Abstract
In order to remove the sulphur, the bituminous coal with high sulphur content was treated with chlorine gas and hydrogen peroxide. The conventional coal preparation technique was insufficient to reduce the sulphur content of the coal used in this study.
On the treatment with chlorine gas, some amounts of coal particles were suspended in water, and then chlorine gas was introduced in this suspension for 0.5-6 hours. This treatment reduced considerably the total sulphur content in the coal. But, unfortunately, the coal treated with chlorine gas showed the unfavourable effect on the caking property. This difficulty was solved to some extent by adding some amounts of pitch, to the chlorine treated coal.
On the treatment with hydrogen peroxide, the aqueous solution of the 3% concentration was used. Some amounts of the coal particles were suspended in the aqueous solution of hydrogen peroxide. By this treatment, it was confirmed that the inorganic sulphur in the coal was perfectly removed and the caking property of the product was not changed by this treatment.
