dc.rights.license | CC-BY-NC-ND | |
dc.contributor.advisor | Lamme, W.S. | |
dc.contributor.advisor | Jong, K.P. de | |
dc.contributor.author | Ommeren, E.G. van | |
dc.date.accessioned | 2018-10-07T17:01:09Z | |
dc.date.available | 2018-10-07T17:01:09Z | |
dc.date.issued | 2017 | |
dc.identifier.uri | https://studenttheses.uu.nl/handle/20.500.12932/37477 | |
dc.description.abstract | Palladium on carbon catalysts (Pd/C) are of great importance as a hydrogenation
catalyst in chemical industry. In 2013, a quarter of drugs involved at least one hydrogenation
step during their synthesis. Nevertheless, hydrogenation over Pd/C
catalysts is not fully understood. Cinnamaldehyde hydrogenation is used as a model
hydrogenation reaction, as cinnamaldehyde has two different sites that can be hydrogenated.
Earlier research shows that the selectivity towards hydrogenation of the
C C or C O bond is controlled by the palladium particle size. In this research, the
influence of the pores in the carbon support on the palladium particles and the catalytic
performance in the hydrogenation of cinnamaldehyde was explored. To this
end, a method was developed using thermoporometry experiments to selectively
impregnate pores of different sizes with a palladium tetraamine solution, which
functions as a precursor to the palladium particles. These impregnations were performed
by dry impregnation as overall impregnation method, partial impregnation
to impregnate the smaller pores and micropore and small mesopore blocking with
subsequent partial impregnation to selectively impregnate larger mesopores.
The final catalysts showed different selectivity according to intended impregnation
location: palladium particles intended in small pores showed a higher selectivity towards
hydrocinnamaldehyde formation and palladium particles in intended larger
pores showed a slightly higher selectivity towards cinnamyl alcohol formation. | |
dc.description.sponsorship | Utrecht University | |
dc.format.extent | 32300926 | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.title | Study into the influence of support pore size on the structure and activity of Pd/C catalysts | |
dc.type.content | Master Thesis | |
dc.rights.accessrights | Open Access | |
dc.subject.keywords | catalysis, Pd/C, Palladium, Carbon, activated carbon, hydrogenation | |
dc.subject.courseuu | Nanomaterials: Chemistry and Physics | |