Abstract
Selective oxidation of hydrogen sulfide (H2S) was studied on zeolite-NaX and zeolite-KX. Elemental sulfur yield over zeolite-NaX was achieved about 90% at 225 °C for the first 4 hours, but it gradually decreased to 55% at 40 hours after the reaction started. However, yield of elemental sulfur on zeolite-KX was obtained within the range of 86% at 250 °C after 40 hours. The deactivation of the zeolite-NaX and -KX catalysts was caused by the coverage of a sulfur compound, produced by the selective oxidation of H2S over the catalysts. The coverage of a sulfur compound over the zeolite-NaX and -KX was confirmed by the TPD (temperature-programmed desorption) tests utilizing thermogravimetric analysis and FT-IR analysis. Even though high temperature was required to prevent the deactivation of zeolite-NaX, the temperature cannot be raised to 250 °C or above due to the SO2 production and the decrease of thermodynamic equilibrium constant. Zeolite-KX was superior to the zeolite-NaX for both its selectivity to elemental sulfur and its resistance to deactivation in the selective oxidation of H2S.
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References
Chang, Y.-C. and Ko, A.-N., “Vapor Phase Reactions of Acetaldehyde over Type X Zeolites,”Appl. Catal.A: General,190, 149 (2000).
Chopin, T. and Geus, J. W., Eur. Patent 422,999 (1990).
Cho, Y.-G., Hwang, B.-H., Park, D.-W., Woo, H.-C. and Chung, J.-S., “Phase Cooperation of V2O5 and Bi2O3 in the Selective Oxidation of H2S Containing Ammonia and Water,”Korean J. Chem. Eng.,19, 611 (2002).
Chun, S. W., Jang, J. Y., Park, D. W., Woo, H. C. and Chung, J. S., “Selective Oxidation of H2S to Elemental Sulfur over TiO2/SiO2 Catalysts,”Appl. Catal. B: Environmental,16, 235 (1998).
Goar, E. N., MacDougall, R. S. and Lagasb, J. A., “New Catalysts Improves Sulfur Recovery at Canadian Plant,”Oil & Gas J.,92, 5727 (1994).
Hamamatsu, T., “Future View of Fossil Fuel Power Generation of Coal IGCC,”J. Gas. Turb. Soc. Jpn.,18, 3 (1993).
Huang, M., Auroux, A. and Kaliaguine, S., “Crystallinity Dependence of Acid Site Distribution in HA, HX and HY Zeolites,”,Microporous Materials,5, 17 (1995).
Keller, N., Pham-Huu, C., Estournes, C. and Ledoux, M. J., “Low Temperature Use of SiC-Supported Iron Catalysts into Elemental Sulfur above its Dewpoint,”Appl. Catal.A: General,234, 191 (2002).
Kettner, R., Lubcke, T. and Liermann, N., Eur. Patent 78,690 (1982).
Kim, B.-K., Hwang, B-H., Lee, H.-S., Woo, H.-C. and Park, D.-W., “Selective Oxidation of H2S to Ammonium Thiosulfate and Elemental Sulfur Using Mixtures of V-Bi-O and Sb2O4,”,Korean J. Chem. Eng.,21, 104 (2004).
Laperdrix, E., Costentin, G., Nguyen, N., Studer, F. and Lavalley, J. C., “Selective Oxidation of H2S over CuO/Al2O3: Identification and Role of the Sulfurated Species Formed on the Catalyst During the Reaction,”Catal. Today,61, 149 (2000).
Lee, T. J., Kwon, W. T., Chang, W. C. and Kim, J. C., “A Study on Regeneration of Zinc Titanate Sorbents for H2S Removal,”,Korean J. Chem. Eng.,14, 513 (1997).
Nyquist, R. A. and Kagel, R. O.,Infrared Spectra of Inorganic Compounds (3800-45 cm −1), Academic Press, New York (1994).
Park, D. W., Park, B. K., Park, D. K. and Woo, H. C., “Vanadium-antimony Mixed Oxide Catalysts for the Selective Oxidation of H2S Containing Excess Water and Ammonia,”Appl. Catal. A: General,223, 215 (2002).
Pi, J. H., Lee, D. H., Lee, J. D., Jun, J. H., Park, N. K., Ryu, S. O. and Lee, T. J., “The Study on the Selective Oxidation of H2S over the Mixture Zeolite NaX-WO3 Catalysts,”,Korean J. Chem.Eng.,21, 126 (2004).
Pi, J. H., Lee, J. D., Park, N. K., Ryu, S. O. and Lee, T. J., “The Effect of Modified Zeolite X Catalysts on the Selective Oxidation of H2S,”J. Korean Ind. Eng. Chem.,14(6), 837 (2003).
Ryu, S. O., Park, N. K., Chang, C. H., Kim, J. C. and Lee, T. J., “Multicyclic Study on Improved Zn/Ti-Based Desulfurization Sorbents in Mid-Temperature Conditions,”Ind. Eng. Chem. Res., 43, 1499 (2004).
Shin, M. Y., Nam, C. M., Park, D. W. and Chung, J. S., “Selective Oxidation of H2S to Elemental Sulfur over VOX/SiO2 and V2O5 Catalysts,”Appl. Catal. A: General,211, 213 (2001).
Terorde, R.J.A.M., van den Brink, auP. J., Visser, L. M., van Dillen, A. J. and Geus, J. W., “Selective Oxidation of Hydrogen Sulfide to Elemental Sulfur Using Iron Oxide Catalysts on Various Supports,”Catal. Today,16, 263 (1993).
Van Nisselrooya, P. F M. T. and Lagasb, J. A., “Superclaus Reduces SO2 Emission by the Use of a New Selective Oxidation Catalyst,”Catal. Today,16, 263 (1993).
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Lee, J.D., Jun, J.H., Park, NK. et al. A study on selective oxidation of hydrogen sulfide over zeolite-NaX and-KX catalysts. Korean J. Chem. Eng. 22, 36–41 (2005). https://doi.org/10.1007/BF02701459
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DOI: https://doi.org/10.1007/BF02701459