Ni-doped γ-Al2O3 as secondary catalyst for bio-syngas purification: influence of Ni loading, catalyst preparation, and gas composition on catalytic activity

Claude, Vincent; Mahy, Julien G.; Geens, Jérémy; Lambert, Stéphanie D.

doi:10.1016/j.mtchem.2019.05.002

Cited by 19 publications

(7 citation statements)

References 34 publications

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“…For the precursor suspension, the synthesis is as follows [18]: Aluminum(III) nitrate nonahydrate Al(NO 3 ) 3 •9H 2 O was dissolved in a deionized water/ethanol 3:1 mixture in a bottle under stirring. Amorphous aluminum hydroxide [Al(OH) 3 ] n was precipitated at room temperature by dropwise addition (1 mL/min) of aqueous ammonia NH 4 OH (30 wt.…”

Section: Ni Catalyst Suspension Preparationmentioning

confidence: 99%

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Coating Process of Honeycomb Cordierite Support with Ni/Boehmite Gels

et al. 2022

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This study presents the development of a method for the washcoating of Ni/boehmite gels, prepared by the sol–gel process, onto the surface of a commercial ceramic monolith. Indeed, a cordierite monolith in a honeycomb shape was used as the substrate for the Ni/Al2O3 deposition. An experimental assembly was made in order to apply the coating on the cordierite surface. Different suspensions were used with various viscosities, and multiple coating parameters were tested as the withdrawal speed, or the number of impregnations. It was observed that the simple deposition of the Ni/boehmite gel led to the formation of coating. Different morphologies were observed, and defects were highlighted as cracks, coating-free areas or aggregates. Among the various parameters studied, the pH of the sol appeared to play a role even more important than the viscosity. Indeed, the sol acidified with nitric acid showed a coating which was almost free of cracks or of large aggregates. Moreover, the use of a slurry mix of calcined alumina particles and colloidal boehmite appeared also as an interesting path. The beneficial influence of the slurry was attributed to a better resistance of the coating against the stresses induced during drying, and a deviation of the cracks in the gels by slurry grains.

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Section: Ni Catalyst Suspension Preparationmentioning

confidence: 99%

“…Ni/boehmite-based catalysts can be used in tar removal [18][19][20][21][22]. Indeed, Ni catalysts can be supported on many substrates as Al 2 O 3 , ZrO 2 , SiO 2 , Zeolites or Olivine [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Coating Process of Honeycomb Cordierite Support with Ni/Boehmite Gels

et al. 2022

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“…Nickel supported on oxides can be highlighted among these transition metals [30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Specifically, a variety of works have focused on the study of Ni catalysts supported in alumina such as Ni/gamma-Al2O3-SiO2 with different silicon precursors [44], nickel catalysts supported on hexaaluminates [45], Ni-doped γ-Al2O3 [46], Ni/Ce-Al2O3 [47], etc. As mentioned, the alumina is one of the most used supports, but it is not the only one.…”

Section: Introductionmentioning

confidence: 99%

Toluene steam reforming over nickel based catalysts

Sayas

Vivó

Costa-Serra

et al. 2021

International Journal of Hydrogen Energy

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Steam reforming of toluene (SRT) has been studied initially in eight nickel-based catalysts where nickel (10 wt.%) was incorporated in different supports (olivine, Al2O3, MgO, LDH, ZrO2, CeO2 and natural sepiolite) by the incipient wetness impregnation method. Among them, nickel catalyst based on sepiolite exhibited a promising catalytic performance, with a high conversion of toluene (16%), high selectivity to hydrogen (68.4%) and low production of undesired by-products (CO, CH4, ethylene and benzene) at low temperature (500 ºC). On the other hand, the incorporation of Ni in the sepiolitic material by precipitation (PP) has been considered as alternative method to the incipient wetness impregnation method (IWI). PP method allowed to prepare a Ni-based catalyst with a very high activity (conversion of toluene ~100%), high selectivity to hydrogen (73%) and lower production of undesirable by-products (5% CO, 2% CH4 and 0% C6H6) at 575 ºC. In addition, catalytic deactivation due to coke deposition and nickel sinterization was clearly lower for the catalyst synthesized by PP. Characterization by different physicochemical techniques (XRD, TEM, BET surface area, ICP-OES, TPR and EA) showed that PP method allowed to obtain a sepiolite-based catalyst containing Ni with larger external surface area and smaller, highly dispersed and easily reducible Ni metal particles. The results here discussed show that the Ni incorporation method has a clear influence in the preparation of nickel catalyst supported on sepiolite with improved catalytic performance in the steam reforming of toluene.

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“…In addition, the effects of catalytic temperature, the ratio of feedstock to catalyst, the properties of catalyst and other parameters on the distribution of products are important for catalytic co-pyrolysis of solid wastes. 8,9 Carbon materials, as one of the main products from the pyrolysis of solid wastes, are mainly produced at the temperature of 250-1000 °C with a heating rate of about 5-50 °C/min. 10 These carbon materials have high specific surface areas, abundant adsorption sites, good thermal stability, and controllable morphology, which exhibit huge potential as adsorbent for removing heavy metal ions, dyes and other pollutants in waste water.…”

Section: Introductionmentioning

confidence: 99%

Coked Ni/Al₂O₃ from the catalytic reforming of volatiles from co-pyrolysis of lignin and polyethylene: preparation, identification and application as a potential adsorbent

Zhao

Wang

et al. 2021

Catal. Sci. Technol.

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Ni-doped γ-Al2O3 as secondary catalyst for bio-syngas purification: influence of Ni loading, catalyst preparation, and gas composition on catalytic activity

Cited by 19 publications

References 34 publications

Coating Process of Honeycomb Cordierite Support with Ni/Boehmite Gels

Coating Process of Honeycomb Cordierite Support with Ni/Boehmite Gels

Toluene steam reforming over nickel based catalysts

Coked Ni/Al₂O₃ from the catalytic reforming of volatiles from co-pyrolysis of lignin and polyethylene: preparation, identification and application as a potential adsorbent

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Ni-doped γ-Al2O3 as secondary catalyst for bio-syngas purification: influence of Ni loading, catalyst preparation, and gas composition on catalytic activity

Cited by 19 publications

References 34 publications

Coating Process of Honeycomb Cordierite Support with Ni/Boehmite Gels

Coating Process of Honeycomb Cordierite Support with Ni/Boehmite Gels

Toluene steam reforming over nickel based catalysts

Coked Ni/Al2O3 from the catalytic reforming of volatiles from co-pyrolysis of lignin and polyethylene: preparation, identification and application as a potential adsorbent

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Product

Resources

About

Coked Ni/Al₂O₃ from the catalytic reforming of volatiles from co-pyrolysis of lignin and polyethylene: preparation, identification and application as a potential adsorbent