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Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-02042019-144957


Tipo di tesi
Tesi di dottorato di ricerca
Autore
MATTONAI, MARCO
URN
etd-02042019-144957
Titolo
Advanced analytical pyrolysis in the field of biomass
Settore scientifico disciplinare
CHIM/01
Corso di studi
SCIENZE CHIMICHE E DEI MATERIALI
Relatori
tutor Prof.ssa Ribechini, Erika
commissario Prof. Castelvetro, Valter
commissario Prof. Pescitelli, Gennaro
commissario Prof. Chiellini, Federica
commissario Prof. Fabbri, Daniele
commissario Prof.ssa Pérez-Arantegui, Josefina
Parole chiave
  • biomass
  • biomasse
  • carbohydrates
  • carboidrati
  • chromatography
  • cromatografia
  • gc/ms
  • legno
  • mass spectrometry
  • pirolisi
  • pyrolysis
  • spettrometria di massa
  • tannini
  • tannins
  • wood
Data inizio appello
14/02/2019
Consultabilità
Non consultabile
Data di rilascio
14/02/2089
Riassunto
The present PhD thesis deals with the development of procedures based on analytical pyrolysis for the characterisation of lignocellulosic biomass and its main component. Recently developed instrumental setups are applied for the first time to obtain new information on the complex phenomenon of biomass pyrolysis, with the aim of improving the current knowledge on the matter. The results provide new points of view on the pyrolysis mechanism of carbohydrates and polyphenols, and how these mechanisms can be affected by natural agents (UV light) and pre-treatment processes (ball-milling).
The thesis presents five chapters:
Chapter 1. State of the art - general introduction on biomass composition and usefulness, and techniques for its characterisation.
Chapter 2. Reactive pyrolysis of carbohydrates - influence of high pressure and prolonged pyrolysis time on the thermal degradation of glucans and fructans.
Chapter 3. Reactive pyrolysis of tannins - development of a screening procedure to assess the presence of tannins in lignocellulose using analytical pyrolysis-GC/MS with in situ silylation.
Chapter 4. Analytical pyrolysis of wood with on-line UV irradiation - evaluation of the effects of UV irradiation on the pyrolytic behaviour of fir and chestnut wood.
Chapter 5. Monitoring ball-milling of cellulose - effect of ball-milling on crystallinity index, degree of polymerisation, thermal stability and pyrolytic behaviour of cellulose.
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