Dehydroisomerisation of α-Pinene and Limonene to p-Cymene over Silica-Supported ZnO in the Gas Phase

Alsharif, Aliyah ORCID: 0000-0001-9481-3077, Smith, Natalie, Kozhevnikova, Elena F ORCID: 0000-0001-8242-7945 and Kozhevnikov, Ivan V ORCID: 0000-0003-2453-5256 (2021) Dehydroisomerisation of α-Pinene and Limonene to p-Cymene over Silica-Supported ZnO in the Gas Phase. CATALYSTS, 11 (10). p. 1245.

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Official URL: http://dx.doi.org/10.3390/catal11101245

Abstract

<jats:p>Silica-supported zinc oxide possessing acid and dehydrogenation functions is an efficient, noble-metal-free bifunctional catalyst for the environment-friendly synthesis of p-Cymene from renewable monoterpene feedstock by gas-phase dehydroisomerisation of α-pinene and limonene in a fixed-bed reactor. The reaction involves acid-catalysed terpene isomerisation to p-menthadienes followed by dehydrogenation to form p-Cymene. Dehydroisomerisation of α-pinene produces p-Cymene with 90% yield at 100% conversion at 370 °C and WHSV = 0.01–0.020 h−1. The reaction with limonene gives a 100% p-Cymene yield at 325 °C and WHSV = 0.080 h−1. ZnO/SiO2 catalyst shows stable performance for over 70 h without co-feeding hydrogen.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	alpha-pinene, limonene, p-Cymene, zinc oxide, bifunctional catalysis
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	03 Dec 2021 17:02
Last Modified:	15 Mar 2024 01:03
DOI:	10.3390/catal11101245
Open Access URL:	https://www.mdpi.com/2073-4344/11/10/1245
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3144541