Hydrodeoxygenation of 2,5-dimethyltetrahydrofuran over bifunctional metal-acid catalyst Pt–Cs2.5H0.5PW12O40 in the gas phase: Kinetics and mechanism

Althikrallah, Hanan ORCID: 0000-0002-5098-3696, Kozhevnikova, Elena F and Kozhevnikov, Ivan V ORCID: 0000-0003-2453-5256 (2021) Hydrodeoxygenation of 2,5-dimethyltetrahydrofuran over bifunctional metal-acid catalyst Pt–Cs2.5H0.5PW12O40 in the gas phase: Kinetics and mechanism. Molecular Catalysis, 510. p. 111711.

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Abstract

Hydrodeoxygenation (HDO) of 2,5-dimethyltetrahydrofuran (DMTHF) was studied at a gas-solid interface in a fixed-bed microreactor in the presence of bifunctional metal-acid catalysts comprising Pt/C and acidic heteropoly salt Cs2.5H0.5PW12O40 (CsPW). The Pt–CsPW catalyst deoxygenated DMTHF to n-hexane with >99% selectivity under mild conditions (90–100 °C, ambient pressure) and was much more efficient than monofunctional Pt/C. On the basis of kinetic studies, a mechanism for the HDO of DMTHF over Pt–CsPW was proposed, which includes a sequence of hydrogenolysis, dehydration and hydrogenation steps catalysed by Pt and proton sites of the bifunctional catalyst. The turnover rate of HDO increased with increasing Pt particle size suggesting that the hydrogenolysis of C–O bond in furanic compounds on Pt is a structure-sensitive reaction.

Item Type:	Article
Uncontrolled Keywords:	Hydrodeoxygenation, 2,5-dimethyltetrahydrofuran, Platinum, Heteropoly acid, Kinetics, Mechanism
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	19 Jul 2021 07:43
Last Modified:	18 Jan 2023 21:35
DOI:	10.1016/j.mcat.2021.111711
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3130489