Abstract
The environmental safety of using coals and their combustion efficiency depends on the total sulfur content. The author analysed the sulfur content of the coals of the Irsha-Borodinsky, Altai, Irkutsk and Kuznetsk deposits. Gravimetric analysis was used as analytical methods. The results of the study showed that the coals taken from the boiler houses contain from 2.7% to 3.9% of total sulfur and belong to the sulphurous group. These coals are noticeably inferior to the high-quality coals of the world market in terms of their sulfur content. This means that the fuel does not meet the high requirements for environmental friendliness when burning and can harm the ecosystem.
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