Mirny Polytechnic Institute–Division of the Ammosov North-Eastern Federal University, Mirny, Russia

M. S. Ivanova, Associate Professor, Candidate of Chemical Sciences, ims.06@mail.ru
K. O. Tomskiy, Head of Department, Candidate of Engineering Sciences

One of the problematic ecological issues of the modern mining industry is the accrescent acid emissions, including carbon and sulfur dioxides. Oxides resultant from complete combustion of hydrocarbon fuel can be trapped using a number of methods. The most effective approach is catalysis. This article discusses catalytic removal of carbon and sulfur dioxides in fluorine-bearing environments such as different-concentration suspensions of calcium fluoride, and determines optimum conditions of the catalytic removal process in such suspensions. The tests of catalytic removal of carbon and sulfur dioxides in a fluorine-bearing environment were carried out under the atmospheric pressure and temperature of 25 °C. The dioxides were passed through the calcium fluoride suspensions of different concentrations. For finding the influence exerted by the treated gas flow rate on the sorption efficiency of the calcium fluoride suspension, the carbon and sulfur dioxides were passed through the suspension at the flow rates of 5∙10^–7 to 2∙10^–6 m³/s. For recovering catalytic activity of the used calcium fluoride suspension, the system was treated with the atmospheric oxygen flow for one hour. After such regenerative treatment, the catalytic system recovered its oxidation power completely. The authors demonstrate the potential of catalytic removal of acid gases SO₂ and CO₂ in the calcium fluoride environment. The optimum conditions for the treatment are determined: feed rate of gas flow to the absorbent and concentrations of catalytic systems.

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