Coal Testing   

Coal analysis can be done efficiently and economically on the Labfit Pty Ltd CS-2000 carbon and sulfur analyzer.

Coal may be defined as a compact stratified mass of plant debris which has been modified chemically and physically by natural agencies, interspersed with small amounts of inorganic matter. Coal; W. Francis, 1954

Stored energy supplies like coal and oil contains varying amounts of sulphur  which can be grouped into three categories, namely:- inorganic, organic and sulphate sulphur. Large variances in the sulphur content are founding coal. This is due to the processes and environment in which the coal was formed.

When coal is burned, the free sulphur and pyretic sulphur , or pyrites, is converted amongst others, into ferric oxide, copper oxide, arsenic oxide or lead oxide, with the loss of oxides of sulphur . The organic sulphur burns to sulphur dioxide.

The behavior on combustion of the organic sulphur and the sulphate sulphur depends largely upon factors such as the rate and temperature of combustion, the degree of aeration of the sample mass and the proportion of calcium carbonate present in the coal. Under normal ashing temperatures, the sulphate sulphur remains largely in the ash.

High temperature oxygen enriched combustion ensures that the sulphate sulphur is liberated as sulphur dioxide.

The sulphur presents in a coal supply usually provides a distinct market sector for its use. Different burners and application of the heat generated, as well as different combustion gas cleanup techniques will all be influenced by the sulphur content amongst other combustion processes. Electrostatic precipitators, for instance, will only function as per design if the ash resistivity is within the design tolerances.

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