Publication
Title
Heterogeneous Pt-catalyzed transfer dehydrogenation of long-chain alkanes with ethylene
Author
Abstract
The dehydrogenation of long-chain alkanes to olefins and alkylaromatics is a challenging endothermic reaction, typically requiring harsh conditions which can lead to low selectivity and coking. More favorable thermodynamics can be achieved by using a hydrogen acceptor, such as ethylene. In this work, the potential of heterogeneous platinum catalysts for the transfer dehydrogenation of long-chain alkanes is investigated, using ethylene as a convenient hydrogen acceptor. Pt/C and Pt-Sn/C catalysts were prepared via a simple polyol method and characterized with CO pulse chemisorption, HAADF-STEM, and EDX measurements. Conversion of ethylene was monitored via gas-phase FTIR, and distribution of liquid products was analyzed via GC-FID, GC-MS, and 1H-NMR. Compared to unpromoted Pt/C, Sn-promoted catalysts show lower initial reaction rates, but better resistance to catalyst deactivation, while increasing selectivity towards alkylaromatics. Both reaction products and ethylene were found to inhibit the reaction significantly. At 250 degrees C for 22 h, TON up to 28 and 86 mol per mol Pt were obtained for Pt/C and PtSn2/C, respectively, with olefin selectivities of 94% and 53%. The remaining products were mainly unbranched alkylaromatics. These findings show the potential of simple heterogeneous catalysts in alkane transfer dehydrogenation, for the preparation of valuable olefins and alkylaromatics, or as an essential step in various tandem reactions. The catalytic transfer dehydrogenation of long-chain alkanes was investigated with simple heterogeneous Pt catalysts under mild conditions and with high selectivity, using ethylene as a cheap and abundant hydrogen acceptor.
Language
English
Source (journal)
Catalysis science & technology. - -
Publication
2023
ISSN
2044-4753
2044-4761
DOI
10.1039/D3CY00370A
Volume/pages
13 :24 (2023) , p. 7123-7135
ISI
001104905100001
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
3D Structure of nanomaterials under realistic conditions (REALNANO).
Paired electrocatalytic alkane dehydrogenation and CO2 reduction in a multicompartment electroreactor using metal-organic framework based proton conducting membranes.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 27.11.2023
Last edited 10.01.2024
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