Particle Size Effect in Liquid-Phase Hydrogenation of Phenylacetylene over Pd Catalysts: Experimental Data and Theoretical Analysis
Science article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Chemical Engineering Journal
ISSN: 1385-8947
, E-ISSN: 1873-3212
|
| Output data |
Year: 2019,
Volume: 358,
Pages: 520-530
Pages count
: 11
DOI:
10.1016/j.cej.2018.10.016
|
| Tags |
Structure sensitivity; Hydrogenation of phenylacetylene; Palladium; Kinetic modelling |
| Authors |
Markov Pavel V.
1
,
Mashkovsky Igor S.
1
,
Bragina Galina O.
1
,
Wärnå Johan
2
,
Gerasimov Evgenii Yu.
3
,
Bukhtiyarov Valerii I.
3
,
Stakheev Alexandr Yu.
1
,
Murzin Dmitry Yu.
2
|
| Affiliations |
| 1 |
N.D. Zelinsky Institute of Organic Chemistry RAS, Moscow, Russia
|
| 2 |
Process Chemistry Centre, Åbo Akademi University, Turku, Finland
|
| 3 |
Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
|
|
Funding (1)
|
1
|
Russian Science Foundation
|
16-13-10530
|
The liquid-phase hydrogenation of phenylacetylene (PA) over 1 wt% Pd/Al2O3 catalysts with the mean palladium cluster size varying from 1.5 to 22 nm was studied at 5 bar H2 pressure and 25 °C. Turnover frequency in hydrogenation of the triple and double bonds displayed a significant increase with an increase of the cluster size, which was more pronounced for the former case.
The effect of Pd nanoparticle size on the hydrogenation kinetics was analyzed and discussed using an approach based on a continuous distribution of edges and terraces exhibiting different reactivity.
A quantitative description of the concentration dependences with incorporation of Pd particle size in the rate equations demonstrated an excellent correspondence between theory and experiments.