Carbon support effects on metal (Pd, Pt and Ru) catalyzed hydrothermal decarboxylation/deoxygenation of triglycerides

LJ Konwar, JP Mikkola

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
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Abstract

Herein, we show that textural properties of carbon supports have limited influence on the activity and stability of carbon supported Pd, Pt and Ru catalysts upon decarboxylation of a model triglyceride (tristearin) in the presence of subcritical water (256–326 °C). In contrast, surface acid-base properties of carbon supports were found to have a marked impact on the performance and stability of these catalysts. More precisely, for Pt group (Pt and Pd) a positive correlation could be observed between the concentration of surface basic sites and catalyst deoxygenation activity and durability while acid sites had the opposite effect. On the other hand, the activity of Ru-based catalysts were not analogously affected by the acid-base properties of carbon supports, even so a positive correlation was found between surface basicity and durability (reusability). Further, the activity of metals in decreasing order of TOF was Ru>Pt>Pd, irrespective of carbon support.

Original languageEnglish
Article number118611
Number of pages16
JournalApplied Catalysis A: General
Volume638
DOIs
Publication statusPublished - 25 May 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Catalyst deactivation
  • Green diesel
  • Hydrothermal deoxygenation/decarboxylation
  • Ru-based catalysts
  • Supported carbon catalysts

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