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Tesi etd-03082019-145939


Thesis type
Tesi di dottorato di ricerca
Author
FULIGNATI, SARA
URN
etd-03082019-145939
Title
Platform-chemicals synthesis through selective hydrogenation of chemical intermediates from renewable resources
Settore scientifico disciplinare
CHIM/04
Corso di studi
SCIENZE CHIMICHE E DEI MATERIALI
Commissione
tutor Prof.ssa Raspolli Galletti, Anna Maria
tutor Prof.ssa Antonetti, Claudia
Parole chiave
  • Green Chemistry
  • renewable resources
  • 5-hydroxymethylfurfural (HMF)
  • heterogeneous catalysis
  • aqueous medium
  • microwave system
  • hydrogenation
  • BHMF
  • BHMTHF
  • batch reactor
  • flow reactor
Data inizio appello
20/03/2019;
Consultabilità
parziale
Data di rilascio
20/03/2022
Riassunto analitico
The necessity of replacing fossil resources with renewable ones makes the catalytic conversion of these last a real challenge for the industrial chemistry. In this perspective, 5-hydroxymethylfurfural (HMF) is a key molecule because it could be obtained from renewable resources, such as the lignocellulosic biomass, and, due to its functionality, it could be a precursor of important monomers, biofuels and chemicals. Under this perspective, the present project has two main goals: i) the optimization of HMF synthesis from monosaccharides, polysaccharides and raw biomasses, and ii) the optimization of HMF conversion to valuable products under the most sustainable reaction conditions. Regarding the synthesis of HMF, it was carried out starting from fructose, inulin and Jerusalem artichoke in the presence of both heterogeneous and homogeneous catalysts. Once optimized the synthesis of HMF, its conversion to valuable products involved the hydrogenation reaction to two important monomers, such as 2,5-bis(hydroxymethyl)furan (BHMF) and 2,5-bis(hydroxymethyl)tetrahydrofuran (BHMTHF). Also in this case, the reaction was carried out in the respect of Green Chemistry principles. Their synthesis was optimized both in batch and flow reactors, in the first case starting from both pure HMF and crude hydrolyzate through a cascade process.
In conclusion, this work contributed to the development of the exploitation of renewable resources for the production of alternative platform-chemicals and monomers.
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