Oxygen content as a variable to control product selectivity in hydrodeoxygenation reactions on molybdenum carbide catalysts

Anurag Kumar, Aditya Bhan

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Oxygen-treatment of as-synthesized molybdenum carbide at 296 K–423 K and subsequent temperature-programmed-surface-reaction with hydrogen was utilized to obtain oxygen-modified Mo2C (O:Mobulk = 0.002 for Fresh-Mo2C to O:Mobulk = 0.276 for Mo2C oxygen treated at 423 K) formulations. Benzene selectivity decreased from 97% at O:Mobulk = 0.002 to 18% at O:Mobulk = 0.276 while phenol selectivity concurrently increased from 0.2% at O:Mobulk = 0.002 to 81% at O:Mobulk = 0.276 in reactions of anisole/hydrogen mixtures at atmospheric pressure and 423 K showing that O* content can be used to tune the product selectivity in hydrodeoxygenation reactions on transition metal carbides. This change in selectivity can plausibly be ascribed to the formation of MoOx/MoOxCy species that disrupts ensembles required for selective aromatic C–O bond cleavage.

Original languageEnglish (US)
Pages (from-to)371-378
Number of pages8
JournalChemical Engineering Science
Volume197
DOIs
StatePublished - Apr 6 2019

Bibliographical note

Funding Information:
This research was supported by National Science Foundation Catalysis and Biocatalysis Program ( CBET Award No. 1510661 ). Prof. Rakesh Agrawal’s extensive research in the area of sustainable energy development has provided us the motivation and encouragement to pursue fundamental catalysis research in the utilization of biomass as an alternate carbon and energy source.

Funding Information:
This research was supported by National Science Foundation Catalysis and Biocatalysis Program (CBET Award No. 1510661). Prof. Rakesh Agrawal's extensive research in the area of sustainable energy development has provided us the motivation and encouragement to pursue fundamental catalysis research in the utilization of biomass as an alternate carbon and energy source.

Keywords

  • Anisole
  • Hydrodeoxygenation
  • Molybdenum carbide
  • Oxygen treatment

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