The occurrence form of sulfur in coal and the law of the generation of sulfur dioxide during heating

In order to explore the quantitative relationship between formation of sulfur dioxide from sulfur in coal and heating temperature, a study is made of the state of occurrence of sulfur in each component of coal, thermogravimetric curve of coal and infrared spectrum of sulfur dioxide, by means of X-ray photo electron spectroscopic meter(XPS) thermogravimetric analyzer-Fourier transform infrared spectrometer(TGA-FTIR) and intelligent Coulometric sulfur analyzer( CSA), together with the testing on emission of sulfur dioxide from coal at different heating temperatures. Result of study shows that there exists a quantitative relationship between emission of sulfur dioxide and temperature and it is related to occurrence form of sulfur in coal; the temperature required for the emission of SO₂ varies depending on the forms of sulfur: organic sulfur(<400 ℃), pyrite sulfur(400~900 ℃)and sulphate sulfur(>900 ℃). The research-derived result is of great significance for sulfur removal and rapid checking of forms of sulfur in coal.