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Development of a screening test based on isothermal calorimetry for determination of self-heating potential of biomass pellets
RISE - Research Institutes of Sweden, Safety and Transport, Safety.
RISE - Research Institutes of Sweden, Safety and Transport, Safety.ORCID iD: 0000-0001-6758-6067
RISE - Research Institutes of Sweden, Safety and Transport, Safety.
RISE - Research Institutes of Sweden, Safety and Transport, Safety.
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2017 (English)In: Fire and Materials, ISSN 0308-0501, E-ISSN 1099-1018Article in journal (Refereed) In press
Abstract [en]

For the risk for spontaneous combustion in storage of biomass pellets to be assessed, it is important to know how prone the fuel is to self-heating. There are traditional methods that are used to determine self-heating characteristics of fuels, eg, basket heating tests. The results from basket heating tests indirectly give the reactivity from a series of tests at high temperatures. This paper presents a sensitive screening test procedure for biomass pellets using isothermal calorimetry for direct measurement of the heat production rate at typical bulk storage temperatures. This method can be used to directly compare the reactivity of different batches of biomass pellets. The results could be used, eg, by storage security managers to gain better knowledge of their fuels propensity for self-heating and thereby for safer storage. A large number of tests have been performed to develop the test procedure presented. Different parameters, such as temperature, type of the test sample (powder/crushed or pellets), mass of test sample, and preheating time, have been varied. Furthermore, gas concentrations in the sample ampoule have been measured before and after some tests to study the oxygen consumption and the formation of CO and CO2. Three different types of pellets with different characteristics were tested to assess the variation in behaviour. Based on these tests, a screening test procedure is presented with a test temperature of 60°C, a sample size of 4 g, a 15-minute preheating period at the test temperature, and 24-hour test duration.

Place, publisher, year, edition, pages
2017.
Keyword [en]
Isothermal calorimetry, Pellets, Reactivity, Screening test, Self-heating, Wood pellets, Biomass, Calorimeters, Calorimetry, Carbon dioxide, Fuel storage, Fuels, Heating, Isotherms, Network security, Ore pellets, Pelletizing, Preheating, Reactivity (nuclear), Risk assessment, Screening, Spontaneous combustion, Technology transfer, Direct measurement, Gas concentration, Oxygen consumption, Screening tests, Test temperatures, Wood pellet, Testing
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-31124DOI: 10.1002/fam.2427Scopus ID: 2-s2.0-85019933108OAI: oai:DiVA.org:ri-31124DiVA, id: diva2:1136494
Available from: 2017-08-28 Created: 2017-08-28 Last updated: 2018-03-08Bibliographically approved

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