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Characterization and reactivity of soot from fast pyrolysis of lignocellulosic compounds and monolignols
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics. (Thermochemical Energy Conversion Laboratory)
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 212, p. 1489-1500Article in journal (Refereed) Published
Abstract [en]

This study presents the effect of lignocellulosic compounds and monolignols on the yield, nanostructure and reactivity of soot generated at 1250 °C in a drop tube furnace. The structure of soot was characterized by electron microscopy techniques, Raman spectroscopy and electron spin resonance spectroscopy. The CO2 reactivity of soot was investigated by thermogravimetric analysis. Soot from cellulose was more reactive than soot produced from extractives, lignin and monolignols. Soot reactivity was correlated with the separation distances between adjacent graphene layers, as measured using transmission electron microscopy. Particle size, free radical concentration, differences in a degree of curvature and multi-core structures influenced the soot reactivity less than the interlayer separation distances. Soot yield was correlated with the lignin content of the feedstock. The selection of the extraction solvent had a strong influence on the soot reactivity. The Soxhlet extraction of softwood and wheat straw lignin soot using methanol decreased the soot reactivity, whereas acetone extraction had only a modest effect.

Place, publisher, year, edition, pages
Oxford: Elsevier, 2018. Vol. 212, p. 1489-1500
Keywords [en]
Fast pyrolysis, Lignocellulosic compounds and monolignols, Soot, Reactivity, Nanostructure
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:umu:diva-142747DOI: 10.1016/j.apenergy.2017.12.068ISI: 000425200700110OAI: oai:DiVA.org:umu-142747DiVA, id: diva2:1164236
Available from: 2017-12-11 Created: 2017-12-11 Last updated: 2018-06-09Bibliographically approved

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Trubetskaya, AnnaBroström, Markus

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