| 학회 |
한국화학공학회 |
| 학술대회 |
2003년 봄 (04/25 ~ 04/26, 순천대학교) |
| 권호 |
9권 1호, p.1217 |
| 발표분야 |
촉매/반응공학 |
| 제목 |
Pyrolysis of R-22(monochlorodifluoromethane) over metal fluoride based catalysts |
| 초록 |
Monochlorodifluoromethane (CHClF2, R-22 or HCFC-22) has been used as a raw material for the manufacture of valuable fluorinated compounds such as tetrafluoroethylene (C2F4, TFE) and hexafluoropyropylene (C3F6, HFP). However, R-22 is a controlled substance under the Montreal protocol because of stratospheric ozone depletion potential. It has to be phased out by 2030 in developed countries. TFE has been prepared by the non-catalytic pyrolysis of R-22 at temperature ranges of 750-950℃. In this work, we tried to find an effective catalyst and investigated the catalytic pyrolysis of R-22 over fluorinated metal oxides and metal fluorides. We also compared the catalyzed pyrolysis of R-22 with the non-catalytic pyrolysis. In the pyrolysis of R-22 over Al2O3 catalyst, the transformation of aluminum oxide to aluminum fluoride by the attack of HF produced during the pyrolysis was observed. And the alteration of reactivity as a function of time was also observed. In order to draw a correlation between the catalytic activity and the surface structure in the metal fluoride based catalysts, AlF3 and CaF2 catalysts were introduced in the pyrolysis of R-22 and their effects were studied. |
| 저자 |
성대진1, 김준호1, 정정조2, 문동주2, 이용준3, 홍석인1
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| 소속 |
1고려대, 2한국과학기술(연), 3대영화학(주) |
| 키워드 |
pyrolysis; R22; catalyst; metal fluoride
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| E-Mail |
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