Abstract
The main purpose of this project is to study the role of mineral matter in coal combustion using laser-spectroscopic techniques. However, it is necessary, as discussed in the proposal, to carry out conventional analysis of coal to obtain information about the nature of volatile matter and of the mineral matter. We analyzed the volatile matter generated by heating coal in vacuum using a quadrupole mass spectrometer. We then carried out an analysis of ash generated by oxidizing coal in air at 400--500{degree}C in a muffle furnace. The analysis was carried out using an atomic absorption spectrophotometer. In order to obtain a precise analysis of the flame constituents, the spectra of the laser induced combustion of coal (coal flame) were recorded. With a view to characterize the mineral constituents present in the flame, a laboratory furnace was fabricated to burn coal at low pressures and obtain optogalvanic spectra of various species as a function of position in the flame. Results are discussed. 5 refs., 5 figs., 5 tabs.
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