황화수소를 제거한 흡착제의 산화재생반응에 대한 여러 가지 실험변수들의 영향을 살펴보기 위하여 반응조건을 변화시키면서 배출되는 가스(SO₂)를 G.C. 로 분석하였고, 이에 따른 특성을 XRD, SEM, TGA-DTA를 이용하여 분석하였다. 반응온도 750℃에서 반응성이 가장 좋음을 알 수 있었고, DTA-TGA 분석으로 소량 첨가한 Fe₂O₃ 가 중요한 역할을 함을 알 수 있었다. 산소 10vol%까지는 총 SO₂의 발생량은 비례적으로 증가하였으나 산소량이 증가할수록 급격히 감소하는 경향을 나타내었으며 총 기체유속이 증가할수록 125ml/mim까지는 총 SO₂의 발생량이 선형적으로 증가하였고 100ml/min 이사일 경우 경막 물질전달 저항을 무시할 수 있음을 알 수 있었다. 아울러 크기가 다른 흡착제를 황화반응시킨 후 다시 재생반응을 행한 결과 입자 크기가 작을수록 SO₂ 발생량이 적었고, 황화반응으로 인한 구조적 변화가 산소확산 장벽으로 작용함을 알 수 있었다. 또한 각각의 온도에서 재생된 흡착제를 650℃에서 다시 황화반응을 수행한 결과 750℃에서 재생된 흡착제가 효율적임을 알 수 있었다.

In order to examine the effects of experimental variables on the oxidative regeneration of sulfided sorbents by H₂S, effluent gas(SO₂) was analyzed by G.C.with variation of reaction conditions and oxidized sorbents were characterized by XRD, SEM, and TGA-DTA. The reactivity of oxidative regeneration was maximum at 750℃ and it was revealed that the Fe₂O₃ additive played an important role from the TGA-DTA analysis. Total SO₂ uptake was increased linearly as oxygen increased till 10vol% and it was decreased drastically as oxygen increased. When the total flow rate was increased, total SO₂ uptake was increased linearly till 125ml/min and thin-film mass transfer resistance was negligible above 100ml/min. From the oxidative regeneration of sulfided sorbents with different particle sizes, it was found that for small particle, the SO₂ uptake was little and that the structural change formed during the sulfidation acted as the O₂ diffusion barrier. From the sulfidatiion at 650℃ after one sulfidation-regeneration cycle, it was found that regenerated sorbent at 750℃ was effective.

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