Novel ni/ce(ti)zro2catalysts for methane dry reforming prepared in supercritical alcohol media

Yuliya Bespalko, Ekaterina Smal, Mikhail Simonov, Konstantin Valeev, Valeria Fedorova, Tamara Krieger, Svetlana Cherepanova, Arcady Ishchenko, Vladimir Rogov, Vladislav Sadykov

Research output: Contribution to journalArticlepeer-review

Abstract

To achieve a high activity and coking stability of nickel catalysts in dry reforming of methane, materials comprised of ceria-zirconia doped by Ti were investigated as supports. Ceria-zirconia supports doped with titanium were prepared either via the Pechini method or by synthesis in supercritical alcohol media. Ni-containing catalysts were prepared by two techniques: standard incipient wetness impregnation and one-pot synthesis. The catalytic reaction of DRM to synthesis gas was carried out in the 600-750 °C range over 5% wt. Ni/Ce(Ti)ZrO2. Dried and calcined supports and catalysts were characterized by physicochemical methods including N2 adsorption, XRD, Raman, H2-TPR, and HRTEM. Both preparation methods led to formation of solid solution with cubic fluorite-like structure, as well as after addition of Ti. Introduction of Ti should provide improved oxygen storage capacity and mobility of support oxygen. The highest activity was observed with the catalyst of 5% wt. Ni/Ce0.75Ti0.2Zr0.05O2-δ composition due to optimized oxide support structure and support oxygen mobility.

Original languageEnglish
Article number3365
Number of pages24
JournalEnergies
Volume13
Issue number13
DOIs
Publication statusPublished - 1 Jul 2020

Keywords

  • Biogas
  • Ceria-zirconia
  • Dry reforming of methane
  • Supercritical synthesis
  • SYNTHESIS GAS
  • supercritical synthesis
  • biogas
  • SOLID-SOLUTIONS
  • CO2
  • CARBON FORMATION
  • X-RAY-DIFFRACTION
  • NI-BASED CATALYSTS
  • dry reforming of methane
  • ceria-zirconia
  • CERIA
  • CONTINUOUS HYDROTHERMAL SYNTHESIS
  • DOPED CEO2
  • OXYGEN STORAGE CAPACITY

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