Articles producció científica> Enginyeria Química

Synthetic natural gas by direct CO2 hydrogenation on activated takovites: Effect of Ni/Al molar ratio

  • Identification data

    Identifier: PC:1526
    Authors:
    S. AbellóC. BerruecoF. Gispert-GuiradoD. Montané
    Abstract:
    Takovite-derived mixed oxides in Ni/Al molar ratios from 1 to 3 have been used as catalysts in hydrogenation of CO2 to CH4. The catalysts were characterized by XRD, BET, TEM, TGA, and H2-TPR, and monitored by in situ DRIFTS under reaction conditions. The catalytic performance for the CO2 methanation has been investigated in a fixed-bed reactor at the temperature range from 225 to 400°C and pressures of 10.0 and 1.0 bar(g). Takovite decomposition leads to the formation of a NiO phase containing Al ions and a nickel-containing alumina phase (Ni-deficient spinel). The percentage of spinel increases upon decreasing the Ni/Al ratio, and consequently, a lower amount of metallic nickel after subsequent reduction is achieved. All catalysts were partially reduced upon time on stream, leading to the formation of small Ni0 crystallites (ca. 3 nm) dispersed on a NiAl2O4 matrix. The most active and selective catalyst was the one with a Ni/Al ratio of 2, which was also very stable after a 500 h lifetime test at atmospheric pressure and 275°C.
  • Others:

    Author, as appears in the article.: S. Abelló; C. Berrueco; F. Gispert-Guirado; D. Montané
    Department: Enginyeria Química
    URV's Author/s: ABELLÓ CROS, SÒNIA; C. Berrueco; GISPERT GUIRADO, FRANCESC; MONTANÉ CALAF, DANIEL
    Keywords: Hydrogenation of CO Synthetic natural gas hydrogenation
    Abstract: Takovite-derived mixed oxides in Ni/Al molar ratios from 1 to 3 have been used as catalysts in hydrogenation of CO2 to CH4. The catalysts were characterized by XRD, BET, TEM, TGA, and H2-TPR, and monitored by in situ DRIFTS under reaction conditions. The catalytic performance for the CO2 methanation has been investigated in a fixed-bed reactor at the temperature range from 225 to 400°C and pressures of 10.0 and 1.0 bar(g). Takovite decomposition leads to the formation of a NiO phase containing Al ions and a nickel-containing alumina phase (Ni-deficient spinel). The percentage of spinel increases upon decreasing the Ni/Al ratio, and consequently, a lower amount of metallic nickel after subsequent reduction is achieved. All catalysts were partially reduced upon time on stream, leading to the formation of small Ni0 crystallites (ca. 3 nm) dispersed on a NiAl2O4 matrix. The most active and selective catalyst was the one with a Ni/Al ratio of 2, which was also very stable after a 500 h lifetime test at atmospheric pressure and 275°C.
    Research group: BioRefinery Technologies (Bio-Core)
    Thematic Areas: Chemical engineering Ingeniería química Enginyeria química
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 2044-4753
    Author identifier: 0000-0001-8624-306X; 0000-0002-6253-3465; n/a; 0000-0002-5273-8870
    Record's date: 2016-05-04
    Last page: 2317
    Journal volume: 6
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://pubs.rsc.org/en/content/articlelanding/2016/CY/C5CY01200G#!divAbstract
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1039/c5cy01200g
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2016
    First page: 2305
    Publication Type: Article Artículo Article
  • Keywords:

    Hidrogenació
    Hydrogenation of CO
    Synthetic natural gas
    hydrogenation
    Chemical engineering
    Ingeniería química
    Enginyeria química
    2044-4753
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