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Korean Journal of Chemical Engineering

, Volume 16, Issue 5, pp 595–601 | Cite as

Oxidative coupling of methane over promoted strontium chlorapatite

  • Yoon Kyung Bae
  • Jin Hyuk Jun
  • Ki June Yoon
Article

Abstract

Strontium zirconium phosphate, unpromoted strontium chlorapatite and strontium hydroxyapatite showed low C2 selectivity for the oxidative coupling of methane, but promoted strontium chlorapatite catalysts showed markedly increased activity and selectivity and also exhibited stable behavior. SrCl2 was the primary promoter and strontium zirconium oxides were considered to be acting as other promoters, but strontium zirconium phosphate and strontium carbonate seemed to be acting adversely. A promoted strontium chlorapatite catalyst which contained a slightly larger amount of SrCl2 than needed to form the chlorapatite showed the best performance and was stable up to 50 h at 1,023 K, and the highest C2+ selectivity and yield were 52% and 13.8%, respectively. Although SrCl2 was more stable than NaCl it decomposed slowly during the reaction, leaving strontium oxide or strontium carbonate behind, which is considered to result in slow deactivation of the catalyst.

Key words

Methane Oxidative Coupling Strontium Chloride Strontium Chlorapatite Strontium Zirconium Phos-phate 

