Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-29T09:30:43.760Z Has data issue: false hasContentIssue false
  • English
  • Français

Effective Diffusivity of Carbon Dioxide and Iodine through “G” Tunnel Tuff

Published online by Cambridge University Press:  21 February 2011

Tevfik Bardakci ,
Franklin G. King  and
Maung K. Sein
Tevfik Bardakci
Affiliation:
North Carolina A&T State University, Department of Chemical Engineering, Greensboro, N.C. 27411
Franklin G. King
Affiliation:
North Carolina A&T State University, Department of Chemical Engineering, Greensboro, N.C. 27411
Maung K. Sein
Affiliation:
North Carolina A&T State University, Department of Chemical Engineering, Greensboro, N.C. 27411
Get access

Abstract

The effective diffusivity of carbon dioxide and iodine through “G” tunnel tuff were determined using a steady-state method and an unsteady-state method respectively. Results show that the effective diffusivity of carbon dioxide and iodine through dry tuff increased with temperature. The effective diffusivity of carbon dioxide decreased as the moisture content of the “G” tunnel tuff increased. An emprical correlation was obtained to estimate the effective diffusivity of carbon dioxide as a function temperature and the percent saturation. Specific surface area and pore volume of tuff was determined using a mercury porosimeter. A scanning electron microscope was utilized to further characterize the porous structure of the tuff samples.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 176: Symposium U – Scientific Basis for Nuclear Waste Management XIII , 1989 , 751
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Van Konynenburg, R.A., Smith, C.F., Culman, H.W., and Otto, C.H. Jr, “Behavior of 14C in Waste Packages for Spent Fuel in a Repository Tuff”, in Scientific Basis for Nuclear Waste Management, VIII. Jantzen, C.M., Stone, J.A., Ewing, R.C., eds., Materials Research Society, Pittsburgh, PA., (1985).Google Scholar
2. Thomas, T.R., and Brown, R.A., in Proc. of the 18th D.O.E. Nuclearnt and Air Cleaning Conference, Baltimore, MD, August 12-16, 1984, ed. First, M.W., CONF-840806 (U.S. Dept. of Energy, Washington, D.C.) 1, 998 (1985).Google Scholar
3. Morgan, M.T., Moore, J.G., Devaney, H.E., Rogers, G.C., Williams, C. and Newman, E.. “The Disposal of Iodine-129”, in Scientific Basis for Nuclear Waste Management I, McCarthy, G.J., ed., Plenum Press, New York, (1978).Google Scholar
4. Wicke, E., and Kallenbach, R., Counter Diffusion Through Porous Pellet., Kolloid Z., 97, 135 (1941).Google Scholar
5. Bardakci, T., and Gasner, L.L.. “Experimental Studies Using a Single Pellet High Temperature Diffusion Cell Reactor”. Thermochimica Acta, 45, 233 (1981).Google Scholar
6. Wang, C., and Smith, J.M., “Tortuosity Factors for Diffusion in Catalyst Pellets”, AIChE Journal, 29, 132(1983)Google Scholar
7. Dogu, G., and Smith, J.M. “A Dynamic Method for Catalyst Diffusivities”, AIChE Journal, 21, 58(1975).Google Scholar
8. Smith, J.M. Chemical Engineering Kinetics, Third edition, McGraw-Hill Book Co., New York, 1981.Google Scholar
9. Evans, R.B., Watson, G.M., and Mason, E.A., “Gaseous Diffusion in Porous Media at Uniform Pressure”, J. of Chem. Phvs., 35, 2076 (1961).Google Scholar