Yuan, HanHanYuanRestuccia, FrancescoFrancescoRestucciaRichter, FranzFranzRichterRein, GGRein2018-11-292019-01-152018-11-292019-01-15Fuel, 2019, 236, pp.1100-11090016-2361http://hdl.handle.net/10044/1/64683Self-heating of fuel layers can trigger ignition when the temperature of the surroundings is sufficiently high. Self-heating ignition has been a hazard and safety concern in raw materials production, transportation, and storage facilities for centuries. Hot plate and oven-basket experiments are the two most used lab-scale experiments to assess the hazard of self-heating ignition. While extensive experiments have been done to study this phenomenon, modelling of the experiments is substantially lagging behind. A computational model that can accurately simulate self-heating ignition under the two experimental configurations has not been developed yet. In this study, we build such a model by coupling heat transfer, mass transfer, and chemistry using the open-source code Gpyro. Due to the accessibility of large amount of experimental data, coal is chosen as the material for model validation. A literature review of the kinetic parameters for coal samples from different origins reveals that there is a compensation effect between the activation energy and exponential factor. Combining the compensation effect with our model, we simulate 6 different experimental studies covering the two experimental configurations, a wide range of sample sizes (heights ranging from 5 mm to 126 mm), and various coal origins (6 countries). The model accurately predicts critical ignition temperature (Tig) for all 24 experiments with an error below 7 °C. This computational model unifies for the first time the two most used self-heating ignition experiments and provides theoretical insights to understand self-ignition for different fuels under different conditions.© 2018 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/)Science & TechnologyTechnologyEnergy & FuelsEngineering, ChemicalEngineeringSelf-heatingIgnitionCoalHot plateOven-basketLOW-TEMPERATURE OXIDATIONSMOLDERING COMBUSTIONKINETIC-PARAMETERSTHERMAL IGNITIONDUST LAYERSHOT SURFACEPYROLYSISBEHAVIORBIOMASSLIGNITE0904 Chemical Engineering0913 Mechanical Engineering0306 Physical Chemistry (Incl. Structural)EnergyJournal Articlehttps://www.dx.doi.org/10.1016/j.fuel.2018.09.065682587EP/M506345/1EP/L504786/1