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Flexible NiCo Based Catalyst for Direct Hydrodeoxygenation of Guaiacol to Cyclohexanol

Abstract

The catalytic hydrodeoxygenation (HDO) of lignin-derived phenols is an important step for bio-oil upgrading. Herein, a novel HDO system was established with the presence of nitrogen, instead of traditional hydrogen. A series of CNT supported Ni-based catalysts were prepared and introduced in the HDO of guaiacol and other lignin-derived phenolic compounds. The bimetallic NiCo/CNT catalysts exhibited better catalytic performance during the HDO reaction, in comparison with monometallic Ni/CNT and Co/CNT catalysts. Among those catalysts, (15+5)% NiCo/CNT catalyst afforded the highest guaiacol conversion (up to 100%)with cyclohexanol as the main product in isopropanol. The effects of process parameters on the guaiacol conversion and products distribution were studied in detail, finding that the presence of nitrogen could help to suppress the generation of byproducts, while the presence of hydrogen would facilitate the occurrence of side reactions. The HDO reaction of guaiacol occurred possibly in two consecutive steps: the demethoxylation of guaiacol to phenol and the further hydrogenation of aromatic ring to cyclohexanol.

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Supplementary files

Article information


Submitted
10 Jun 2020
Accepted
08 Oct 2020
First published
10 Oct 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Flexible NiCo Based Catalyst for Direct Hydrodeoxygenation of Guaiacol to Cyclohexanol

C. Chen, M. Zhou, P. Liu, B. K. Sharma and J. Jiang, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ02929G

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