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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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https://hal.univ-lorraine.fr/hal-01416493
Contributor : Lemta Ul <>
Submitted on : Wednesday, December 14, 2016 - 3:16:14 PM
Last modification on : Thursday, July 9, 2020 - 12:06:04 AM

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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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