Characteristic Study of Some Different Kinds of Coal Particles Combustion with Online TG-MS-FTIR

Four kinds of pulverized coal samples from China and Indonesia were studied by thermogravimetry coupled with mass spectrometry and fourier transform infrared spectroscopy (TG-MS-FTIR). The thermal behaviors and gaseous emissions of these coals were analyzed in this work. The results indicate that the relative lower values of H/C ratios, which normally represent the degree of aromatization and ring condensation in coal samples, could lead to the relative more intense thermal reaction. The time-evolved profiles of some typical gas products (i.e., CO, SO₂, CH₄, NO, NO₂, NH₃ and etc.) were provided by TG-MS-FTIR, and their variations are different. For all the samples, the releases of SO₂ and COS can be found at lower temperature than those of NO and CO. As the temperature increases, the possible conversion of NO₂ and NH₃ to NO is deduced in this work. (paper)