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References

  1. Amenomiya, Y., Birss, V. I., Goledzinowski, M., Galuszka, J. and Sanger, A. R., “Conversion of Methane Oxidative Coupling,”Catal. Rev.-Sci. Eng.,32,163 (1990).CrossRefGoogle Scholar
  2. Baeck, S. H., Chung, J. S. and Lee, W. Y, “Oxidative Coupling of Methane over BiOCl-Li2CO3-Sm2O3 Catalyst”HWAHAK KONGHAK,36,429 (1998).Google Scholar
  3. Chang, J.-S., Park, S.-E. and Lee, Y K., “Characterization of Cobalts-Exchanged Synthetic a-Zirconium Phosphate,”HWAHAKKONGHAK,27, 323 (1989).Google Scholar
  4. Cho, W., Baek, Y, Pang, H. and Kim, Y C, “A Direct Catalytic Conversion of Natural Gas to C2+ Hydrocarbons by Microwave Plasma,”Korean J. Chem. Eng.,15,500 (1998).CrossRefGoogle Scholar
  5. Clearfield, A., Landis, A. L., Medina, A. S. and Troup, J. M., “More on Crystalline Zirconium Phosphates,”J. Inorg. Nucl. Chem.,35, 1099 (1973).CrossRefGoogle Scholar
  6. Guo, X.-M., Hidaiat, K. and Ching, C.-B., “An Experimental Study of Oxidative Coupling of Methane in a Solid Oxide Fuel Cell with 1 wt% Sr/La2O3-Bi2O3-Ag-YSZ Membrane”Korean J. Chem. Sng.,15,469 (1998).Google Scholar
  7. Hutchings, G. J. and Scurrell, M. S., “Methane Conversion by Oxidative Processes: Fundamental and Engineering Aspects,” Wolf, E. E., ed., Van Nostrand Reinhold, New York, 200 (1992).Google Scholar
  8. Kim, C. S. and Lee, W. Y, “The Reaction Characteristics of Oxidative Coupling of Methane over Ba- and Sr-based Catalysts,”HWAHAKKONGHAK,31, 62 (1993).Google Scholar
  9. Kim, S.-C, Sunwoo, C.-S. and Yu, E.-Y, “The Effect of Alkali Promoters in Oxidative Coupling of Methane with Mn-Oxide Catalysts,”Korean J. Chem. Eng.,7, 279 (1990).Google Scholar
  10. Kim, S.-C. and Yu, E.-Y, “The Oxidative Coupling of Methane over Supported Zinc Oxide Catalyst with Alkali Promoters,”HWAHAK KONGHAK,28, 536 (1990).Google Scholar
  11. Kim, S. H., Cho, S. M. and Yoon, K. J., “Oxidative Coupling of Methane over Na+-ZrO2-Cl-/Al2O3 Catalysts,”Korean J. Chem. Eng.,14, 69 (1997).CrossRefGoogle Scholar
  12. Kong, S. J., Bae, Y K. and Yoon, K. J., “Oxidative Coupling of Methane over Sodium-Chloride-Added Sodium Zirconium Phosphates,”Korean J. Chem. Eng.,16, 234 (1999).CrossRefGoogle Scholar
  13. Lee, J. S. and Oyama, S. T, “Effect of Reaction Temperature on the Selectivity of Oxidative Coupling of Methane over Lead Oxide,”Korean J. Chem. Eng.,6, 54 (1989).CrossRefGoogle Scholar
  14. Lee, J. S. and Oyama, S. T, “Oxidative Coupling of Methane to Higher Hydrocarbons,”Catal. Rev.Sci. Eng.,30, 249 (1988).CrossRefGoogle Scholar
  15. Lee, K.-Y, Han, Y.-C, Suh, D. J. and Park, T J., “Pb-substituted Hydroxyapatite Catalysts Prepared by Coprecipitation Method for Oxidative Coupling of Methane,” in “Natural Gas Conversion V,” Parmaliana, A., Sanfilippo, D., Frusteri, F, Vaccari, A. and Arena, F, Eds., Else vier, Studies in Surf. Sci. Catal., 119, 385 (1998).Google Scholar
  16. Maitra, A. M., “Critical Performance Evaluation of Catalysts and Mechanistic Implications for Oxidative Coupling of Methane,”Applied Catalysis A: General,104,11 (1993).CrossRefGoogle Scholar
  17. Matsumura, Y, Sugiyama, S., Hayashi, H. and Moffat, J. B., “An Apparent Ensemble Effect in the Oxidative Coupling of Methane on Hydroxyapatite with Incorporated Lead,”Catal. Lett.,30, 235 (1995).CrossRefGoogle Scholar
  18. Nagamoto, H., Amanuma, K., Nobutomo, H. and Inoue, H., “Methane Oxidation over Perovskite-type Oxide Containing Alkaline-earth Metal,”Chem, Lett., 237 (1988).Google Scholar
  19. Segawa, K., Kurusu, Y. and Kinoshita, M., “Catalysis by Acids and Bases,”Imelik, B., ed., Elsevier, Amsterdam, B.V., 83 (1985a).Google Scholar
  20. Segawa, K., Kurusu, Y., Nakajima, Y. and Kinoshita, M., “Characterization of Crystalline Zirconium Phosphates and Their Isomerization Activities,”J. Catal.,94,491 (1985b).CrossRefGoogle Scholar
  21. Sugiyama, S., Matsumoto, H., Hayashi, H. and Moffat, J. B., “Decomposition of Tetrachloromethane on Calcium Hydroxyapatite under Methane Oxidation Conditions,”Appl. Catal. B,20, 57 (1999).CrossRefGoogle Scholar
  22. Sugiyama, S., Minami, T., Hayashi, H., Tanaka, M. and Moffat, J. B., “Surface and Bulk Properties of Stoichiometric and Nonstoichiometric Strontium Hydroxyapatite and the Oxidation of Methane,”J. Solid State Chem.,126,242 (1996).CrossRefGoogle Scholar
  23. Yang, W. M., Yan, Q. J. and Fu, X. C, “A Comparative Study of Catalytic Behaviours of Sr-Ti, Sr-Zr, Sr-Sn Perovskites and Corresponding Layered Perovskites for the Oxidative Coupling of Methane,” in “Methane and Alkane Conversion Chemistry” Bhasin, M. M. and Slocum, D. W., Eds., Plenum, New York, 71 (1995).Google Scholar
  24. Yoon, K J. and Seo, S. W., “Oxidative Coupling of Methane over Sodium-salt-promoted Zirconia Catalysts Prepared by the Mixed Solution Method,”Applied Catalysis B,7, 237 (1996).CrossRefGoogle Scholar
  25. Yoon, K J. and Seo, S. W., “The Catalyst for Oxidative Coupling of Methane Prepared from Zirconyl Chloride and Sodium Pyrophosphate,”Applied Catalysis A,161, L5 (1997).CrossRefGoogle Scholar

Copyright information

© Korean Institute of Chemical Engineering 1999

Authors and Affiliations

  1. 1.Department of Chemical EngineeringSung Kyun Kwan UniversitySuwonKorea

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