Effect of potassium on the mechanisms of biomass pyrolysis studied using complementary analytical techniques

Le Brech, Yann and Ghislain, Thierry and Leclerc, Sébastien and Bouroukba, Mohammed and Delmotte, Luc and Brosse, Nicolas and Snape, Colin and Chaimbault, Patrick and Dufour, Anthony (2016) Effect of potassium on the mechanisms of biomass pyrolysis studied using complementary analytical techniques. ChemSusChem, 9 (8). pp. 863-872. ISSN 1864-564X

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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 1H 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.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Y. Le Brech, T. Ghislain, S. Leclerc, M. Bouroukba, L. Delmotte, N. Brosse, C. Snape, P. Chaimbault, A. Dufour, ChemSusChem 2016, 9, 863, which has been published in final form at http://dx.doi.org/10.1002/cssc.201501560. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: biomass; in situ analysis; nmr spectroscopy; potassium; reaction mechanisms
Schools/Departments: University of Nottingham, UK > Faculty of Engineering
Identification Number: 10.1002/cssc.201501560
Depositing User: Eprints, Support
Date Deposited: 07 Jun 2017 11:28
Last Modified: 15 Oct 2017 15:29
URI: http://eprints.nottingham.ac.uk/id/eprint/43447

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