Mohalik, Niroj Kumar and Mandal, Somu and Ray, Santosh Kumar and Khan, Asfar Mobin and Mishra, Debashish and Pandey, Jai Krishna (2021) TGA/DSC study to characterise and classify coal seams conforming tosusceptibility towards spontaneous combustion. International Journal of Mining Science and Technology, 32. pp. 75-88. ISSN 2095-2686

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Thermogravimetric analysis/differential scanning calorimeter (TGA/DSC) technique along with basic coalcharacteristics study is carried out for eighty coal samples of Indian coalfields, to determine spontaneouscombustion propensity behaviour of coal. TGA study of coal samples indicates that there is an increase inthe mass of coal samples in the temperature range 150–350 ℃, which may be due to oxygen adsorptionand absorption. The correlation and principal component analysis states that the component of proxi-mate analysis (Mad,VMd, FR, and VR) have an acceptable correlation with the TGA experiments resultsi.e., Tgshand Tgign. Multiple fixed nonlinear regression analysis shows that thermogravimetry (TG) exper-iment results Tgignmay be the best index to categorise/classify the coal as per their susceptibility towardsspontaneous combustion. The authors proposed four groups of classification as per their propensitytowards spontaneous combustion depending upon the moisture (Mad), volatile matter (VMd), and TG ignition temperature from differential thermogravimetric (DTG) curve (Tgign) using hierarchal clustering analysis. The coal samples of different seams from Indian coalfield may be classified into four different clusters, viz. very highly/extremely susceptible (Tgign< 260 ℃), highly susceptible (260 ℃  Tgign< 290℃), moderately susceptible (290 ℃  Tgign 320 ℃), and poorly susceptible (Tgign> 320 ℃). The field observations and TGA/DSC experiment results with the following statistical analysis substantiate a similar assessment.

Item Type: Article
Uncontrolled Keywords: CoalTGA/DSCSpontaneous combustionTG ignition
Subjects: Mine Ventilation
Depositing User: Mr. B. R. Panduranga
Date Deposited: 09 Nov 2022 05:05
Last Modified: 09 Nov 2022 05:05

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