Title:
Thermogravimetric Analysis and Devolatilisation Kinetics of New Biomass Fuels
Author(s):
Moradi, F., Brunner, T., Obernberger, I.
Document(s):
Paper
Abstract:
Due to increasing prices for wood fuels the utilisation of new biomass fuels has become a topic of strong interest for biomass combustion systems. In this study, thermal degradation of several types of biomass such as conventional wood biomass (spruce), short rotation coppice (willow and poplar) as well as herbaceous and agricultural biomass (Arundo donax, miscanthus, wheat straw, olive stones and maize husks) were investigated by means of thermogravimetric analysis. Analysis of the devolatilisation characteristics were quantified in order to compare new fuels with conventional wood biomass. The thermal degradation of short rotation coppice, herbaceous and agricultural biomass fuels occurred at lower temperatures than that obtained for conventional wood fuels. Furthermore, the thermal decomposition of the samples investigateded was successfully modeled by three first-order independent parallel reactions corresponding to the degradation of three pseudocomponents linked to hemicellulose, cellulose and lignin. Through the model simulation, the diversity in mass fractions and kinetic parameters of three pseudo components was analysed. Except for maize husks where hemicellulose represents the largest fraction, for all other samples tested cellulose showed the highest mass fraction followed by hemicellulose and lignin. For all samples the highest activation energy was found for cellulose and the lowest one for lignin decomposition.
Keywords:
biomass, cellulose, hemicellulose, lignin, pyrolysis
Topic:
Thermochemical conversion - Pyrolysis for power, CHP, polygeneration and chemicals
Subtopic:
Pyrolysis for power, CHP, polygeneration and chemicals
Event:
18th European Biomass Conference and Exhibition
Session:
VP2.3.12
Pages:
986 - 992
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-VP2.3.12
Price:
FREE
