Study on the IR spectra of inhibitor effect of insulation material for preventing spontaneous combustion of coal

An effective method for preventing spontaneous combustion of coal is to cover oxygen insulation material on coal stockpiles.an organic oxygen insulation material which had been prepared was covered over the surface of coal stockpiles.Putting in atmosphere over some days,the coal covered under the material was analyzed by IR spectra and was compared with the uncovered coal and fresh coal.The results have shown the amount of oxidized functional groups of coal increased with the oxidation reaction.Also,the peak area of oxidized functional groups of coal covered with oxygen insulation material was further less than the one of uncovered coal,but was almost same as the one of fresh coal.So it was concluded that the obvious oxidation reaction happened during the uncovered coal and the coal covered with the material hardly have any oxidation reaction.Therefore,the oxygen insulation material can insulate oxygen and prevent spontaneous combustion of coal.