Semi-industrial technology tests of the sanitary cleaning of metallurgical enterprises waste gases from sulfur and nitrogen oxides
Dosmukhamedov N.K. Kaplan V.A.
2022Ore and Metals Publishing house
Non-ferrous Metals
2022#2022Issue 23 - 7 pp.
Nitrogen emissions in the form of NOx with flue gases from thermal power plants are the most serious pollutants gener-ated during the combustion of coal. The calcium carbonate gas scrubbing process used today is expensive, generates a lot of waste, and leaves a significant amount of SO2 in the gas. Virtually no NO x removal. In this paper, we consider the behavior of nitrogen oxides during the purification of exhaust gases from thermal power plants with a carbonate melt of alkali metals. Based on the thermodynamic analysis of reactions between NO x and alkali metal carbonates, the possibility of reducing their concentrations in the exhaust gases is shown. It has been established that the process of NOx absorption in the temperature range of 573…823K is accompanied by the formation of stable potassium nitrite (KNO2) in the melt, as evidenced by the high negative values of the Gibbs energies of the reactions. The results of balance experiments fully confirm the established regularities. One can foresee that carbonate melt-based SO2 removal may become a practical and economical scrubbing method for sulfur-poor flue gases emitted by non-ferrous metal production plants, thereby contributing to the limiting of harmful sulfur and NOx emissions into the atmo-sphere.
carbonate eutectic , chemical absorption , flue gases , Gibbs energy , natural gas , nitric oxide , potassium carbonate , potassium nitrite , sulfur dioxide
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Satbayev University, Almaty, Kazakhstan
Weizmann Institute of Science, Rehovot, Israel
Satbayev University
Weizmann Institute of Science
10 лет помогаем публиковать статьи Международный издатель
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