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Effect of the number of TGA curves employed on the biomass pyrolysis kinetics results obtained using the Distributed Activation Energy Model

Soria-Verdugo, Antonio and Goos, Elke and Garcia-Hernando, Nestor (2015) Effect of the number of TGA curves employed on the biomass pyrolysis kinetics results obtained using the Distributed Activation Energy Model. Fuel Processing Technology, 134, pp. 360-371. Elsevier. DOI: 10.1016/j.fuproc.2015.02.018 ISSN 0378-3820

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Abstract

Highlights • The pyrolysis of pine, olive kernel, thistle and corncob is studied using DAEM. • The uncertainties of activation energy Ea and pre-exponential factor k0 are evaluated. • A higher number of TGA curves reduces the uncertainty of the kinetic data (Ea, k0). • Considering uncertainties of input data improves accuracy of the kinetic data (Ea, k0). • The effect of the precision of the TGA analyser on the kinetic data is studied. The Distributed Activation Energy Model (DAEM) is widely used for determination of characteristic parameters of pyrolysis kinetics from a certain number of experimental thermal gravimetric analysis (TGA) curves obtained at different heating rates. The number of heating rates employed to obtain different TGA curves varies between different authors, being typically between 3 and 5. The validity of DAEM has been discussed by several authors based on its capability of describing the devolatilization kinetics of the samples. Nevertheless, to our knowledge, there are no studies available in the literature evaluating the uncertainties associated to the simplified DAEM method or quantifying the effect of considering different numbers of TGA curves in the analysis. Therefore, we studied the effect of the number of TGA curves considered in this work, as well as the effect of considering or neglecting the uncertainties of different measurement parameters employed in the calculation. The characterization was carried out using four types of biomass (pine wood, olive kernel, thistle flower and corncob) employing up to 9 different heating rates between 10 and 40 K/min during the TGA tests. Activation energies and pre-exponential factors were given and their uncertainties were reduced by increasing the number of TGA curves obtained at different heating rates. Nonetheless, considering measurement uncertainties during the calculations reduces significantly the final uncertainties of the pyrolysis parameters, permitting the reduction of the number of TGA curves used in the analysis.

Item URL in elib:https://elib.dlr.de/96801/
Document Type:Article
Title:Effect of the number of TGA curves employed on the biomass pyrolysis kinetics results obtained using the Distributed Activation Energy Model
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Soria-Verdugo, AntonioCarlos III University of Madrid, Energy Systems Engineering Group, Thermal and Fluids Engineering Department, Madrid, SpainUNSPECIFIED
Goos, ElkeUNSPECIFIEDUNSPECIFIED
Garcia-Hernando, NestorCarlos III University of Madrid, Energy Systems Engineering Group, Thermal and Fluids Engineering Department, Madrid, SpainUNSPECIFIED
Date:2015
Journal or Publication Title:Fuel Processing Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:134
DOI :10.1016/j.fuproc.2015.02.018
Page Range:pp. 360-371
Publisher:Elsevier
ISSN:0378-3820
Status:Published
Keywords:Distributed Activation Energy Model (DAEM); Biomass pyrolysis; Heating rate uncertainty; Temperature uncertainty; Thermal gravimetric analysis (TGA)
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Power Plants (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Brennstoffe (old)
Location: Köln-Porz , Stuttgart
Institutes and Institutions:Institute of Combustion Technology > Chemical Kinetics
Deposited By: Geigle, Dr. Klaus Peter
Deposited On:07 Jul 2015 08:49
Last Modified:31 Jul 2019 19:53

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