The analysis of gas evolving during the pyrolysis of two very different rank coals was studied by using FT-IR spectroscopy.These\r\ncoals, coming from Sulcis (Sardinia, Italy) and from South Africa, respectively, were subjected to progressive heating up to 800�°C in\r\nvacuum.The thermal destruction of coal was followed by monitoring the production of gases in this range of temperature.The gases\r\nevolving in the heating fromroom temperature to 800�°C were collected at intervals of 100�°C and analysed by infrared spectroscopy.\r\nThe relative pressures Pr(i) = P(i)/P max(i)T) were plotted against temperature. These graphs clearly show the correlation among\r\nqualitative gas composition, temperature, and the maximum value of emissions, thus confirming FT-IR analysis as a powerful key\r\nfor pyrolysis monitoring.
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