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OPTIMAL TEMPERATURE OF FIXED-BED REACTOR FOR HIGH TEMPERATURE REMOVAL OF HYDROGEN SULFIDE
Korean Journal of Chemical Engineering, October 1991, 8(4), 214-219(6), 10.1007/BF02707186
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Abstract
To find optimal temperature of the reaction between H2S gas and ZnO-5 at% Fe2O3 sorbent, the effluent gas from a fixed-bed reactor was analyzed by gas chromatography. The experimental results showed that H2S removal efficiency of sorbent was maximum at 650℃ and EDX data were in accordance with this feature. XRD analysis exhibited intriguing phenomenon in that different mechanisms were observed at different temperatures. Chemisorption and chemical reaction was considered to be the main mechanism of H2S removal at 600℃, respectively. SEM photographs supported this interesting phenomenon, but unfortunately TGA and DAT results could not distinguish it. To investigate the effect of sorbent deactivation on the reaction rate, deactivating factor was considered.
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Szekely J, Evans JW, Sohn HY, "Gas-Solid Reaction," Academic Press, New York, p. 126 (1976)
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Gibson JB, Harrison DP, Ind. Eng. Chem. Process Des. Dev., 19, 231 (1980)
Tamhankar SS, Wen CY, Chem. Eng. Sci., 36, 1181 (1981)
Tamhankar SS, Bagajewiz M, Gavalas GR, Ind. Eng. Chem. Process Des. Dev., 25, 429 (1986)
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Kim JS, "The Reaction Kinetics between Zinc Ferrite and Hydrogen Sulfide," Master Thesis (1989)
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Levenspiel O, "Chemical Reaction Engineering," John Wiley & Sons, Inc., New York, p. 286 (1972)
