Determination method for applying demineralized coal to measure forms of sulfur in coal by temperature programming method

[0017] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0018] like figure 1 Shown, the present invention uses deashed coal to carry out temperature programming method to measure the assay method of form sulfur in coal, comprises the steps:

[0019] 1. Deash the coal. like figure 2 As indicated, weigh a coal sample with a particle size of less than 100 mesh, add 1 liter of 5 mol / L hydrochloric acid, heat in a constant temperature water bath at 55-60°C for 1 hour, and continue stirring. Then transfer the coal sample to a plastic beaker, add 1 liter of hydrofluoric acid, heat, dissolve, and filter in the same way as above. Then transfer the coal sample to a beaker, add 1 liter of hydrochloric acid, repeat the above-mentioned heating operation in a constant temperature water bath, filter the acid-treated coal sample, wash with distilled water, until the filtrate is detected to be free of chloride io...