Cu and Ni Catalysts Supported on γ-Al2O3and SiO2Assessed in Glycerol Steam Reforming Reaction

Thyssen, Vivian Vazquez; Maia, Thaisa Aparecida; Assaf, Elisabete Moreira

doi:10.5935/0103-5053.20140209

Cited by 14 publications

(20 citation statements)

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“…On the contrary, the Ni-Cu/SBA-15 catalyst achieved the lowest hydrogen production, since the addition of Cu to Ni-based catalysts can interfere with Ni availability on the surface of the material, thus hindering the Ni activity [38]. As a consequence, higher amounts of intermediate products (CH4 and CO) and lower amounts of final products (CO2 and H2) could be found for this sample.…”

Section: Catalytic Test On Glycerol Steam Reformimgmentioning

confidence: 94%

Production of Renewable Hydrogen from Glycerol Steam Reforming over Bimetallic Ni-(Cu,Co,Cr) Catalysts Supported on SBA-15 Silica

et al. 2017

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Glycerol steam reforming (GSR) is a promising alternative to obtain renewable hydrogen and help the economics of the biodiesel industry. Nickel-based catalysts are typically used in reforming reactions. However, the choice of the catalyst greatly influences the process, so the development of bimetallic catalysts is a research topic of relevant interest. In this work, the effect of adding Cu, Co, and Cr to the formulation of Ni/SBA-15 catalysts for hydrogen production by GSR has been studied, looking for an enhancement of its catalytic performance. Bimetallic Ni-M/SBA-15 (M: Co, Cu, Cr) samples were prepared by incipient wetness co-impregnation to reach 15 wt % of Ni and 4 wt % of the second metal. Catalysts were characterized by inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2-physisorption, X-ray powder diffraction (XRD), hydrogen temperature programmed reduction (H2-TPR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analyses (TGA), and tested in GSR at 600 °C and atmospheric pressure. The addition of Cu, Co, and Cr to the Ni/SBA-15 catalyst helped to form smaller crystallites of the Ni phase, this effect being more pronounced in the case of the NiCr/SBA-15 sample. This catalyst also showed a reduction profile shifted towards higher temperatures, indicating stronger metal-support interaction. As a consequence, the Ni-Cr/SBA-15 catalyst exhibited the best performance in GSR in terms of glycerol conversion and hydrogen production. Additionally, Ni-Cr/SBA-15 achieved a drastic reduction in coke formation compared to the Ni/SBA-15 material.

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Section: Catalytic Test On Glycerol Steam Reformimgmentioning

confidence: 94%

Production of Renewable Hydrogen from Glycerol Steam Reforming over Bimetallic Ni-(Cu,Co,Cr) Catalysts Supported on SBA-15 Silica

et al. 2017

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“…The addition of the Cu to the catalytic supports Al 2 O 3 and TiO 2 generated a decrease in the BET surface area, this reduction is due a blockage of the metal deposited in stricter pores or possible agglomeration of the metal on the surface, which would lead to a decrease of the area [24]. According to the IUPAC (International Union of Pure and Applied Chemistry) classification, the isotherms of adsorption / desorption of the reduced material was classified as type IV, which are characteristic of mesoporous materials with regular cylindrical and/or polyhedral pores (2nm ˂ ɸ Porous ≤ 50nm).…”

Section: Specific Surface Area Of Cu/tio2 and Cu/al2o3 Catalystsmentioning

confidence: 99%

“…Yu et al [29] also performed the analysis of the calcination temperature for Cu/TiO 2 catalyst verifying changes in the characteristics of the material as well as in different behaviours for application in the catalysis area. Thyssen et al [24] worked with Cu/Al 2 O 3 catalysts and the analysis of the calcination temperature reduced of the surface area. Oliveira et al [30] worked with Cu/Al 2 O 3 and found BET surface are and pore volume similar to the values found in this study.…”

Section: Specific Surface Area Of Cu/tio2 and Cu/al2o3 Catalystsmentioning

confidence: 99%

“…The γ-alumina (γ-Al2O3) containing Cu also is efficient and very used as supports at industrial applications due their high specific areas. However, the improvement of copper-based catalytic system is highly required [18,19,24]. Therefore, due to the technological importance of catalysts to hydrogen production for the generation of energy, the aim of this work is to determine aspects and properties textural, morphologic and structural of the Cu/Al 2 O 3 and Cu/TiO 2 catalysts with the following analyses XRD, SEM, BET and FTIR.…”

Section: Introductionmentioning

confidence: 99%

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Study of the structural and morphological properties of copper catalysts supported on Al2O3 and TiO2 synthesized by the impregnation method

Queiroz¹,

Barbosa²

2019

Matéria (Rio J.)

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Aluminum oxide and titanium oxide are widely used as catalytic support. Due to their characteristics and properties, they have several applications such as chemical processes, photocatalysis and pollution control. In this work, the catalytic supports of Al 2 O 3 and TiO 2 were impregnated with 2% of copper oxide by the method of impregnation. The catalysts were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Telle (BET) surface area and Infrared Spectroscopy techniques (FTIR). The results of XRD analysis presented the Cu/TiO 2 catalyst with high degree of crystallinity where the peaks corresponding to the phases anatase, rutile and CuO are easily found, while the Cu/Al 2 O 3 catalyst presented low degree of crystallinity. The samples morphology is in the form of agglomeration, the specific surface area was higher when copper metal was impregnated to the supports and the highest values was obtained with Cu/Al 2 O 3 catalyst. FTIR analysis allowed the visualization of the main vibrations of the functional groups presents in the catalysts samples. According to the results, it was observed that the incorporation of copper oxide did not affect significantly the crystalline structure of TiO 2 and Al 2 O 3 and that at the calcination temperature of 500°C it is possible to obtain a high specific surface area and a more active phase resulting in a good characterization which is suitable for various industrial applications.

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“…The resulting mixture is then dried at 160° C in oven for 4 hrs, followed by calcinations at 320° C for 3 hrs. In this way the catalyst is loaded on alumina support [9].…”

Section: Catalyst Casting On Supportmentioning

confidence: 99%

Preparation and Characterization of Bimetallic Fe-Co / Al2o3 for Hydrogenolysis of Glycerol

Gupta¹

2016

IJRET

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Production of value added chemical product from glycerol, used as a co-product in biodiesel, is essential in sustaining bio-diesel industry. The Fe-Co catalyst over alumina is developed and characterized for application in the hydrogenolysis of glycerol using in situ hydrogen, produced during dehydrogenation of glycerol to lactic acid. The catalyst Fe-Co was developed by wet impregnation method and was subsequently loaded on alumina. The loaded catalyst was characterized by FTIR, SEM and XRD to analyze their structure & structural morphology and their potential application for the hydrogenolysis reaction of glycerol is analyzed.

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Cu and Ni Catalysts Supported on γ-Al₂O₃and SiO₂Assessed in Glycerol Steam Reforming Reaction

Cited by 14 publications

References 1 publication

Production of Renewable Hydrogen from Glycerol Steam Reforming over Bimetallic Ni-(Cu,Co,Cr) Catalysts Supported on SBA-15 Silica

Production of Renewable Hydrogen from Glycerol Steam Reforming over Bimetallic Ni-(Cu,Co,Cr) Catalysts Supported on SBA-15 Silica

Study of the structural and morphological properties of copper catalysts supported on Al2O3 and TiO2 synthesized by the impregnation method

Preparation and Characterization of Bimetallic Fe-Co / Al2o3 for Hydrogenolysis of Glycerol

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