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Effect of particle size and support type on Pd catalysts for 1,3-butadiene hydrogenation
DOI:
10.1007/s11244-018-0887-4
Authors:
Donato
Decarolis
(University College London; Research Complex at Harwell)
,
Ines
Lezcano-Gonzalez
(University College London; Research Complex at Harwell)
,
Diego
Gianolio
(Diamond Light Source)
,
Andrew
Beale
(University College London; Research Complex at Harwell)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Topics In Catalysis
, VOL 50
State:
Published (Approved)
Published:
January 2018
Diamond Proposal Number(s):
12775

Abstract: Pd nanoparticles supported on SiO2, Si3N4 and Al2O3 were studied to examine the effect of particle size and support type on the hydrogenation of 1,3-butadiene. Pd nanoparticles were produced using a reverse micelle method resulting in particles with a remarkably small particle size distribution (σ < < 1 nm). The support type and particle size were observed to affect both catalytic activity and product selectivity. All catalysts showed a decrease of their activity with time on stream, paired with an increase in selectivity to butenes (1-butene and cis/trans-2-butene) from a product stream initially dominated by n-butane. In situ XAFS demonstrated a correlation between the formation of palladium hydride and n-butane production in the early stages (~ 1 h) of reaction. The extent of palladium hydride formation, as well as its depletion with time on stream, was dependent on both particle size and support type. Metallic Pd was identified as the species selective towards the production of butenes.
Journal Keywords: Palladium; Butadiene; Particle size; Hydrogenation
Subject Areas:
Chemistry,
Materials
Instruments:
B18-Core EXAFS
Added On:
23/01/2018 10:46
Documents:
10.1007_s11244-018-0887-4.pdf
Discipline Tags:
Physical Chemistry
Catalysis
Chemistry
Materials Science
Nanoscience/Nanotechnology
Technical Tags:
Spectroscopy
X-ray Absorption Spectroscopy (XAS)
Extended X-ray Absorption Fine Structure (EXAFS)