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

Le Brech, Yann; Ghislain, Thierry; Leclerc, Sébastien; Bouroukba, Mohammed; Delmotte, Luc; Brosse, Nicolas; Snape, Colin; Chaimbault, Patrick; Dufour, Anthony

Authors

Yann Le Brech

Thierry Ghislain

Sébastien Leclerc

Mohammed Bouroukba

Luc Delmotte

Nicolas Brosse

COLIN SNAPE COLIN.SNAPE@NOTTINGHAM.AC.UK
Professor of Chemical Technology & Chemical Eng

Patrick Chaimbault

Anthony Dufour



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.

Citation

Le Brech, Y., Ghislain, T., Leclerc, S., Bouroukba, M., Delmotte, L., Brosse, N., …Dufour, A. (2016). Effect of Potassium on the Mechanisms of Biomass Pyrolysis Studied using Complementary Analytical Techniques. ChemSusChem, 9(8), 863-872. https://doi.org/10.1002/cssc.201501560

Journal Article Type Article
Acceptance Date Nov 30, 2015
Online Publication Date Mar 15, 2016
Publication Date Apr 21, 2016
Deposit Date Jun 7, 2017
Publicly Available Date Jun 7, 2017
Journal ChemSusChem
Print ISSN 1864-5631
Electronic ISSN 1864-564X
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 9
Issue 8
Pages 863-872
DOI https://doi.org/10.1002/cssc.201501560
Keywords biomass; in situ analysis; nmr spectroscopy; potassium; reaction mechanisms
Public URL http://eprints.nottingham.ac.uk/id/eprint/43447
Publisher URL http://onlinelibrary.wiley.com/doi/10.1002/cssc.201501560/full
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf
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.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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