. However, several technological challenges, such as elevated reaction temperature (220–280 °C), high H2 pressure (4–10 MPa), uncontrollable side reactions, and intensive capital investment, have resulted in a bottleneck for the further development of existing APH processes. Catalytic transfer hydrogenation (CTH) under much milder conditions with non‐fossil‐based H2 has attracted extensive interest as a result of several advantageous features, including high atom efficiency (≈100 %), low energy intensity, and green H2 obtained from renewable sources. Typically, CTH can be categorized as internal H2 transfer (sacrificing small amounts of feedstocks for H2 generation) and external H2 transfer from H2 donors (e.g., alcohols, formic acid). Although the last decade has witnessed a few successful applications of conventional APH technologies, CTH is still relatively new for biomass conversion. Very limited attempts have been made in both academia and industry. Understanding the fundamentals for precise control of catalyst structures is key for tunable dual functionality to combine simultaneous H2 generation and hydrogenation. Therefore, this Review focuses on the rational design of dual‐functionalized catalysts for synchronous H2 generation and hydrogenation of bio‐feedstocks into value‐added chemicals through CTH technologies. Most recent studies, published from 2015 to 2018, on the transformation of selected model compounds, including glycerol, xylitol, sorbitol, levulinic acid, hydroxymethylfurfural, furfural, cresol, phenol, and guaiacol, are critically reviewed herein. The relationship between the nanostructures of heterogeneous catalysts and the catalytic activity and selectivity for C−O, C−H, C−C, and O−H bond cleavage are discussed to provide insights into future designs for the atom‐economical conversion of biomass into fuels and chemicals.

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“…Huber et al studied the APR of ethylene glycol over Pd/Al 2 O 3 catalysts and found that the APR activity can be increased by adding Fe 2 O 3 that acted as a WGS promoter [37]. In addition, the formation of Fe 3 O 4 via Fe 2 O 3 reduction can increase the number of Lewis acid sites [38]. The stronger Pt-metal oxide nanoparticle interaction with weaker surface acidity enhanced the H 2 productivity and inhibited coke formation [39].…”

Section: Catalytic Activity Of Catalystsmentioning

confidence: 99%

In-Situ Liquid Hydrogenation of m-Chloronitrobenzene over Fe-Modified Pt/Carbon Nanotubes Catalysts

et al. 2018

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Abstract:In-situ liquid-phase hydrogenation of m-chloronitrobenzene (m-CNB) based on aqueous-phase reforming (APR) of ethanol and catalytic hydrogenation was carried out over Fe-modified Pt/carbon nanotubes (CNTs) catalysts. The effects of Pt loading over CNTs and Fe modification on the catalytic performance of Pt/CNTs catalysts were studied. In-tube loading of Pt particles, compared with out-tube loading, considerably improved the catalytic activity. With in-tube loading, Fe-modified Pt/CNTs catalysts further improved the m-CNB in-situ hydrogenation performance. After Fe modification, Pt-Fe/CNTs catalysts formed, inside CNTs, a Pt-Fe alloy and iron oxides, which both improved catalytic hydrogenation performance and significantly enhanced ethanol APR hydrogen producing performance, thereby increasing the m-CNB in-situ hydrogenation reactivity.

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Platinum, palladium and nickel supported on Fe 3 O 4 as catalysts for glycerol aqueous-phase hydrogenolysis and reforming

Cited by 38 publications

References 80 publications

Study of Ni/Al-Fe Catalyst Stability in the Aqueous Phase Hydrogenolysis of Glycerol

Study of Ni/Al-Fe Catalyst Stability in the Aqueous Phase Hydrogenolysis of Glycerol

Catalytic Transfer Hydrogenation of Biomass‐Derived Substrates to Value‐Added Chemicals on Dual‐Function Catalysts: Opportunities and Challenges

In-Situ Liquid Hydrogenation of m-Chloronitrobenzene over Fe-Modified Pt/Carbon Nanotubes Catalysts

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