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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
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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

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References

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