HWAHAK KONGHAK, Vol.28, No.2, 237-242, April, 1990
아세틸렌 제거를 위한 티타니아 담지 팔라듐 촉매의 비활성화와 재생
Deactivation and Regeneration of Titania-supported Palladium Catalyst for Acetylene Removal from Ethylene-Rich Feed
초록
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.
- Anderson HC, Haley AJ, Egbert W, Ind. Eng. Chem., 52, 901 (1960)
- Huang W, Hydrocarbon Proc., October, 131 (1979)
- Weiss AH, Gambhir BS, Lapierre RB, Bell WK, Ind. Eng. Chem. Process Des. Dev., 16, 352 (1977)
- Wilfred WK, Llod L, Oil Gas J., 66 (1972)
- Lee DK, Ihm SK, U.S. Patent, 4,839,329 (1989)
- Bond GC, "Catalysis by Metals," p. 281-304, Academic Press, New York (1962)
- Margitfalvi J, Guczi L, Weiss AH, J. Catal., 72, 185 (1981)
- Battiston GC, Dalloro L, Tauszik GR, Appl. Catal., 2, 1 (1982)
- Sarkany A, Weiss AH, Szilagy T, Sandor P, Guczi L, Appl. Catal., 12, 373 (1984)
- Sarkany A, Guczi L, Appl. Catal., 10, 369 (1984)
- McGown WT, Kenball C, Whan DA, J. Catal., 51, 173 (1978)