Abstract
The pyrolysis of 7 coals of differing ranks was carried out in an inert atmosphere using a Curie-point pyrolyser. The yields of inorganic gases, hydrocarbon gases and light hydrocarbon liquids such as benzene toluene and xylene were determined in the pyrolysis temperature range between 700 and 1200 K. The results were compared with those obtained using other equipment such as a fluidized bed and a mesh heater. It was revealed that the temperature profile for a particular product was similar for all coals. In other words, the relative yield of a particular product between two pyrolysis temperatures was almost independent of the coal type. Therefore simply by knowing the yield of a certain product from a certain coal at a particular temperature, it becomes possible to predict the product yield at any other temperature.
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