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Process intensification of alkynol semihydrogenation in a tube reactor coated with a Pd/ZnO catalyst
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Cherkasov, Nikolay, Bai, Yang and Rebrov, Evgeny V. (2017) Process intensification of alkynol semihydrogenation in a tube reactor coated with a Pd/ZnO catalyst. Catalysts, 7 (12). 358. doi:10.3390/catal7120358
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Official URL: http://dx.doi.org/10.3390/catal7120358
Abstract
Semihydrogenation of 2-methyl-3-butyn-2-ol (MBY) was studied in a 5 m tube reactor wall-coated with a 5 wt% Pd/ZnO catalyst. The system allowed for the excellent selectivity towards the intermediate alkene of 97.8 ± 0.2% at an ambient H2 pressure and a MBY conversion below 90%. The maximum alkene yield reached 94.6% under solvent-free conditions and 96.0% in a 30 vol % MBY aqueous solution. The reactor stability was studied for 80 h on stream with a deactivation rate of only 0.07% per hour. Such a low deactivation rate provides a continuous operation of one month with only a two-fold decrease in catalyst activity and a metal leaching below 1 parts per billion (ppb). The excellent turn-over numbers (TON) of above 105 illustrates a very efficient utilisation of the noble metal inside catalyst-coated tube reactors. When compared to batch operation at 70 °C, the reaction rate in flow reactor can be increased by eight times at a higher reaction temperature, keeping the same product decomposition of about 1% in both cases.
| Item Type: | Journal Article | |||||||||
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| Subjects: | T Technology > TP Chemical technology | |||||||||
| Divisions: | Faculty of Science > Engineering | |||||||||
| Library of Congress Subject Headings (LCSH): | Flow chemistry, Ethylene, Acetylene, Hydrogenation, Palladium | |||||||||
| Journal or Publication Title: | Catalysts | |||||||||
| Publisher: | MDPI | |||||||||
| ISSN: | 2073-4344 | |||||||||
| Official Date: | 25 November 2017 | |||||||||
| Dates: |
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| Date of first compliant deposit: | 29 November 2017 | |||||||||
| Volume: | 7 | |||||||||
| Number: | 12 | |||||||||
| Article Number: | 358 | |||||||||
| DOI: | 10.3390/catal7120358 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access | |||||||||
| RIOXX Funder/Project Grant: |
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