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Effect of Potassium on the Mechanisms of Biomass Pyrolysis Studied using Complementary Analytical Techniques
Author(s) -
Le Brech Yann,
Ghislain Thierry,
Leclerc Sébastien,
Bouroukba Mohammed,
Delmotte Luc,
Brosse Nicolas,
Snape Colin,
Chaimbault Patrick,
Dufour Anthony
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501560
Subject(s) - miscanthus , pyrolysis , cellulose , chemistry , char , demineralization , thermogravimetry , potassium , extraction (chemistry) , biomass (ecology) , chemical engineering , mass spectrometry , chromatography , bioenergy , organic chemistry , inorganic chemistry , materials science , biofuel , waste management , oceanography , enamel paint , engineering , composite material , geology
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.