Premium
Comparison of the inhibition mechanisms of five types of inhibitors on spontaneous coal combustion
Author(s) -
Tsai YunTing,
Yang Yi,
Wang Caiping,
Shu ChiMin,
Deng Jun
Publication year - 2017
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.3915
Subject(s) - anthracite , chemistry , coal , combustion , thermogravimetry , inorganic chemistry , spontaneous combustion , coke , phosphate , nuclear chemistry , chemical engineering , organic chemistry , engineering
Summary Five inhibitors—Zn/Mg/Al‐CO 3 layered double hydroxides (LDHs), thermosensitive hydrogel (P(NIPA‐co‐SA)), diammonium phosphate ((NH 4 ) 2 HPO 4 ), sodium phosphate (Na 3 PO 4 ), and magnesium chloride (MgCl 2 )—commonly used to forestall the spontaneous combustion of anthracite and coke coal were investigated in this study, and the inhibition effects were quantified. According to the results of thermogravimetry, differential scanning calorimetry, Fourier transform infrared spectroscopy, and kinetic analysis, Zn/Mg/Al‐CO 3 ‐LDHs, P(NIPA‐co‐SA), and (NH 4 ) 2 HPO 4 all exert substantial inhibiting effects on anthracite and coke coal. Specifically, P(NIPA‐co‐SA) was altered during the liquid‐to‐gel phase, which isolated the oxygen from the coal surface and produced an endothermic reaction that decreased the environmental temperature; this reaction further inhibited spontaneous combustion. Conversely, MgCl 2 promoted a combustion reaction and reduced the apparent activation energy of coal, increasing the risk of spontaneous combustion. This study provides a reference for selecting suitable inhibitors to prevent the spontaneous combustion of coal.