Kinetics of manganous oxide sulfidization in carbonyl sulfide (COS) contaminated atmospheres |
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Authors: | H Ahmadzai L -I Staffansson |
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Affiliation: | 1. National Environmental Protection Board (SNV), Box 1302, S-171 25, Solna, Sweden 2. Department of Theoretical Metallurgy, Royal Institute of Technology, S-100 44, Stockholm, Sweden
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Abstract: | To contribute to the mitigation of man-made emission of sulfurous compounds, the susceptibility of manganous oxide for carbonyl
sulfide under reducing atmospheres (C-O-S system) has been investigated over the temperature range 700 to 1010 °C (973 to
1283 K). The kinetic investigation employed thermogravimetry and anin situ solid electrolyte oxygen probe to follow the topochemical reaction of spherical MnO pellets under various experimental conditions.
The apparent activation energy of sulfidization of manganous oxide, under measured oxygen potentials in the C-O-S system,
was determined to be 12.06 (±1.5) kcal/mol (52.33 (±6.28) kJ/mol). Overall sulfidization appeared to proceed by mixed control
involving convective mass transfer of COS across the boundary layer and diffusion through the product layer.
Formerly with the Department of Theoretical Metallurgy, Royal Institute of Technology, Stockholm |
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