Abstract
Abstract Thermal analysis-mass spectrometry (TA-MS) has been used to study the reactions of Al Maghara coal and its low temperature ash (LTA) under combustion-related conditions. The TA-MS profile of the coal gives information on combustion performance (ignition, peak combustion and burnout temperatures) and on chemical changes to the volatile matter (H 2 O, SO 2 , CO 2 and NO 2 ), char and minerals. X-ray diffraction identified pyrite as the major mineral component in the coal. The major and only feature of the TA-MS profile of the LTA is SO 2 evolution associated with decomposition of pyrite and iron sulphates. The high sulphur content of Al Maghara coal is a severe obstacle to its use in combustion. Cleaning of the coal to reduce the sulphur to an acceptable level is considered to be essential.
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