期刊
CHEMICAL ENGINEERING SCIENCE
卷 197, 期 -, 页码 371-378出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2018.12.027
关键词
Molybdenum carbide; Oxygen treatment; Hydrodeoxygenation; Anisole
资金
- National Science Foundation Catalysis and Biocatalysis Program (CBET Award) [1510661]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1510661] Funding Source: National Science Foundation
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:Mo-bulk = 0.002 for Fresh-Mo2C to O:Mo-bulk = 0.276 for Mo2C oxygen treated at 423 K) formulations. Benzene selectivity decreased from 97% at O:Mo-bulk = 0.002 to 18% at O:Mo-bulk = 0.276 while phenol selectivity concurrently increased from 0.2% at O:Mo-bulk = 0.002 to 81% at O:Mo-bulk = 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. (C) 2018 Elsevier Ltd. All rights reserved.
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