Issue
Korean Journal of Chemical Engineering,
Vol.14, No.6, 513-518, 1997
A Study on Regeneration of Zinc Titanate Sorbents for H2S Removal
In this study the regeneration of used zinc titanate sorbents for high temperature desulfurization of fuel gases was investigated. Zinc titanate sorbents with Zn/Ti molar ratio of 1.5 were prepared and the regeneration was carried out in quartz fixed-bed reactor of 1 cm diameter. Regeneration of zinc titanate sorbents at high temperature is exothermic reaction that brings about deterioration of sorbents. So far experimental parameters such as reaction temperature, concentration of oxygen, flowrate and steam content have been considered to obtain suitable regeneration conditions. H2S and SO2 breakthrough curves were obtained during desulfurization-regeneration. Also, properties of the sorbents before and after regeneration were analyzed using SEM, XRD, Hg-porpsimetry and BET method. From such results, we obtained the most suitable regeneration conditions including 650℃ of regenerating temperature, 5% of oxygen content and 10% of steam in the gas steam.
[References]
  1. Ayala RE, "Enhanced Durability of High-Temperature Desulfurization Sorbents for Moving-Bed Applications Option 2 Program: Development and Testing of Zinc Titanate Sorbents," Topical Report to DOE/METC, 7, 1992
  2. Ayala RE, Gal E, Gupta RP, "Testing of Zinc Titanate Desulfurization Sorbents for Moving-Bed Applications," Proceedings of the Coal-Fired Power Systems 93 - Advances in IGCC and PFBC Review Meeting, 136, 1993
  3. Copeland RJ, Cesario M, Feinberg D, MacQueen B, Sibold J, Windecker B, Yang J, "Long Life ZnO-TiO2 and Novel Sorbents," Proceedings of the Advanced Coal-Fired Power Systems '96 Review Meeting, Post Session B, 1996
  4. Gangwal SK, Gupta RP, "Enhanced Durability of Desulfurization Sorbents for Fluidized-Bed Applications," Proceedings of the Coal-Fired Power Systems 93 - Advances in IGCC and PFBC Review Meeting, 146, 1993
  5. Gangwal SK, Gupta RP, Cicero DC, "Bench-Scale Testing of Fluidized-Bed Sorbents-ZT4," Proceedings of the Advanced Coal-Fired Power Systems '95 Review Meeting, 229, 1995
  6. Gupta RP, Gangwal SK, "Enhanced Durability of Desulfurization Sorvents for Fluidized-Bed Applications," Topical Report to DOE/METC, 15, 1992
  7. Gupta RP, Gangwal SK, "High-Temperature, High-Pressure Testing of Zinc Titanate in a Bench-Scale Fluidized-Bed Reactor for 100 Cycles," Topical Report to DOE/METC, 18, 1993
  8. Gupta RP, Gangwal SK, Johnson EW, "Integration and Texting of Hot Desulfurization and Entrained-Flow Gasification for Power Generation Systems Volume II-Evaluation of Zinc Loss from Zinc Titanate Sorbents During Hot Gas Desulfurization," Final Report to DOE/METC, 9, 1993
  9. Khare GP, Delzer GA, Greenwood GJ, Kubicek DH, "Phillips Sorbent Development for Tempa Electric Company and Sierra Pacific Power Company," Proceedings of the Advanced Coal-Fired Power Systems '96 Review Meeting, Session 3, 1996
  10. Kim CY, Kim JJ, Cho SK, "State-of-the Art & Future Plan for Developing IGCC in Korea," Workshop of the First Integrated Coal Gasification Combined Cycle Technology, Korea Electric Power Research Institute, 55, 1996
  11. Lee TJ, Park NK, Kim JH, Kim KS, Park YW, Yi CK, HWAHAK KONGHAK, 34(4), 435, 1996
  12. Lee TJ, Park NK, Kwon WT, Chang WC, Park YS, Environ. Res., 16(1), 67, 1996
  13. Moorehead EL, Henningsen GB, "Hot Gas Desulfurization Using Transport Reactors," Proceeding of the Coal-Fired Power Systems '96 Review Meeting, Session 3, 1996
  14. Park YS, Rhee YW, Son JI, Chem. Ind. Technol., 11(5), 56, 1993
  15. Rutkowski MD, Klett MG, Zahachuk R, "Assessment of Hot Gas Contaminant Control," Proceedings of the Advanced Coal-Fired Power Systems '96 Review Meeting, Session 4a, 1996
  16. Swisher JH, Gupta RP, "Bench-Scale Testing of Attrition Resistant Moving Bed Sorbents," Proceedings of the Advanced Coal-Fired Power Systems '96 Review Meeting, Session 3, 1996