Adiabatic testing procedures for determining the self-heating propensity of coal and sample ageing effects

Beamish, BB, Barakat, MA and St George, JD (2000) Adiabatic testing procedures for determining the self-heating propensity of coal and sample ageing effects. Thermochimica Acta, 362 1-2: 79-87.


Author Beamish, BB
Barakat, MA
St George, JD
Title Adiabatic testing procedures for determining the self-heating propensity of coal and sample ageing effects
Journal name Thermochimica Acta   Check publisher's open access policy
Publication date 2000
Sub-type Article
DOI 10.1016/S0040-6031(00)00588-8
Volume number 362
Issue number 1-2
ISSN 0040-6031
Start page 79
End page 87
Total pages 9
Place of publication Amsterdam
Publisher Elsevier Science
Collection year 2000
Language eng
Subject C1
290701 Mining Engineering
650202 Coal
Abstract An adiabatic testing procedure for determining the self-heating propensity of coal has been evaluated using New Zealand coals. Repeatability of the self-heating rate (R-70), Obtained by the method, is less than +/-5% of the average value for tests performed consecutively over 3-4 days. For longer time periods, even using samples under controlled storage, the self-heating rate value decreases noticeably due to pre-oxidation effects. This pre-oxidation effect can be described by the equation R-70(t) = at(b), where t is the time in days, b a constant dependent on storage method and particle size and a the R-70 value of fresh coal. When stored samples are used for analysis, knowledge of this relationship can be used to extrapolate a fresh coal R-70 value by doing repeated tests over time. (C) 2000 Elsevier Science B.V. All rights reserved.
Keyword Chemistry, Analytical
Chemistry, Physical
Spontaneous Combustion
Adiabatic Oven
Self-heating Rate
Coal Storage
Ageing
New-zealand Coals
Oxidation
Q-Index Code C1

Document type: Journal Article
Sub-type: Article
Collection: School of Mechanical & Mining Engineering Publications
 
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