A Study on Preparation and Reactivity of Zinc-based Sorbents for H2S Removal

H2S제거를 위한 아연계 탈황제 제조 및 반응특성 연구

  • Lee, Chang Min (Department of Chemical Engineering, KOREA University) ;
  • Yoon, Yea Il (Department of Chemical Engineering, KOREA University) ;
  • Kim, Sung Hyun (Department of Chemical Engineering, KOREA University)
  • Received : 1998.02.07
  • Accepted : 1999.01.09
  • Published : 1999.04.10

Abstract

Zinc-based sorbents for $H_2S$ removal were prepared. The reactivity of sorbents was investigated by the successive cycles of sulfidation-regeneration at $650^{\circ}C$ in a fixed bed reactor. The desulfurization sorbents were prepared with granulation method to produce a spherical pellet with good attrition resistance. The fresh and reacted sorbents were characterized by X-Ray Diffraction (XRD) and X-Ray Photoelectron Spectroscopy (XPS) and the characteristics of sorbents on calcination conditons were analysed by Mercury Porosimetery and BET. The reactivity of sorbents decreased as the number of sulfidation-regeneration cycle increased. It is due to the zinc loss and the increase of the diffusion resistance by sintering, cracking and spalling of sorbents at the high temperature.

Keywords

Zinc Titanate;Hydrogen Sulfide;Desulfurization;Sorbent

Acknowledgement

Supported by : 통상산업부

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