TRACKING PYRITIC SULFUR DURING THE MICROWAVE- CHEMICAL DESULFURIZATION OF COAL USING MOSSBAUER SPECTROSCOPY

Weng Sihao，

Wang Jie

Nuclear Science and Techniques

pp.122-125

Published in print 01 May 1992

23100

The transformations of pyrite in coal during the microwave- chemical treatment for desulfurization of coal was studied with Mössbauer spectroscopy of ⁵⁷Fe. The results for phase analyses show that the selective dielectric heating by microwave energy can give rise to the thermal decomposition of pyrite FeS2 in coal to new phases, pyrrhotite Fe_1-xS (0<x≤0.125) and troilite FeS which can be dissolved in dilute HCI solution. Therefore the microwave irradiation combined with the acid washing treatment will be an effective method of desulfurization of coal.

CoalDesulfurizationMicrowave irradiationAcid-washingMössbauer spectroscopy

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