OPTIMAL TEMPERATURE OF FIXED-BED REACTOR FOR HIGH TEMPERATURE REMOVAL OF HYDROGEN SULFIDE

Lee YS; Yoo KO; Gavalas GR

Korean Journal of Chemical Engineering, Vol.8, No.4, 214-219, October, 1991

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.

[References]

Reeve LJ, Inst. Fuel, 31, 319 (1958)
Bureau AC, Olden MJF, Chem. Eng., 49, 55 (1967)
Phillipson JJ, Desulfurization in Catalyst Handbook, Wolf, London, England (1970)
Curran GP, Clancey JT, Pasek B, Pell M, Rutledge GD, Gorin EP, Final Report, EPA Contract No. EHSD 71-15 (1973)
Tamhankar SS, Wen CY, American Chemical Society (1983)
Westmoreland PR, James BG, Douglas PH, Environ. Sci. Technol., 11, 488 (1977)
Krishnan GN, Lamoreaux RH, Brittair RD, Woo BJ, "Investigation of Sulfate Formation during Regeneration of Zinc Ferrite Sorbent," Quartery Technical Process Report 1, Doe/DE-AC-21-83MC 20092, SRI Project No. DYU 6434 (1983)
Won S, Sohn HY, Metal. Trans. B, 16B, 163 (1985)
Szekely J, Evans JW, Sohn HY, "Gas-Solid Reaction," Academic Press, New York, p. 126 (1976)
Sohn H, Szekely J, Chem. Eng. Sci., 26, 1901 (1971)
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)
Marcilly C, Courty P, Delmon G, J. Am. Ceram. Soc., 53, 56 (1970)
Yoo KO, Research Institute of Industrial Science H.Y. Univ., Research Report, vol. 25, 1023-1030 (1987)
Won H, "The Kinetics of Reaction between ZnO and H₂S at High Temperature," Master Thesis (1988)
Kim JS, "The Reaction Kinetics between Zinc Ferrite and Hydrogen Sulfide," Master Thesis (1989)
Lew S, Jothimurugesan K, Stephanopoulos MF, Ind. Eng. Chem. Res., 28, 5 (1989)
Kunugita E, Nishitani H, Tao XW, J. Chem. Eng. Jpn., 22(3), 258 (1988)
"Deactivation and Poisoning of Catalyst," ed. Oudar, J. and Wise. H. Marcel Dekker, New York and Basel, p. 289 (1985)
"The Chemical Physics of Solid Surfaces and Heterogeneous Catalysis," ed. King, D.A. and Woodruff, D.P., Elsevier Scientific Publishing Company, Vol. 3, p. 163 (1984)
Mutasher EI, Bowen JH, Ind. Eng. Chem. Res., 28, 1550 (1989)
Levenspiel O, "Chemical Reaction Engineering," John Wiley & Sons, Inc., New York, p. 286 (1972)

[Referenced By]

[1] Reeve LJ, Inst. Fuel, 31, 319 (1958)

[2] Bureau AC, Olden MJF, Chem. Eng., 49, 55 (1967)

[3] Phillipson JJ, Desulfurization in Catalyst Handbook, Wolf, London, England (1970)

[4] Curran GP, Clancey JT, Pasek B, Pell M, Rutledge GD, Gorin EP, Final Report, EPA Contract No. EHSD 71-15 (1973)

[5] Tamhankar SS, Wen CY, American Chemical Society (1983)

[6] Westmoreland PR, James BG, Douglas PH, Environ. Sci. Technol., 11, 488 (1977)

[7] Krishnan GN, Lamoreaux RH, Brittair RD, Woo BJ, "Investigation of Sulfate Formation during Regeneration of Zinc Ferrite Sorbent," Quartery Technical Process Report 1, Doe/DE-AC-21-83MC 20092, SRI Project No. DYU 6434 (1983)

[8] Won S, Sohn HY, Metal. Trans. B, 16B, 163 (1985)

[9] Szekely J, Evans JW, Sohn HY, "Gas-Solid Reaction," Academic Press, New York, p. 126 (1976)

[10] Sohn H, Szekely J, Chem. Eng. Sci., 26, 1901 (1971)

[11] Gibson JB, Harrison DP, Ind. Eng. Chem. Process Des. Dev., 19, 231 (1980)

[12] Tamhankar SS, Wen CY, Chem. Eng. Sci., 36, 1181 (1981)

[13] Tamhankar SS, Bagajewiz M, Gavalas GR, Ind. Eng. Chem. Process Des. Dev., 25, 429 (1986)

[14] Marcilly C, Courty P, Delmon G, J. Am. Ceram. Soc., 53, 56 (1970)

[15] Yoo KO, Research Institute of Industrial Science H.Y. Univ., Research Report, vol. 25, 1023-1030 (1987)

[16] Won H, "The Kinetics of Reaction between ZnO and H₂S at High Temperature," Master Thesis (1988)

[17] Kim JS, "The Reaction Kinetics between Zinc Ferrite and Hydrogen Sulfide," Master Thesis (1989)

[18] Lew S, Jothimurugesan K, Stephanopoulos MF, Ind. Eng. Chem. Res., 28, 5 (1989)

[19] Kunugita E, Nishitani H, Tao XW, J. Chem. Eng. Jpn., 22(3), 258 (1988)

[20] "Deactivation and Poisoning of Catalyst," ed. Oudar, J. and Wise. H. Marcel Dekker, New York and Basel, p. 289 (1985)

[21] "The Chemical Physics of Solid Surfaces and Heterogeneous Catalysis," ed. King, D.A. and Woodruff, D.P., Elsevier Scientific Publishing Company, Vol. 3, p. 163 (1984)

[22] Mutasher EI, Bowen JH, Ind. Eng. Chem. Res., 28, 1550 (1989)

[23] Levenspiel O, "Chemical Reaction Engineering," John Wiley & Sons, Inc., New York, p. 286 (1972)