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Mixed Metal Oxide Sorbents

  • Ates Akyurtlu
Conference paper
Part of the NATO ASI Series book series (volume 42)

Abstract

High temperature desulfurization can be accomplished by using solid sorbents containing oxides of metals which form stable Sulfides. These oxides by themselves cannot meet the requirements of Integrated Gasification Combined Cycle (IGCC) and Integrated Gasification Fuel Cell (IGFC) applications. When metal oxides are mixed together and properly calcined, they form solid solutions and/or new solid compounds with markedly different thermodynamics, kinetics and physical properties. Thus, by adding other oxides to the primary desulfiirization species, it may be possible to improve its sulfur removal efficiency, prevent or slow the reduction to elemental metal, prevent sulfate formation, improve dispersion and modify porosity and pore size, and impart structural strength and stability.

Development of sorbents for high temperature operation (above 800 K) is still continuing while there is increased interest in the development of sorbents for operation in the medium temperature range (650-800 K). In the high temperature group various versions of zinc titanate sorbents and Z-Sorb are being tested under realistic conditions in pilot scale units. Work on copper-based sorbents are still at the laboratory level. In addition to these, there are reports of superior performance by several zinc-based proprietary sorbents.

Keywords

Zinc Oxide Zinc Ferrite Copper Chromite Integrate Gasification Combine Cycle Sulfur Capacity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Cicero, Daniel C.: “METC Hot Gas Desulfurization Program Overview,” Proceedings of the Coal-Fired Power Systems 94 — Advances in IGCC and PFBC Review Meeting, Volm. I, pp. 219–221, 1994.Google Scholar
  2. 2.
    Westmoreland, P. R. And D. P. Harrison: “Evaluation of Candidate Solids for High-Temperature Desulfiirization of Low-Btu Gases,” Environ. Sci. Technol 10, 659–661, 3.Google Scholar
  3. 3.
    Pineda M., J. L. Fierro, J. M. Palacios, C. Cilleruelo, and J. V. Ibarra: “Kinetic Behavior and Reactivity of Zinc Ferrites for Hot Gas Desulfurization,” J. Materials Sci. 30, 6171–6178, 1995.CrossRefGoogle Scholar
  4. 4.
    Swisher, J. H. And K. Schwerdtfeger: “Thermodynamic Analysis of Sorption Reactions for the Removal of Sulfur from Hot Gases,” J. Mater. Eng. Perform. 13, 565–572,1992.CrossRefGoogle Scholar
  5. 5.
    Lew, S., A. F. Sarofim, and M. Flytzani-Stephanopoulos: “Sulfidation of Zinc Titanate and Zinc Oxide Solids,’ Ind. Eng. Chem. Res. 31, 1890–1899, 1992.CrossRefGoogle Scholar
  6. 6.
    Lew, S., A. F. Sarofim, and M. Flytzani-Stephanopoulos: “Mechanistic and Kinetic Studies of High-Temperature Coal Gas Desulfurization Soibents,” final report on DE-FG22-88PC88927toDOE-PETC, 1991.Google Scholar
  7. 7.
    Flytzani-Stephanopoulos, M, G. R. Gavalas, K. Jothimurugesan, S. Lew, P. K. Sharma, M. J. Baajewicz, and V. Patrick: “Detailed Studies of Novel Regenerable Soibents for High-Temperature Coal-Gas Desulfurization,” Final report for DE-FG21-85MC22193 to DOE-METC, 1987.Google Scholar
  8. 8.
    Siriwardane, Ranjani V., James A. Poston, and Steven D. Woodruff: “Sulfur Capture Mechanisms,” Proceedings of the Twelfth Annual Gasification and Gas Stream Cleanup Systems Contractors Review Meeting, volume II, pp. 498–501, Morgantown, WV, September 1992.Google Scholar
  9. 9.
    Ayala, R. L, E. Gal, and R. P. Gupta: “ Enhanced Durability of High-Temperature Desulfurization Soibents for Moving-Bed Applications,” Proceedings of the Twelfth Annual Gasification and Gas Stream Cleanup Systems Contractors Review Meeting, volume I, pp. 230–239, Morgantown, WV, September 1992.Google Scholar
  10. 10.
