Effect of weathering on physico-chemical properties and combustion behavior of an Indian thermal coal
Subhajit Aich
Barun Kumar Nandi
Sumantra Bhattacharya
摘要：An open air stockpile of conical shape was formed with 3.5 m base diameter and 5 m height using 500 tons of -200 mm size ROM thermal coal on a concrete floor.Coal sample from the stockpile were collected at 30 days interval for analysis of various chemical properties like;proximate analysis,ultimate analysis,gross calorific value (GCV) and various combustion related properties such as ignition temperature,peak temperature,burnout temperature,maximum combustion rate,ignition index,burnout index,combustion performance index and combustion rate intensity index.Experimental results show that,due to weathering of coal fixed carbon decreased from 35.6％ to 19.9％,elemental carbon (C) decreased from 46.6％ to 28.6％,hydrogen (H) decreased from 3.3％ to 2.9％ and GCV decreased by up to 55％ of original value during 330 days of storage of coal in an open atmosphere.Ash content of coal increased form 29.2％ to 46.6％ due to loss of combustibles.Sulfur (S) of coal was found to get increased from 0.33％ to 1.08％ during storage.The activation energy of coal combustion increased from 22 kJ/mol to 54 kJ/mol.Variation in combustion parameters signifies that weathering has significant negative impact on coal combustion properties as coal become difficult to ignite.
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资助基金：5241-291-6628 dated 16 February 2016.Any opinions,findings and conclusions expressed in this paper are those of the authors and do not necessarily reflect the views National(No)
论文发表日期：2019-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：12( 51-62 )
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