Abstract
The amount of deposited carbon on activated carbons was adjusted by varying the space time and the time on stream. Carbon nuclei formation appeared to occur initially but was terminated soon and then the carbon crystallite growth became dominant. The methane decomposition rate over activated carbons had a nearly linear relationship with the amount of carbon deposited. This suggests that the carbon deposition occurs uniformly and the activity decreases due to pore blocking, resulting in loss of accessibility to the active sites. The rate was also nearly proportional to the surface area for the same kind of activated carbon, which is contrasted with the previous finding that no discernible trend was observed between the initial activity and the surface area among different kinds of the activated carbons.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Aiello, R., Fiscus, J. E., zur Loye, H.-C, Amiridis, M. D., “Hydrogen Production via the Direct Cracking of Methane over Ni/SiO2: Catalyst Deactivation and Regeneration”,Appl. Catal. A,192, 227 (2000).
Baker, R. T. K., “In situ Electron Microscopy Studies of Catalyst Particle Behavior”,Catal. Rev.-Sci. Eng.,19, 161 (1979).
Boudart, M. and Djega-Mariadassou, G., “Kinetics of Heterogeneous Catalytic Reactions”, Princeton University Press, Princeton, NJ, Chap. 5 (1984).
Franck, J.-P. and Martino, G. P., “Deactivation of Reforming Catalysts”, Deactivation and Poisoning of Catalysts, Oudar, J. and Wise, H, eds., Marcel Dekker, New York, 205 (1985).
Fulcheri, L. and Schwob, Y., “From Methane to Hydrogen, Carbon Black and Water”,Int. J. Hydrogen Energy,20, 197 (1995).
Gaudernack, B. and Lynum, S., “Hydrogen from Natural Gas Without Release of CO2 to the Atmosphere”,Int. J. Hydrogen Energy,23, 1087 (1998).
Hegedus, L. L. and McCabe, R. W., “Catalyst Poisoning”, Marcel Dekker, New York, 47 (1984).
Jun, J. H., Lee, S. J., Lee, S.-H., Lee, T.-J., Kong, S. J., Lim, T. H., Nam, S.-W, Hong, S.-A. and Yoon, K. J., “Characterization of a Nickel-Strontium Phosphate Catalyst for Partial Oxidation of Methane”,Korean J. Chem. Eng.,20(5), 829 (2003).
Kim, M. H., Lee, E. K., Jun, J. H., Kong, S. J., Han, G. Y, Lee, B. K., Lee, T.-J. and Yoon, K. J., “Hydrogen Production by Catalytic Decomposition of Methane over Activated Carbons: Kinetic Study”,Int. J. Hydrogen Energy, in press (2003).
Kim, M. H., M.S. Thesis, Sungkyunkwan University (2003).
Liu, Z.-W., Roh, H.-S., Jun, K.-W., Park, S.-E. and Song, T.-Y., “Tartial Oxidation of Methane over Ni/Ce-ZrO2/θ-Al2O3”,Korean J. Chem. Eng.,19, 742 (2002).
Muradov, N., “Catalysis of Methane Decomposition over Elemental Carbon”,Catal. Commun.,2, 89 (2001b).
Muradov, N., “Hydrogen via Methane Decomposition: an Application for Decarbonization of Fossil Fuels”,Int. J. Hydrogen Energy,26, 1165 (2001a).
Muradov, N. Z., “How to Produce Hydrogen from Fossil Fuels Without CO2 Emission”,Int. J. Hydrogen Energy,18, 211 (1993).
Naccache, C., “Deactivation of Acid Catalysts”, Deactivation and Poisoning of Catalysts, Oudar, J. and Wise, H., eds., Marcel Dekker, New York, 185 (1985).
Steinberg, M. and Cheng, H. C., “Modern and Prospective Technologies for Hydrogen Production from Fossil Fuels”,Int. J. Hydrogen Energy,14, 797 (1989).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kim, M.H., Lee, E.K., Jun, J.H. et al. Hydrogen production by catalytic decomposition of methane over activated carbons: Deactivation study. Korean J. Chem. Eng. 20, 835–839 (2003). https://doi.org/10.1007/BF02697284
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02697284