Fiche publication
Date publication
avril 2016
Journal
ChemSusChem
Auteurs
Membres identifiés du Cancéropôle Est :
Mr LECLERC Sébastien
Tous les auteurs :
Le Brech Y, Ghislain T, Leclerc S, Bouroukba M, Delmotte L, Brosse N, Snape C, Chaimbault P, Dufour A
Lien Pubmed
Résumé
Complementary analytical methods have been used to study the effect of potassium on the pyrolysis mechanisms of cellulose and lignocellulosic biomasses. Thermogravimetry, calorimetry, high-temperature (1) H NMR spectroscopy (in situ and real-time analysis of the fluid phase formed during pyrolysis), and water extraction of quenched char followed by size-exclusion chromatography coupled with mass spectrometry have been combined. Potassium impregnated in cellulose suppresses the formation of anhydrosugars, reduces the formation of mobile protons, and gives rise to a mainly exothermic signal. The evolution of mobile protons formed from K-impregnated cellulose has a very similar pattern to the evolution of the mass loss rate. This methodology has been also applied to analyze miscanthus, demineralized miscanthus, miscanthus re-impregnated with potassium after demineralization, raw oak, and Douglas fir. Hydrogen mobility and transfer are of high importance in the mechanisms of biomass pyrolysis.
Mots clés
biomass, in situ analysis, nmr spectroscopy, potassium, reaction mechanisms
Référence
ChemSusChem. 2016 04 21;9(8):863-72
