Kinetic of High-Temperature Removal of $H_2S$ by Ca-based Sorbents

황화수소 제거를 위한 칼슘계 고온 탈황제의 황화반응속도

  • 김영식 (밀양대학교 환경공학과) ;
  • 전지환 (밀양대학교 환경공학과) ;
  • 손병현 (한서대학교 환경공학과) ;
  • 정종현 (서라벌대학 환경공업과) ;
  • 정덕영 (부산대학교 환경공학과) ;
  • 오광중 (부산대학교 환경공학과)
  • Published : 1999.02.01

Abstract

Sorbents of calcined limestone and oyster particles having a diameter of about 0.63mm were exposed to simulated fuel gases containing 5000ppm $H_2S$ for temperatures ranging from 600 to 80$0^{\circ}C$ in a TGA (Thermalgravimetric analyzer). The reaction between CaO and $H_2S$ proceeds via an unreacted shrinking core mechanism. The sulfidation rate is likely to be controlled primarily by countercurrent diffusion through the product layer of calcium sulfide(CaS) formed. The kinetics of the sorption of $H_2S$ by CaO is sensitive to the reaction temperature and particle size, and the reaction rate of oyster was faster than the calcined limestone.

Keywords

sulfidation kinetics;unreacted shrinking core model;hydrogen sulfide;calcium oxide;desulfurization

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