Experimental measurement of particle size effects on the self-heating ignition of biomass piles: Homogeneous samples of dust and pellets
File(s)
Accepted version
Author(s)
Restuccia, Francesco
Fernandez-Anez, Nieves
Rein, Guillermo
Type
Journal Article
Abstract
Biomass can become an important fuel source for future power generation worldwide. However biomass piles are prone to self-heating and can lead to fire. When storing and transporting biomass, it is usually in the form of pellets which vary in diameter but are on average in the order of 7 mm. However, pellets tend to break up into smaller particles and into dust down to the µm size. For self-heating, size of particles is known to matter but the topic is poorly studied for biomass piles. This work presents an experimental study on the self-heating ignition behaviour of different particle sizes of wheat biomass. We study for the first time homogeneous samples from the dust scale to pellet diameter size, ranging from diameters of 300 µm to 6.5 mm. Experiments are done in an isothermal oven to find minimum ignition temperatures as a function of sample volume. The results are analysed using Frank-Kamenetskii theory. For the homogeneous biomass samples studied, we show that particle diameter variation does not bring a large change in self-heating ignition behaviour. The present work can be used to help quantify size effects on biomass ignition and help address the safety problems of biomass fires.
Date Issued
2019-11-01
Date Acceptance
2019-07-17
Citation
Fuel, 2019, 256
ISSN
0016-2361
Publisher
Elsevier
Journal / Book Title
Fuel
Volume
256
Copyright Statement
© 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering and Physical Sciences Research Council
Grant Number
EP/L504786/1
Subjects
Science & Technology
Technology
Energy & Fuels
Engineering, Chemical
Engineering
Self-heating ignition
Biomass
Particle size effects
Frank-Kamenetskii theory
LAYERS
0904 Chemical Engineering
0913 Mechanical Engineering
0306 Physical Chemistry (incl. Structural)
Energy
Publication Status
Published
Article Number
ARTN 115838
Date Publish Online
2019-08-01