아연-티타늄 복합금속산화물 탈황제를 제조하여 석탄가스중의 H₂S를 제거하는 고온탈황성능을 연구하였다. H₂S 흡수에 의한 탈황제의 황화반응실험을 충전충 관형 흐름반응기를 사용하여 550∼750℃ 범위에서 수행한 결과 탈황율과 아연성분의 손실측면에서 650℃가 최적 황화반응 온도임이 밝혀졌다. SEM 분석에 의해서 650℃에서의 황화반응과 750℃에서의 재생반응에 따른 탈황제 입자의 구조변화를 관찰하였다. 탈황성능의 지속성과 탈황제 내구성을 평가하기 위하여 연속적인 황화-재생 cycle 반응실험을 수행하였으며 10번째 cycle 이후에 수거한 탈황제 시료의 특성을 BET, XRD, SEM/EDX에 의해서 분석하였다. 아연-티타늄 복합 산화물 탈황제는 연속적인 황화-재생 cycle 동안에 거의 일정한 탈황성능을 나타내었다.

Zinc titanate sorbents for H₂S removal were prepared and their reactivities were studied for high temperature desulfurization of coal gas. Sulfidation of zinc titanates by H₂S sorption was conducted in a packed-bed tubular flow reactor at the temperature range of 550∼750℃, and the results reveal that 650℃ 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 sorbents sulfided at 650℃ and subsequently regenerated at 750℃. 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.