    Ayala, Raul E., Timothy Chuck, Raghubir P. Gupta: “Moving-bed Soibents,” Proceedings of the Advanced Coal-Powered Systems ‘95 Review Meeting, Volume II, pp. 591–600, 1995.Google Scholar
  11. 11.
    Patrick, V., G. R. Gavalas, M. Flytzani-Stephanopoulos, and K. Jothimurugesan: “High-Temperature Sulfidation-Regeneration of CuO-Al2O3 Soibents,” Ind. Eng. Chem. Res. 28,931–940,1989.CrossRefGoogle Scholar
  12. 12.
    Tamhankar, S. S., M. J. Baajewicz, G. R. Gavalas, P. K Sharma, and M. Flytzani-Stephanopoulos; “Mixed-Oxide Soibents for High-Temperature Removal of Hydrogen sulfide,” Ind. Eng. Chem. Des. Dev. 25, 429–437, 1986.CrossRefGoogle Scholar
  13. 13.
    Abbasian, J., A. Rehmat, M. Flytzani-Stephanopoulos, and Z. Hu: “Development of Novel Copper-Based Sorbent for Hot Gas Cleanup,” paper presented at the 1992 AIChE Spring National Meeting, New Orleans, LA, 1992.Google Scholar
  14. 14.
    Hojllund, N. and I. G. Sigurdardottir: “Hot Gas Cleaning of Coal Gases by Sequential Absorption,” Proceedings of Twelfth Annual International Pittsburg Coal Conference, pp. 1074-1079, 1995.Google Scholar
  15. 15.
    Copeland, Robert J., Dan Feinberg, D. Wickham, Brian Windecker, and J. Yu: “High Temperature Hydrogen Sulfide Removal with Stannic Oxide” Proceedings of the Coal-Fired Power Systems 94-Advances in IGCC and PFBC Review Meeting, Volume I, pp. 444–457, 1994.Google Scholar
  16. 16.
    Akyurtlu, J. F. and A. Akyurtlu: “Hot Gas Desulfiirization With Vanadium Promoted Zinc Ferrite Sorbents,” Gas Sep. Purif 9, 17–25,1995.CrossRefGoogle Scholar
  17. 17.
    Ayala, R. E., Timothy Chuck, Eli Gal, and Raghubir P. Gupta: “Development of Soibents for High-Temperature Desulfiirization in Moving-Bed Systems,” Proceedings of the Coal-Powered Systems 95 — Advances in IGCC and PFBC Review Meeting, Volume II, pp. 637–645, 1994.Google Scholar
  18. 18.
    Ayala, Raul E., Alan Feitelberg, Anthony Furman: “Development of a High Temperature Moving-Bed Coal Gas Desulfiirization System,” Proceedings of Twelfth Annual International Pittsburgh Coal Conference, pp. 1053–1058, 1995.Google Scholar
  19. 19.
    Copeland, Robert J., Mike Cesario, Margarita Dubovic, Dan Feinberg, and Brian Windecker: “A Long Life ZnO-TiO2 Sortent,” Proceedings of the Advanced Coal-Powered Systems’ 95 Review Meeting, Volume I, pp. 394–401, 1995.Google Scholar
  20. 20.
    Copeland, Robert J., Mike Cesario, Margarita Dubovic, Dan Feinberg, Brian Windecker, and J. Yang: “A Long Life ZnO-TiO2 Sorbent for moving-bed reactors,” to be presented at the 1996 International Pittsburgh Coal Conference, Pittsburgh, PA, July 1996.Google Scholar
  21. 21.
    Sirivardane, Ranjani V., Ulrich Grimm, James Postsn, and Steven Monaco: “Desulfiirization Soibent Development at the Morgantown Energy Technology Center,” Proceedings of the Coal-Fired Power Systems 94— Advances in IGCC and PFBC Review Meeting, Volume I, pp. 662–667, 1994.Google Scholar
  22. 22.
    Gupta, Raghubir P. and Santosh K. Gangwal: “Bench-Scale Testing of Fluidized-Bed Soibents — ZT-4,” Proceedings of the Advanced Coal-Powered Systems ‘95 Review Meeting, Volume I, pp. 229–240, 1995.Google Scholar
  23. 23.
    Portzer, Jeffrey W. and Santosh K. Gangwal: “Slipstream testing of Hot-Gas Desulfiirization with Sulfur Recoveiy,” Proceedings of the Advanced Coal-Powered Systems ‘95 Review Meeting, Volume I, pp. 220–228, 1995.Google Scholar
  24. 24.
    Konttinen, Jukka, Reza Ghazanfari, Arto Lehtovaara, Wahab Mojtahedi: “Pilot Scale Experience on IGCC Hot Gas Cleanup,” Proceedings of the Advanced Coal-Powered Systems ‘95 Review Meeting, Volume I, pp. 202–214, 1995.Google Scholar
  25. 25.
    Lehtovaara, Arto and Jukka Konttinen: “Pilot Scale experience on IGCC Hot Gas Cleanup,” Proceedings of Tweflh Annual International Pittsburgh Coal Conference, pp. 1065–1072, 1995.Google Scholar
