- Title
- Natural zeolite supported Ni catalysts for hydrodeoxygenation of anisole
- Creator
- Yan, Penghui; Kennedy, Eric; Stockenhuber, Michael
- Relation
- ARC
- Relation
- Green Chemistry Vol. 23, Issue 13, p. 4673-4684
- Publisher Link
- http://dx.doi.org/10.1039/d0gc04377j
- Publisher
- Royal Society of Chemistry
- Resource Type
- journal article
- Date
- 2021
- Description
- Natural and synthetic (BEA, MOR) zeolite-supported nickel (∼5 wt%) catalysts were prepared and employed for the hydrogenation of toluene and hydrodeoxygenation of anisole in a continuous-flow reactor. Ni/BEA and Ni/MOR display a higher level of metal dispersion and stronger metal–support interaction compared to the Ni/NZ and Ni/Escott catalysts, resulting in a higher concentration of charge-compensating Ni species and a larger high-temperature reduction peak. The Ni/BEA and Ni/MOR also present a significant mass of low-temperature desorbed H2 (centred at 150 °C) based on H2-TPD, suggesting the H species are weakly adsorbed on small Ni clusters. In contrast, the H species were strongly adsorbed by the bulk Ni crystal over Ni/Escott and Ni/NZ, which were desorbed at maxima between 211 and 222 °C. We propose that the strongly adsorbed H species play a crucial role in the hydrogenation of toluene, leading to a significantly higher yield of methylcyclohexane over Ni/Escott and Ni/NZ compared to Ni/BEA and Ni/MOR. Both metal and acid sites are required in the hydrodeoxygenation of anisole. The strong Brønsted acid sites and numerous smaller Ni species over Ni/BEA facilitated the transalkylation of anisole to phenol and methylanisole and subsequently hydrogenolysis of phenol to benzene, followed by the hydrogenation of benzene to cyclohexane.
- Subject
- benzene; desorption; hydrogenation; phenols; toluene; zeolites
- Identifier
- http://hdl.handle.net/1959.13/1450126
- Identifier
- uon:43843
- Identifier
- ISSN:1463-9262
- Language
- eng
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