Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study on Preparation and Reactivity of Zinc Titanate Sorbents for H2S Removal

아연-티타늄 복합산화물 탈황제의 제조 및 반응특성 연구

  • Kim, Ki-Seok (School of Chemical Engineering and Technology, Yeungnam University) ;
  • Park, No-Kuk (School of Chemical Engineering and Technology, Yeungnam University) ;
  • Lee, Tae-Jin (School of Chemical Engineering and Technology, Yeungnam University)
  • 김기석 (영남대학교 화학공학 및 공업화학부) ;
  • 박노국 (영남대학교 화학공학 및 공업화학부) ;
  • 이태진 (영남대학교 화학공학 및 공업화학부)
  • Received : 1996.11.14
  • Accepted : 1997.01.10
  • Published : 1997.02.10
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Abstract

Zinc titanate sorbents for $H_2S$ removal were prepared and their reactivities were studied for high temperature desulfurization of coal gas. Sulfidation of zinc titanates by $H_2S$ sorption was conducted in a packed-bed tubular flow reactor at the temperature range of $550{\sim}750^{\circ}C$, and the results reveal that $650^{\circ}C$ was the optimal sulfidation temperature with respect to desulfurization efficiency and zinc loss. The structural change of sorbent particle was investigated by SEM analysis for the forbents sulfided at $650^{\circ}C$ and subsequently regenerated at $750^{\circ}C$. The stability of desulfurization capability as well as the mechanical stability of the zinc titanates was studied by means of the successive cycles of sulfidation-regeneration of sorbents, and the sorbent samples taken after the 10th cycle were characterized using BET, XRD, and SEM/EDX analyses. Zinc titanate sorbents exhibited nearly constant desulfurization capability in the successive cycle operation.

아연-티타늄 복합금속산화물 탈황제를 제조하여 석탄가스중의 $H_2S$를 제거하는 고온탈황성능을 연구하였다. $H_2S$ 흡수에 의한 탈황제의 황화반응실험을 충전층 관형 흐름반응기를 사용하여 $550{\sim}750^{\circ}C$ 범위에서 수행한 결과 탈황율과 아연성분의 손실측면에서 $650^{\circ}C$가 최적 황화반응 온도임이 밝혀졌다. SEM 분석에 의해서 $650^{\circ}C$에서의 황화반응과 $750^{\circ}C$에서의 재생반응에 따른 탈황제 입자의 구조변화를 관찰하였다. 탈황성능의 지속성과 탈황제 내구성을 평가하기 위하여 연속적인 황화-재생 cycle 반응실험을 수행하였으며 10번째 cycle 이후에 수거반 탈황제 시료의 특성을 BET, XRD, SEM/EDX에 의해서 분석하였다. 아연-티타늄 복합 산화물 탈황제는 연속적인 황화-재생 cycle 동안에 거의 일정한 탈황성능을 나타내었다.

Keywords

Acknowledgement

Grant : 국산기기시험연구과제

Supported by : 한국과학재단

References

  1. 제3회 신 · 재생에너지기술개발 및 동향에 관한 세미나 미국의 청정 석탄활용 기술 현황 이인철;진경태;손재익
  2. 석탄가스화 복합발전용 고온 건식탈황기술 개발(Ⅰ), 한국전력공사기술연구원 보고서 박영성;이태진(등)
  3. Proceeding of the Coal-Fired Power Systems 94-Advanices in PGCC and PFBC Review Meeting, DOE/METC 94/1008 v.1 Hot Coal Gas Desulfurization with Manganes-Based Sorbents M. T. Heworth;R. Ben-Silmane
  4. Proceedings of the Coal-Fired Power Systems 94-Advances in IGCC and PFBC Review Meeting, DOE/METC 94/1008 v.1 Adsorption of Hydrogen Sulfide by Zinc Ferrite in the Temperature Range 315 to 538℃ T. Grindley;C. E. Everitt
  5. Proceedings of the Coal-Fired Power Systems 93-Advances in IGCC and PFBC Review Meeting, DOE/METC93/6131 Fixed-Bed Testing of a Molybdenum-Promoted Zinc Titanate Sorbent for Hot Gas Desulfurization J. S. Mei;L. D. Gasper-Galvin;C. E. Everitt;S. Katta
  6. Chem. Eng. Sci. v.44 L. N. Sa;G. D. Focht;P. V. Ranade;d. P. Harrision
  7. Proceedings of the Seventh Annual Gasification and Gas Stream Cleanup Systems Contractors' Review Meeting, DOE/METC 87/66079 v.2 KRW Process Development Coal Gasification Hot-Gas Cleanup G. B. Haldipur(et al.)
  8. Proceedings of the Nineth Annual Gasification and Gas Stream Cleanup Systems Contractors' Review Meeting, DOE/METC 89/6106 v.1 Integration and Testing of Hot Gas Desulfurization and Entrained Flow Gasification for Power Generation Systems J. C. Wu;A. M. Robin;J. S. Kassman
  9. Proceedings of the Twelfth Annual Gasification and Gas Stream Cleanup systems Contractors' Review Meeting, DOE/METC92/6128 v.1 Integration and Testing of Hot Gas Desulfurization and Entrained Flow Gasification for Power Generation Systems A. M. Robin;D. Y. Jung;J. S. Kassman;T. F. Leininger;J. K. Wolfenbarger;P. P. Yang
  10. U.S. Patent 5,254,516 Fluidizable Zinc Titanate Materials with High Chemical Reactivity and Attrition Resistance R. P. Gupta;S. K. Gangwal
  11. Proceedings of the Coal-Fired Power Ssytems 93-Advances in IGCC and PFBC Review Meeting, DOE/METC 93-6131 Desulfurization of Hot Fuel Gas with Z-SorbⅢ Sorbent W. M. Campbell;J. J. O'Donnell;S. Katta;T. Grindley;G. Delzer;G. Khare
  12. Topical Report to DOE/METC, Contract No. DE-AC21-88MC25006 High-Temperature, High-Pressure Testing of Zinc Titanate in a Bench-Scale Fluidized-Bed Reactor for 100 Cycles R. P. Gupta;S. K. Gangwal
  13. Proceedings of the Coal-Fired Power Systems 93-Advances in IGCC and PFBC Review Meeting, DOE/METC 93/6131 Enhanced Durability of High-Temperautre Desulfurization Sorbents for Fluidized-Bed Applications S. K. Gangwal;R. P. Gupta
  14. Proceedings of the Coal-Fired Power Systems 93-Advances in IGCC and PFBC Review Meeting, DOE/METC 93/6131 Testing of Zinc Titanate Desulfurization Sorbents for Moving-Bed Applications R. E. Ayala;E. Gal;R. P. Gupta
  15. Topical Report to METC, Contract No. DE-AC21-88MC25006 Enhanced Durability of High-Temperature Desulfurization Sorbents for Fluidized-Bed Applications R. P. Gupta;S. K. Gangwal
  16. Topical Report to METC, Contract No. DE-AC21-88MC25003 Enhanced Durability of High-Temperature Desulfurization Sorbents for Moving-Bed Applications Option 2 Program : Development and Testing of Zinc Titanate Sorbents R. E. Ayala
  17. 한국전력공사기술연구원보고서, KRC-92G-J11 석탄가스화 복합발전 기술개발(Ⅰ) 지평삼(외 14인)
  18. private communicatio ns S. K. Gangwal