| Search / Korean Journal of Chemical Engineering |
HWAHAK KONGHAK,
Vol.33, No.6, 747-755, 1995
Vol.33, No.6, 747-755, 1995
Pd/Al2O3의 Fluorination이 CFC-113a의 수소화 반응에 미치는 영향
Effect of Fluorination over Pd/Al2O3 Catalysts on CFC-113a Hydrogenation
CFC-113a의 수소화 반응에서 Pd/Al2O3 촉매의 불소화가 촉매성능에 미치는 영향을 고찰하였다. 불소화시킨 F-Pd/Al2O3촉매의 CFC-113a 수소화 반응 전화율이 Pd/Al2O3의 전화율보다는 높게 나타났다. F-Pd/Al2O3가 Pd/Al2O3에 비해 반응 전화율이 뛰어난 이유는 XRD와 TEM으로 확인한 결과, 불소화 처리는 반응 중의 팔라듐의 응집을 방지할 수 있었으며, 팔라듐은 불소화에 의해 Pd metal과 Pd-F 결합을 형성하는 것을 XRD와 EXAFS를 통하여 관찰하였다. Pd-F는 담체와의 강한 interaction에 의해 팔라듐의 sintering을 방지하는 것으로 생각된다. 또한 담체로 사용된 γ-
Al2O3는 불소화 후에 AlF3로 바뀌고 비표면적이 감소하는 것을 확인하였다.
Al2O3는 불소화 후에 AlF3로 바뀌고 비표면적이 감소하는 것을 확인하였다.
The effect of fluorination over Pd/Al2O3 catalyst have been investigated in the hydrogenation of CFC-113a. Fluorinated Pd/Al2O3(F-Pd/Al2O3) catalysts showed higher conversion of CFC-113a than Pd/Al2O3 catalysts. Fluorinated treatment, from the characterization of used catalysts by XRD, TEM and EXAFS, prevented sintering of palladium particles during reaction and some parts of palladium formed a matallic state palladium as well as fluorinated Pd(Pd-F) upon fluorination. The Pd-F bonding suggested strong interaction with support which can decrease the sintering of Pd particles during reaction. Simultaneously, it was also confirmed that γ-Al2O3 phase changed to A1F3 and the surface area decreased after fluorination process.
[References]
- Imamura S, Catal. Soc. Jpn., 34(7), 464, 1992
- Weigold T, "Halocarbon Treatment Technology," Presented at the Global Business Outlook for CFC Alternative (Boston), June, 15, 1993
- Ministy of International Trade and Industry of Japanese Government, "Destruction Technologies of CFC's (Interim Report),", 1989
- Oku A, Kimura K, Sato M, Chem. Lett., 1789, 1988
- Donovan BA, Strand SE, Chemosphere, 24(9), 935, 1992
- Ueda W, Tomioka S, Morikawa Y, Sudo M, Ikawa T, Chem. Lett., 879, 1990
- Takita Y, Yamada H, yoshida K, Mizuhara Y, Nippon Kagaku Kaishi, 9, 1992
- Takita Y, Yamada H, Hashida M, Ishihara T, Chem. Lett., 715, 1990
- Nakamura S, Japanese R & D Trend Analysis, 143, 1993
- Takada N, Oshio H, Reprints of Symposium on 1st Freon Related Catalysts, Tsukuba, 1992
- Ohnishi R, Suzuki I, Ichikawa M, Chem. Lett., 841, 1991
- Takita Y, Yamada H, Ishihara T, Mizuhara Y, Nippon Kagaku Kaishi, 584, 1991
- Coq B, Cognion JM, Figueras F, J. Catal., 141, 21, 1993
- Fisker TR, Baugh DW, U.S. Patent, 4,147,733, 1979
- Manzer LE, Maliikarjuna VN, U.S. Patent, 4,766,260, 1988
- Hess A, Kemnitz E, Lippitz A, Unger WE, Menz DH, J. Catal., 148(1), 270, 1994
- Kodama H, Okazaki S, J. Catal., 132, 512, 1991
- Che M, Bennet C, Adv. Catal., 36, 55, 1989
- Kodama H, Okazaki S, Horie O, Nippon Kagaku Kaishi, 498, 1989
- Lonsdale K, "International Table for X-ray Crystallogaph," Vol. III, D. Reidel Pub. Co., Boston, 1983
- Davis RJ, Landary SM, Horsley JA, Boudart M, Phys. Rev., B, Condens. Matter, 39, 10580, 1989
- Lieske H, Lietz G, Spindler H, Volter J, J. Catal., 81, 8, 1983
[Cited By]
참고문헌정보(참고문헌, 인용문헌)는 화학공학소재연구정보센터에 의해 제공되고 있습니다.