Abstract
The necessity for application of high-sulfur coal for the production of heat and electric energy is shown in this work. There is a short analysis of the technologies that are aimed at the reduction of sulfur dioxide (SO2) emissions during the burning of high-sulfur coal and sulfur coal. The desulfurization method, which is based on the selective oxidation of pyrite sulfur at 673−723 K, is suggested. The main products of the process are coal with a relatively low sulfur content (1.0−1.9 mass %), resin obtained by coal partial pyrolysis, and desulfurization gases (SO2 concentration of 2.2−4.2 vol %). Gases that are formed with the aforementioned SO2 concentration can be used for the production of liquefied concentrated SO2, sulfur, or sulfuric acid. The proposed process can be the first stage of the two-stage burning of coal at heat electric stations. The abovementioned products can be obtained and desulfurized coal can be directed to the second stage of burning at high temperature.
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