Process Intensification of Alkynol Semihydrogenation in a Tube Reactor Coated with a Pd/ZnO Catalyst
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 yi...
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doaj-265b29ef8efb4565ade1da86ffae11802020-11-24T23:01:25ZengMDPI AGCatalysts2073-43442017-11-0171235810.3390/catal7120358catal7120358Process Intensification of Alkynol Semihydrogenation in a Tube Reactor Coated with a Pd/ZnO CatalystNikolay Cherkasov0Yang Bai1Evgeny Rebrov2School of Engineering, University of Warwick, Coventry CV4 7AL, UKStoli Catalysts Ltd., Coventry CV3 4DS, UKSchool of Engineering, University of Warwick, Coventry CV4 7AL, UKSemihydrogenation 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.https://www.mdpi.com/2073-4344/7/12/358palladiumhydrogenationselectivityacetyleneethyleneLindlarflow chemistryprocess intensification |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Nikolay Cherkasov Yang Bai Evgeny Rebrov |
spellingShingle |
Nikolay Cherkasov Yang Bai Evgeny Rebrov Process Intensification of Alkynol Semihydrogenation in a Tube Reactor Coated with a Pd/ZnO Catalyst Catalysts palladium hydrogenation selectivity acetylene ethylene Lindlar flow chemistry process intensification |
author_facet |
Nikolay Cherkasov Yang Bai Evgeny Rebrov |
author_sort |
Nikolay Cherkasov |
title |
Process Intensification of Alkynol Semihydrogenation in a Tube Reactor Coated with a Pd/ZnO Catalyst |
title_short |
Process Intensification of Alkynol Semihydrogenation in a Tube Reactor Coated with a Pd/ZnO Catalyst |
title_full |
Process Intensification of Alkynol Semihydrogenation in a Tube Reactor Coated with a Pd/ZnO Catalyst |
title_fullStr |
Process Intensification of Alkynol Semihydrogenation in a Tube Reactor Coated with a Pd/ZnO Catalyst |
title_full_unstemmed |
Process Intensification of Alkynol Semihydrogenation in a Tube Reactor Coated with a Pd/ZnO Catalyst |
title_sort |
process intensification of alkynol semihydrogenation in a tube reactor coated with a pd/zno catalyst |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2017-11-01 |
description |
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. |
topic |
palladium hydrogenation selectivity acetylene ethylene Lindlar flow chemistry process intensification |
url |
https://www.mdpi.com/2073-4344/7/12/358 |
work_keys_str_mv |
AT nikolaycherkasov processintensificationofalkynolsemihydrogenationinatubereactorcoatedwithapdznocatalyst AT yangbai processintensificationofalkynolsemihydrogenationinatubereactorcoatedwithapdznocatalyst AT evgenyrebrov processintensificationofalkynolsemihydrogenationinatubereactorcoatedwithapdznocatalyst |
_version_ |
1725639569068523520 |