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아세틸렌 제거를 위한 티타니아 담지 팔라듐 촉매의 비활성화와 재생
Deactivation and Regeneration of Titania-supported Palladium Catalyst for Acetylene Removal from Ethylene-Rich Feed
HWAHAK KONGHAK, April 1990, 28(2), 237-242(6), NONE
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Abstract
아세틸렌 제거용 티타니아 담지 팔라듐 촉매에 green-oil 이 누적되는 속도를 중량분석에 의해 측정하였으며, green-oil이 누적된 촉매의 재생에 따른 반응활성 및 선택성의 변화를 관찰하였다. 반응온도, 아세틸렌의 농도, 수소와 아세틸린 비의 증가는 green-oil의 누적속도를 감소시켰으나, 일산화탄소의 첨가에 의해 누적속도는 증가하였다. 누적된 green-oil의 휘발성 성분은 50-80℃에서 분해되었으며, 비휘발성 성분은 300-400℃에서 분해하였다. 촉매를 공기로 재생할 경우 재생온도에 관계없이 원래의 활성 및 선택성을 회복할 수 있었다.
The accumulation rates of green-oil on the titania-supported palladium catalyst for acetylene removal from ethylene-rich feed were measured through gravimetric analysis, and the changes in activity and selectivity were investigated before and after regeneration. Green-oil accumulation rates decreased with increasing reaction tempera-ture, acetylene concentration and hydrogen to acetylene ratio, while the addition of small amounts CO enhanced the accumulation rate greatly. Volatile and non-volatile fraction of green-oil decomposed at 50-80℃ and 300-400℃, re-spectively, and after regeneration by air the deactivated calalysts restored most activity and selectivity of the fresh ones irrespective of regeneration temperature.
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