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SUMMARY:Uncovering the changes on Raney Ni properties under Biomass upgrad
 ing reactions
DTSTART:20170824T130000
DTEND:20170824T140000
DTSTAMP:20260406T102153Z
UID:d0b37c866891f1b3c1f702565cc5da97368f484826973843b47ffdda
CATEGORIES:Conferences - Seminars
DESCRIPTION:Jorge A. Mendes-Burak Max-Planck-Institut für Kohlenforschung
 \, Germany\nTo better understand a catalyst largely used in industrial pro
 cesses\, here employed in new and renewable applications. Detailed structu
 ral and surface analyses of Raney Ni used in the wood catalytic upstream a
 nd dehydrogenation of limonene process was performed. Several techniques a
 s (1) X-ray diffraction (XRD)\, (2) X-ray photoelectron spectroscopy (XPS)
 \, (3) transmission electronic microscopy (TEM)\, (4) energy-dispersive X-
 ray spectroscopy (EDX)\, and (5) superconducting quantum interference devi
 ce (SQUID) were used in order to gain in-depth insight into the remarkable
  material properties which confer Raney Ni exceptional durability in the p
 rocesses. The bulk properties of Raney Ni\, were more affected by the dehy
 drogenation process\, presenting significant changes\, such as fragmentati
 on of the particles\, leaching\, and loss of the magnetic properties. The 
 catalyst surface was highly affected by both processes\, leading to a decr
 ease in the surface area\, the formation of a thin film of organic materia
 l on the catalyst surface\, and the modification of the chemical compositi
 on. Notably\, Raney Ni could be regenerated by a simple reactivation treat
 ment (i.e.\, cooking the catalyst in 2-propanol at 180-200°C) or the stab
 ility was improved by the mixing of the solvents. The chemical and physica
 l changes of the surface show distinguishing features that are associated 
 with the changes in selectivity observed in the processes. More recently s
 torage studies of this catalyst in a different solvent have shown the effe
 cts of time and different solvents functional groups on the Raney Ni propr
 ieties.\n 
LOCATION:Zeuzier
STATUS:CONFIRMED
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