Particularities of low-temperature WGSR over ceramometal and oxide catalysts: Effect of catalyst particle size

S. F. Tikhov, T. P. Minyukova, S. I. Reshetnikov, K. R. Valeev, N. V. Vernikovskaya, A. N. Salanov, S. V. Cherepanova, V. A. Sadykov

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1 Citation (Scopus)

Abstract

Two types of the low temperature WGS catalysts were compared: oxide Cu-Zn-Al catalyst prepared through coprecipitation procedure and ceramometal CuAlO/CuA catalyst prepared from powdered CuAl alloy. The catalysts were characterized by XRD, SEM with EDX, adsorption-desorption isotherms. Activity was measured at a pressure of 1 bar in the mixture of CO:Н2О:Н2 = 8:42:50 at a steam/gas ratio of 0.6–0.7. The catalysts were used as a small (0.14–0.25 mm)and large (3.2 × 3.2 × 5 mm)fraction. It was found that oxide catalyst possesses of a developed mesopore structure with specific surface area 122 m2/g while ceramometal catalyst has a developed macropore structure with size up to ten microns and specific surface area 15.7 m2/g. As a result, large fraction (granules)of ceramometal catalyst has twofold higher effectiveness factor due to higher internal diffusion.

Original languageEnglish
Pages (from-to)405-411
Number of pages7
JournalChemical Engineering Journal
Volume374
DOIs
Publication statusPublished - 15 Oct 2019
Externally publishedYes

Keywords

  • Effectiveness factor
  • Oxide and ceramometal catalysts
  • WGS reaction
  • METHANOL SYNTHESIS
  • OXIDATION
  • DESIGN
  • GAS SHIFT REACTION
  • STRUCTURE-SENSITIVITY

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