TISCO Makes Sulfuric Acid from Coke-oven Gas      

After one year of operation, Taiyuan Iron and Steel Group Co., Ltd.'s (TISCO) project of making sulfuric acid by desulfurization of coke-oven gas has proved to  be capable of reducing 12 238 tons of sulfur dioxide emissions and producing 18 800 tons of concentrated sulfuric acid (98%) as well as 43 860 tons of steam (5.2 MPa) every year.
   The project was put into operation in April 2008. Its working principle is to separate hydrogen sulfide from coke-oven gas first, and then convert it into concentrated sulfuric acid (98%) to serve as raw materials for producing ammonium sulfate. By adopting a world class process, the project can treat 130 000 cubic meters of coke-oven gas per hour, thus not only reducing air pollution, but also preventing the influence of harmful impurities in coke-oven gas, like hydrogen sulfide and hydrogen cyanide, on the quality of the stainless steel.