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

被引：30

作者：

Kumar, Anurag ^{[1
]}

Bhan, Aditya ^{[1
]}

机构：

[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

来源：

CHEMICAL ENGINEERING SCIENCE | 2019年 / 197卷

基金：

美国国家科学基金会;

关键词：

Molybdenum carbide; Oxygen treatment; Hydrodeoxygenation; Anisole; VAPOR-PHASE HYDRODEOXYGENATION; TRANSITION-METAL CARBIDES; TUNGSTEN CARBIDES; SURFACE-CHEMISTRY; DEOXYGENATION; ADSORPTION; ISOMERIZATION; NITRIDES; INSIGHTS; BENZENE;

D O I：

10.1016/j.ces.2018.12.027

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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.

引用

页码：371 / 378

页数：8

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