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KMID : 1024519990080010125
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Journal of the Environmental Sciences
1999 Volume.8 No. 1 p.125 ~ p.133
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Kinetic of High-Temperature Removal of H₂S by Ca-based Sorbents
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Kim Young-Sik
Jeon Ji-Hwan
Son Byung-Hyun
Jung Jong-Hyun
Jung Duck-Young
Oh Kwang-Joong
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Abstract
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Sorbents of calcined limestone and oyster particles having a diameter of about 0.63mm were exposed to simulated fuel gases containing 5000ppm for temperatures ranging from 600 to 80 in a TGA (Thermalgravimetric analyzer). The reaction between CaO and proceeds via an unreacted shrinking core mechanism. The sulfidation rate is likely to be controlled primarily by countercurrent diffusion through the product layer of calcium sulfide(CaS) formed. The kinetics of the sorption of by CaO is sensitive to the reaction temperature and particle size, and the reaction rate of oyster was faster than the calcined limestone.
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KEYWORD
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sulfidation kinetics, unreacted shrinking core model, hydrogen sulfide, calcium oxide, desulfurization
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