Effect of Potassium on the Mechanisms of Biomass Pyrolysis Studied using Complementary Analytical Techniques

Abstract : 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.
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ChemSusChem, ChemPubSoc Europe/Wiley, 2016, 9 (8), pp.863 - 872. 〈10.1002/cssc.201501560〉
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Soumis le : mercredi 14 décembre 2016 - 15:16:14
Dernière modification le : jeudi 24 mai 2018 - 10:56:05

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Yann Le brech, Thierry Ghislain, Sébastien Leclerc, Mohammed Bouroukba, Luc Delmotte, et al.. Effect of Potassium on the Mechanisms of Biomass Pyrolysis Studied using Complementary Analytical Techniques. ChemSusChem, ChemPubSoc Europe/Wiley, 2016, 9 (8), pp.863 - 872. 〈10.1002/cssc.201501560〉. 〈hal-01416493〉

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