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 language | English (US) |
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Pages (from-to) | 371-378 |
Number of pages | 8 |
Journal | Chemical Engineering Science |
Volume | 197 |
DOIs | |
State | Published - Apr 6 2019 |
Bibliographical note
Publisher Copyright:© 2018 Elsevier Ltd
Keywords
- Anisole
- Hydrodeoxygenation
- Molybdenum carbide
- Oxygen treatment