Novel bimetallic 1%M-Fe/Al2O3-Cr2O3 (2:1) (M = Ru, Au, Pt, Pd) catalysts for Fischer-Tropsch synthesis

Paweł Mierczyński, Bartosz Dawid, Agnieszka Mierczynska-Vasilev, Waldemar Maniukiewicz, Izabela Witońska, Krasimir Vasilev, Malgorzata I. Szynkowska-Jóźwik

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Abstract

The main objective of this work was to study the physicochemical and catalytic properties of bimetallic supported catalysts [1%M-Fe/Al2O3-Cr2O3 (2:1) (M = Ru, Au, Pt, Pd)] in Fischer-Tropsch synthesis. Furthermore, the study investigated the effect of noble metal addition to iron-supported catalysts on their physicochemical properties and reactivity. The physicochemical properties of the catalysts were studied using a range of characterization techniques such as X-ray diffraction (XRD), temperature-programmed reduction (TPR-H2), temperature-programmed desorption of ammonia (TPD-NH3) and BET (Brunauer – Emmett - Teller method). The activity tests were performed by Fischer-Tropsch synthesis in a high-pressure fixed-bed reactor using a gas mixture of H2 and CO with a molar ratio of 1:1. The correlation between the physicochemical properties of the investigated catalysts and their catalytic performance in CO hydrogenation was also investigated. The reactivity results showed that the most active system exhibited a high specific surface area, the highest total acidity and was the most reducible catalyst compared to the other catalysts tested. In addition, the Au–Fe system showed high selectivity towards liquid product formation during CO hydrogenation.

Original languageEnglish
Article number106559
Number of pages9
JournalCatalysis Communications
Volume172
Early online date7 Nov 2022
DOIs
Publication statusPublished - Dec 2022

Keywords

  • Bimetallic catalysts
  • Binary oxide
  • Diesel production
  • Hydrogenation of CO
  • Iron catalyst
  • Syngas

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