Abstract
Advanced zinc-based sorbents, ZA, for Hot Gas Desulfurization (HGD) process in Integrated Gasification Combined Cycle (IGCC) systems were formulated with $Al_2$O$_3$ as support to enhance the reactivity and their reactive characteristics was also investigated in this study. Changes in the physical and chemical properties of the sorbents based on both the mole ratios of ZnO/Al$_2$O$_3$ and the calcination temperatures were examined by a XRD. The results obtained in our desulfurization-regeneration cycle tests demonstrated that degradation of sorbents due to the heat generation could be improved through the optimization of the $Al_2$O$_3$ contents and of the calcination temperatures. From the durability study it is concluded that the prepared ZA sorbents with additives have the desirable features for HGD.
석탄가스화 복합발전용 고온건식 탈황제의 반응성을 개선하기 위하여 $Al_2$O$_3$를 지지체로사용한 ZnO/Al$_2$O$_3$ 탈황제를 제조하고 반응특성을 조사하였다. ZnO/Al$_2$O$_3$의 성분함량 및 소성온도에 따른 물리화학적 구조변화를 XRD로 관찰하였고 ZnO의 소결 및 열화로 인한 활성저하를 $Al_2$O$_3$의 함량과 소성온도를 변화시켜 개선할 수 있음을 탈황 및 재생반응실험을 통하여 확인하였다. 마지막으로 첨가제를 함유한 ZnO/Al$_2$O$_3$ 탈황제의 내구성실험에 의한 고온건식 탈황제로의 사용가능성을 실험적으로 확인하였다.