Abstract
Experiments were conducted for the hydrogenolysis of CFC-12 (CCl2F2) to CH2F2 over bimetallic palladium catalysts (Pd-Bi, Pd-Ru) supported on activated carbon. The characteristics of the bimetallic palladium catalysts were examined with ICP, XRD, TPD, TEM, and N2 physisorption/H2 chemisorption and the Pd-F formation was identified by XPS analysis. The catalytic activity of the bimetallic palladium catalyst (Pd-Bi/C, or Pd-Ru/C) was superior to that of the monometallic palladium catalyst. The bimetallic palladium catalysts showed much higher conversion rates (more than 99% of it was converted) than did the monometallic palladium catalyst (< 92%) and were deactivated to a lesser extent, even at high temperatures (>320 ‡C). The bimetallic components maintained the good dispersion of the Pd on the activated carbon support.
Similar content being viewed by others
References
Albers, P., Deller, K., Despeyroux, B. M., Schafer, A. and Seibold, K, “XPS-SIMS Study on the Surface Chemistry of Commercially Available Activated Carbons Used Monoxide with Palladium,”J. Catal,133,467 (1992).
Benson, J. E., Hwang, H. S. and Boudart, M., “Hydrogen-Oxgen Titration Method for the Measurement of Supported Palladium Surface Area,”J. Catal.,30,146 (1973).
Bonzel, H. P. and Krebs, H. J., “On the Chemical Nature of the Carbonaceous Deposits on Iron after co Hydrogenation”Surf. Sci.,91,499 (1980).
Coq, B., Cognion, J. M., Figueras, F. and Tournighant, D., “Conversion under Hydrogen of Dichlorodifluoromethane over Supported Palladium Catalysts,”J. Catal.,141, 21 (1993).
Coq, B., Figueras, F, Hub, S. and Tournigant, D., “Effect of the Metalsupport Interaction on the Catalytic Properties of Palladium for the Conversion of Difluorodichloromethane with Hydrogen: Comparison of Oxide and Fluorides as Supports,”J. Phys. Chem.,99,11159 (1995).
Coq, B., Hub, S., Figueras, F. and Tournigant, D., “Conversion under Hydrogen of Dichlorodifluoromethane over Bimetallic Palladium Catalysts,”Appl. Catal. A: General,101,41 (1993).
Han, K. Y, Seo, K. W., Mok, Y. I., Park, K. Y. and Ahn, B. S, “Dechlorination of HCFC142b over Supported Pd Catalysts and Solid Acid Catalysts,”J. of Korean Ind. Eng. Chem.,9, 322 (1998).
Jeon, S. G., Shul, Y G., Lee, H. J. and Ahn, B. S., “Hydrodechlorination of CFC-12 over Fluorinated Pd/Al2O3 Catalyst,”HWAHAK KONGHAK,37,103 (1999).
Kim, D.-W., Dm, S.-K., Park, K.-Y. and Lee, B.-G, “Hydrogenation of CFC-114a over Palladium Catalysts,”HWAHAK KONGHAK,31, 831 (1993).
Kim, K. S, Yang, J. C, Ahn, B. S. and Shul, Y G., “Effect of Fluorination over Pd/Al2O3 Catalysts on CFC-113a Hydrogenation,”HWAHAK KONGHAK,33, 747 (1995).
Lee, K. H, Seo, K. W, Mok, Y I., Park, K. Y. and Ahn, B. S, “Hydrogenolysis of HCFC-142b over Supported Palladium Catalyst,”J. Ind. Eng. Chem.,6, 305 (2000).
Malinowski, A., Juszczyk, W., Bonarowska, M., Pielaszek, J. and Karpinski, Z., “Palladium Black as Model Catalyst in the Hydrogenolysis of CC12F2 (CFC-12) into CH2F2 (HFC-32),”Appl. Catal. A: General,155, 55 (1997).
Molina, M. J. and Rowland, F S., “Stratospheric Sink for Chlorofluoromethanes: Chlorine Atomic-Analyzed Destruction of Ozone,”Nature,249, 810(1974).
Park, Y.-H, Moon, D. J., Ahn, B. S. and Park, K. Y, “Catalytic Hydrogenolysis of CFC-12 (CCl2F2) over Pd Catalyst Supported on Activated Carbon Treated with Alkali and Acid”HWAHAK KONGHAK,38, 585 (2000).
Shim, G I., Yoon, K. I, Kim, H. S. and Park, K. Y, “Test of Some Chlorides and Activated Carbons as Catalysts for Chlorination of HCFC-133a,”Korean J. Chem. Eng.,12,494 (1995).
Shin, E. W., Cho, S. I., Kang, J. H., Kim, W. J., Park, J. D. and Moon, S.H.,“Palladium-Hydrogen Interaction on Supported Palladium Catalyst of Different Metal Dispersions,”Korean J. Chem. Eng.,17, 468 (2000).
Stachurski, J. and Frackiewicz, A., “A New Phase in the Pd-C System Formed during the Catalytic Hydrogen of Acetylene,”J. Less-Common Metals,108, 249 (1985).
Tnag, S., Lin, J. and Tan, K. L., “Characterization and Reactivity of α- Al2O3-Supported Pt-Co Bimetallic Catalysts,”Surf. Interface Anal,28,155 (1999).
van de Sandt, E. J. A. X., Wiersma, A., Makkee, M., van Bekkum, H. and Moulijn, J. A., “Catalyst Development for the Selective Hydrogenolysis of CC12F2 (CFC-12) into CH2F2 (HFC-32),”Catal. Today,35,163 (1997).
Wiersma, A., van de Sandt, E. J. A. X., Marion A. den Hollander, M. A., ven Bekkum, H., Makkee, M. and Moulijin, J. A., “Comparison of the Performance of Activated Carbon-Supported Noble Metal Catalysts in the Hydrogenolysis of CC12F2,”J. Catal,177, 29 (1998).
Ziemecki, S. B., Jones, G A., Swartzfager, D. G. and Halow, R L., “Formation of Interstitial Pd-C Phase by Interaction of Ethylene, Acetylene, and Carbon Monoxide with Palladium,”J. Am. Chem. Soc,107, 4547 (1985).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Song, J.H., Seo, K.W., Mok, Y.I. et al. Catalytic hydrogenolysis of CFC-12 (CC12F2) over bimetallic palladium catalysts supported on activated carbon. Korean J. Chem. Eng. 19, 246–251 (2002). https://doi.org/10.1007/BF02698409
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02698409