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Absorption of SO 2 in Fixed-bed Calc
https://doi.org/10.18412/1816-0387-2015-5-6-10
Abstract
Calcite is used in the combustion of high-sulfur fuels to reduce emissions of SO2. However, at temperatures above 700 °С, calcite and resulting calcium sulfate begin to sinter, which negatively affects the binding of SO2and complicates the mathematical modeling of the process. Catalytic combustion reduces the maximal temperature of fuel combustion from 1200 °С to 700 °С, thereby reducing the sintering of materials and allowing the use of simpler model calculations. The aim of this work was to develop a simplified model of the observed kinetics of the process on the basis of experimental data obtained at 500–600 °С in a reactor with fixed-bed calcite. According to the model, the absorption of SO2 is the reaction of the second order (the first order with respect to the concentration of SO2 and the first order with respect to a number of free centers capable of binding SO2), and vacancy centers decreases linearly with an increase in the amount of absorbed SO2. Kinetic parameters of the model — the reaction rate constant and the ultimate capacity of calcite toward SO2 – were determined.
About the Authors
Y.V. Dubinin
Boreskov Institute of Catalysis SB RAS
Russian Federation
Russian Federation
S.G. Zavarukhin
Boreskov Institute of Catalysis SB RAS
Russian Federation
Russian Federation
D.A. Simonov
Boreskov Institute of Catalysis SB RAS
Russian Federation
Russian Federation
N.A. Yazykov
Boreskov Institute of Catalysis SB RAS
Russian Federation
Russian Federation
V.A. Yakovlev
Boreskov Institute of Catalysis SB RAS
Russian Federation
Russian Federation
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Review
For citations:
Dubinin Y., Zavarukhin S., Simonov D., Yazykov N., Yakovlev V. Absorption of SO 2 in Fixed-bed Calc. Kataliz v promyshlennosti. 2015;15(5):6-10. (In Russ.) https://doi.org/10.18412/1816-0387-2015-5-6-10
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