Synthesis and Investigation of Granulated Iron-Manganese Concretions for the Purification of Flue Gas of Heat and Power Plants from SO2
N. V. SHIKINA1, S. R. KHAIRULIN1, V. V. KUZNETSOV1, N. A. RUDINA1, Z. R. ISMAGILOV1,2
1Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090 (Russia)
2Institute of Coal Chemistry and Material Science, Siberian Branch of the Russian Academy of Sciences, Pr. Sovetskiy 18, Kemerovo 650000 (Russia)
Keywords: SO2 purification, adsorbent, granulation, binder, sorption capacity, iron-manganese concretions
Abstract
Methods of granulation of natural iron-manganese concretions (IMC) for obtaining adsorbents of gas purification from sulphur dioxide were developed. Granulated samples containing 80 to 100 % IMC and binders of different chemical nature were studied by means of the thermal desorption of Ar, low temperature adsorption of N2, mercury porosimetry, TGA, SEM, determination of mechanical strength. Dependences of the physicochemical parameters of samples on chemical composition and thermal treatment within the range 100–400 °C were established. Granulated samples were tested in SO2 sorption. It was established that the sorption capacity of samples with respect to SO2 increases with an increase in adsorbent humidity. The optimal compositions of adsorbents, conditions of their thermal treatment are determined; recommendations for the use of the developed adsorbents in the processes of gas purification from sulphur dioxide are presented.
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