New W-doped nickel aluminate catalysts in the glycerol hydrodeoxygenation (HDO)

Sinisgalli, Irene (2021) New W-doped nickel aluminate catalysts in the glycerol hydrodeoxygenation (HDO). [Laurea magistrale], Università di Bologna, Corso di Studio in Chimica industriale [LM-DM270], Documento ad accesso riservato.
Documenti full-text disponibili:
[img] Documento PDF (Thesis)
Full-text non accessibile fino al 10 Ottobre 2024.
Disponibile con Licenza: Salvo eventuali più ampie autorizzazioni dell'autore, la tesi può essere liberamente consultata e può essere effettuato il salvataggio e la stampa di una copia per fini strettamente personali di studio, di ricerca e di insegnamento, con espresso divieto di qualunque utilizzo direttamente o indirettamente commerciale. Ogni altro diritto sul materiale è riservato

Download (1MB) | Contatta l'autore


Biorefineries are emerging as an important pillar for achieving both sustainable energy and chemicals. Bio-derived feedstocks are extremely various, but one of the most relevant building block chemicals coming from them is glycerol. Glycerol is an interesting molecule to be valorised because of its high functionalization degree and the huge surplus obtained from biodiesel production. Among all the possible valorisation routes, the catalytic Aqueous-Phase Hydrodeoxygenation (APHDO) allows to combine two processes (APR and HDO) and to overcome the issues related to normal glycerol HDO, conducted with external and high-pressure H2, by producing H2 in-situ via APR on part of the reactant itself. This thesis work is focused on the development of a new catalytic system for the APHDO based on Ni, known to be active on APR, and doped with W, which increases the acidity of the system and makes it active towards HDO. Effects of dopant loading, synthesis method and space velocity were evaluated. To evaluate the effect of doping, four catalysts with different W loadings were synthetised via sol-gel method, characterised through a wide range of analytical techniques (XRD, XRF, H2-TPR, NH3-TPD, N2 physisorption and H2 chemisorption), and their catalytic activity was tested in a continuous tubular reactor, at 235 °C and 45 bar. Afterwards, the catalyst that showed the best performance among them was prepared through impregnation method and was characterised and tested as before. Finally, the Weight Hourly Space Velcoity (WHSV) effect was studied by conducting the process under the same conditions and with a doubled glycerol feeding flow. W-doping resulted to be effective in HDO activation, giving low values of carbon conversion to gas, and the catalytic performance resulted to be influenced by the preparation method. Low WHSV values resulted to be better for a good interaction between the substrate of the reaction and the catalyst.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Sinisgalli, Irene
Relatore della tesi
Correlatore della tesi
Corso di studio
Ordinamento Cds
Parole chiave
glycerol aqueous-phase hydrodeoxygenation in-situ hydrogen nickel aluminate spinel high value-added liquid products
Data di discussione della Tesi
20 Ottobre 2021

Altri metadati

Gestione del documento: Visualizza il documento