Pd/Al<SUB>2</SUB>O<SUB>3</SUB>의 Fluorination이 CFC-113a의 수소화 반응에 미치는 영향

김광수; 양재춘; 안병성; 설용건

HWAHAK KONGHAK, Vol.33, No.6, 747-755, December, 1995

Export Citation

Pd/Al₂O₃의 Fluorination이 CFC-113a의 수소화 반응에 미치는 영향

Effect of Fluorination over Pd/Al₂O₃ Catalysts on CFC-113a Hydrogenation

김광수, 양재춘, 안병성, 설용건

초록

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.

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)

[Referenced By]

[1] Imamura S, Catal. Soc. Jpn., 34(7), 464 (1992)

[2] Weigold T, "Halocarbon Treatment Technology," Presented at the Global Business Outlook for CFC Alternative (Boston), June, 15 (1993)

[3] Ministy of International Trade and Industry of Japanese Government, "Destruction Technologies of CFC's (Interim Report)," (1989)

[4] Oku A, Kimura K, Sato M, Chem. Lett., 1789 (1988)

[5] Donovan BA, Strand SE, Chemosphere, 24(9), 935 (1992)

[6] Ueda W, Tomioka S, Morikawa Y, Sudo M, Ikawa T, Chem. Lett., 879 (1990)

[7] Takita Y, Yamada H, yoshida K, Mizuhara Y, Nippon Kagaku Kaishi, 9 (1992)

[8] Takita Y, Yamada H, Hashida M, Ishihara T, Chem. Lett., 715 (1990)

[9] Nakamura S, Japanese R & D Trend Analysis, 143 (1993)

[10] Takada N, Oshio H, Reprints of Symposium on 1st Freon Related Catalysts, Tsukuba (1992)

[11] Ohnishi R, Suzuki I, Ichikawa M, Chem. Lett., 841 (1991)

[12] Takita Y, Yamada H, Ishihara T, Mizuhara Y, Nippon Kagaku Kaishi, 584 (1991)

[13] Coq B, Cognion JM, Figueras F, J. Catal., 141, 21 (1993)

[14] Fisker TR, Baugh DW, U.S. Patent, 4,147,733 (1979)

[15] Manzer LE, Maliikarjuna VN, U.S. Patent, 4,766,260 (1988)

[16] Hess A, Kemnitz E, Lippitz A, Unger WE, Menz DH, J. Catal., 148(1), 270 (1994)

[17] Kodama H, Okazaki S, J. Catal., 132, 512 (1991)

[18] Che M, Bennet C, Adv. Catal., 36, 55 (1989)

[19] Kodama H, Okazaki S, Horie O, Nippon Kagaku Kaishi, 498 (1989)

[20] Lonsdale K, "International Table for X-ray Crystallogaph," Vol. III, D. Reidel Pub. Co., Boston (1983)

[21] Davis RJ, Landary SM, Horsley JA, Boudart M, Phys. Rev., B, Condens. Matter, 39, 10580 (1989)

[22] Lieske H, Lietz G, Spindler H, Volter J, J. Catal., 81, 8 (1983)