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


Instruments: B18-Core EXAFS

Documents:
10.1007_s11244-018-0887-4.pdf