5) Plants in Europe sometimes use the mineral pyrites (containing FeS, and inerts) as a source of SO; for the production of sulphite pulping liquor. Pyrite rock containing 48.0% sulphur is burned completely with dry air by flash combustion. All the iron forms Fe,Oa in the cinder or the product gas. The gas from such a furnace is passed through milk of lime (Cao in water) absorbers to produce bisulfite pulping liquor. The exit gas from the absorber analyzes: SO, 0.7%, O, 2.9%, and N2 96.4%. Calculate the air supplied to the burner per kg of the pyrites burned. FeS, + 02 → Fe,0, + SO2

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Introduction and Basic Calculations in Multiphase Systems

Chemical calculations involve material and energy balance calculations which enable engineers to calculate material and energy requirements in various chemical processes. In addition to this, chemical calculations help to study the behavior and properties of gases, liquids, and their mixtures.