  26. 26.
    Gupta, Raghubir P.: “Spray-Dried Fluid-bed Sorbents Tests — CMP-5,” Proceedings of the Advanced Coal-Powered Systems’ 95 Review Meeting, Volume II, pp. 601–608, 1995.Google Scholar
  27. 27.
    Khane, G. P., G. A. Delzer, D. H. Kubicek, and G. J. Greenwood: “Hot Gas Desulfurization with Phillips Z-Sorb Sorbent in Moving Bed and Fluidized bed Reactors,” Environmental Progress, 14, 146–150,1995.CrossRefGoogle Scholar
  28. 28.
    Campbell, William M. and Gunnar B. Henningsen: “Hot gas Desulfurization Using Transport Reactors,” Proceedings of Twelfth Annual International Pittsburgh Coal Conference, pp. 1059–1064, 1995.Google Scholar
  29. 29.
    Swisher, J.H., M. Jhunjhunwala, L. D. Gasper-Galvin, T. H. Gardner, and K. Hammerbeck, “Properties of Sulfur Sorbents Containing Dispersed Nickel in anAl2O3 Matrix,”J. Mater. Eng. Perform., Vol. 5(No. 2), pp. 247–255, 1996.CrossRefGoogle Scholar
  30. 30.
    Hepworth, Malcolm T. and Rachid Ben-Slimane: “Hot Coal Gas Desulfurization With Manganese-Based Sorbents,” Proceedings of the Advanced Coal-Powered Systems ‘95 Review Meeting, Volume I, pp. 367–375, 1995.Google Scholar
  31. 31.
    Hepworth, Malcolm T. and Rachid Ben-Slimane: “Hot Coal Gas Desulfurization With Manganese-Based Sorbents,” Proceedings of the Coal-Fired Power Systems 94-Advances in IGCC and PFBC Review Meeting, Volume I, pp. 337–355, 1994.Google Scholar
  32. 32.
    Ayala, Raul E., Venkat S. Venkataramani, Javad Abbasian, Andy H, Hill: “Advanced Low-Temperature Sorbents,” Proceedings of the Advanced Coal-Powered Systems ‘95 Review Meeting, Volume I, pp. 407–416, 1Google Scholar
  33. 33.
    Abbasian, Javad, Andy H. Hill, Francis S. Lau, Maria Flytzani-Stephanopoulos, and Franklin I. Honea: “Fuel Gas Desulfurization at elevated Temperatures with Copper-Based Sobents,” Proceedings of Twelfth Annual International Pittsburgh Coal Conference, pp. 1189–1194,1995.Google Scholar
  34. 34.
    Li, Z. and M. Flytzani-Stephanopoulos: “Development of Novel Copper-Based Sorbents for Hot-Gas Cleanup,” final report prepared for Institute of Gas Technology, 1994.Google Scholar
  35. 35.
    Grindley, Thomas and C. Elaine Everitt: “Absorption of Hydrogen Sulfide by Zinc Ferrite in the Temperature Range 315 to 538°C,” Proceedings of the Coal-Fired Power Systems 94-Advances in IGCC and PFBC Review Meeting, Volume I, pp. 431–443, 1994.Google Scholar
  36. 36.
    Greenwood, G. I, G. P. Khare, D. H. Kubicek, G. A. Delzer, and D. L Kinsinger: “Pilot Plant Tests of Z-Sorb Sorbent,” Proceedings of the Coal-Fired Power Systems 95-Advances in IGCC and PFBC Review Meeting, Volume I, pp. 241–246, 1995.Google Scholar
  37. 37.
    Mangnus, P. J., A. Bos, and J. A. Moulijn: “Temperature-Programmed Reduction of Oxidic and Sulfidic Alumina-supported NiO, WO3, and NiO-WO3 Catalysts,” J. Catal 146, 437–448 (1994).CrossRefGoogle Scholar
  38. 38.
    Khare, G. P., G. J. Greenwood, D. H. Kubicek, and G. A. Delzer: “Regenerable Sorbents for Low Temperature Desulfurization of Coal Gas,” Proceedings of Twelfth Annual International Pittsburgh Coal Conference, pp. 1080–1085, 1995.Google Scholar
  39. 39.
    Jothimurugesan, K., A. A. Adeyiga, and S. K. Gangwal: “Development of Advanced Hot-Gas Desulfiirization Sorbents,” Proceedings of the Advanced Coal-Powered Systems ‘95 Review Meeting, Volume I, pp. 402–406, 1995.Google Scholar
  40. 40.
    Jothimurugesan, K and Santosh K. Gangwal: “Advanced Hot-gas Desulfiirization Sorbents, ” to be presented at the Advanced Coal-Powered Systems ‘96 Review Meeting, Morgantown, WV, July 1996.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Ates Akyurtlu
    • 1
  1. 1.Department of Chemical EngineeringHampton UniversityHamptonUSA

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