Determination of the risk of self-ignition of coals and biomass materials

Torrent, Javier García; Ramírez-Gómez, Álvaro; Querol-Aragón, E.; Grima-Olmedo, Carlos; Pejić, Ljiljana Medić

doi:10.1016/j.jhazmat.2012.01.086

Cited by 58 publications

(20 citation statements)

References 14 publications

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“…Particularly dangerous are endogenous fires in coal mines (Jaskółowski andKasperkiewicz 2012, Singh 2013), as well as spontaneous fires in coal storage yards (Fierro et al 1999;Gierasimczuk 2009), which are a common phenomenon caused by the accumulation of heat resulting from exothermic oxidation of coal (Quintero et al 2009). The problem of self-heating and self-ignition of coal has been the subject of many scientific papers (Arisoy and Akgiin 1994;Bhat and Agarwal 1996;Liu et al 1998;Fierro et al 1999;García-Torrent et al 2012;Yauan and Smith 2012). The tendency of self-ignition of coal depends on its type, the ability to adsorb oxygen through coal, the fraction of finely divided coal, and the proportion of volatile parts, moisture, pyrite and egzynite.…”

Section: Spontaneus Combustion Phenomenonmentioning

confidence: 99%

The Use of Thermovision in the Monitoring of Coal Storage Facilities as an Element of Safety Management in the Warehouse Management

Sobocińska

Sobociński

2019

System Safety: Human - Technical Facility - Environment

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Spontaneuos combustion (or self-ignition) is the initiation of the burning process without an external source of ignition, such as a flame or spark. This phenomenon often occurs during storage of such substances as hay, straw as well as coal or culm. Like any other type of fire, in addition to potential material losses, it also poses a threat to people. Thanks to the systematic monitoring of landfills using a thermal imaging camera, the dangerous effects of this phenomenon can be avoided. The article presents photos taken on a coal storage site where, as a result of both prolonged heat and wind exposition, a self-ignition phenomenon occurred that was detected early due to the use of thermovision.

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Section: Spontaneus Combustion Phenomenonmentioning

confidence: 99%

The Use of Thermovision in the Monitoring of Coal Storage Facilities as an Element of Safety Management in the Warehouse Management

Sobocińska

Sobociński

2019

System Safety: Human - Technical Facility - Environment

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“…Self-heating ignition is defined as the tendency a porous solid fuel has to undergo spontaneous exothermic reactions in oxidative atmospheres at low temperatures [5,6]. Knowledge of the tendency of materials to self-ignite is essential to power plants that handle, store, or process biomass resources [7]. Critical conditions for self-heating in stored bulk materials could be determined with laboratory-scale methods such as adiabatic calorimetry , hot plate experiments and isothermal oven tests [5,[8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Experimental measurement of particle size effects on the self-heating ignition of biomass piles: Homogeneous samples of dust and pellets

Fernandez-Añez

Restuccia

2019

Fuel

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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.

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“…In addition, in the case of specific products such as biomass for fuel production, security issues related to spontaneous heating of stored product (Larsson et al, 2012) and the consequent risk of fire and explosion should be carefully taken into consideration (García-Torrent et al 2012;. Ramírez et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Flow Properties and Pattern Flow Prediction of Food Industrial Powders

2017

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More and more industries are faced with new products that need to be stored in silos which, in general, require knowledge of their physical properties and, above all, flow. Food industries are among those using powders as raw materials likely to develop functional problems. Thus, the aim of the present study was to investigate the flow properties of six food powders using equipment called Powder Flow Tester, and the results were compared with those recommended by the Eurocode 1 Part 4 international standard. Wide range of variation in the flow properties responses was observed, suggesting that their expression through a single average value may not be suitable for vertical silos. It was concluded that only the bulk density of products is in accordance with the standard. In relation to flow, only flaked corn is able to flow without possibility of obstruction in the discharge with higher discharge outlet dimensions, being also recommended for flaked oat.

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Determination of the risk of self-ignition of coals and biomass materials

Cited by 58 publications

References 14 publications

The Use of Thermovision in the Monitoring of Coal Storage Facilities as an Element of Safety Management in the Warehouse Management

The Use of Thermovision in the Monitoring of Coal Storage Facilities as an Element of Safety Management in the Warehouse Management

Experimental measurement of particle size effects on the self-heating ignition of biomass piles: Homogeneous samples of dust and pellets

Flow Properties and Pattern Flow Prediction of Food Industrial Powders

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