Hostname: page-component-7bb8b95d7b-495rp Total loading time: 0 Render date: 2024-09-27T22:41:53.191Z Has data issue: false hasContentIssue false
  • English
  • Français

Gas Transport in Sol-Gel Derived Porous Carbon Aerogels

Published online by Cambridge University Press:  10 February 2011

G. Reichenauer  and
J. Fricke
G. Reichenauer
Affiliation:
Physikalisches Institut der Universität Würzburg, Am Hubland, D-97074Würzburg, Germany, reichenauer@physik.uni.wuerzburg.de
J. Fricke
Affiliation:
Physikalisches Institut der Universität Würzburg, Am Hubland, D-97074Würzburg, Germany, reichenauer@physik.uni.wuerzburg.de
Get access

Abstract

Due to their high electrical conductivity, their large specific surface area and their high porosity sol-gel derived nanoporous carbons are promising materials for electrodes, e.g. in water desalination systems or fuel cells. In order to optimize their properties with respect to these applications information is needed about transient and steady state transport through the interconnected pores.

Dynamic gas expansion and time resolved permeation measurements allow to determine the relevantquantities, i.e. the permeability, the ratio of gas phase to surface diffusion and the volume of dead end pores along with the tortuosity.

Experimental data on nanoporous carbons of different density are presented. All samples investigated were prepared via pyrolysis of resorcinol formaldehyde aerogels. The measurements were performed with different gases below 0.1 MPa.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 464: Symposium FF – Dynamics in Small Confining Systems III , 1996 , 345
Copyright
Copyright © Materials Research Society 1997

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. Kaschmitter, J.L., Mayer, S.T., Pekala, R.W., Supercapacitors Based on Carbon Foam. U.S. Patent No. 5 260 855 (November 1993).Google Scholar
2. Frankel, C., The Environment. IEEE Spectrum, p.76 (January 1996).Google Scholar
3. Shi, H., Electrochimica Acta 41, p. 1633 (1996).Google Scholar
4. Kong, F.M., Le May, J.D., Hulsey, S.S., Alviso, C.T. and Pekala, R.W., J. Mater. Res. 8, p. 3100 (1993).Google Scholar
5. Reichenauer, G., Stumpf, C., Fricke, J., J. Non-Cryst. Solids, 186, p. 334 (1995).Google Scholar
6. Smith, R.K., Metzner, A.B., J. Phys. Chem. 68, p. 2741 (1964).Google Scholar
7. Sladek, K.J., Gilliland, E.R., Baddour, R.F., Ind. Eng. Chem. Fundam. 13, p. 100 (1974).Google Scholar
8. Haul, R., Stremming, H. in Characterization of Porous Solids, edited by Unger, K.K., Rouquerol, J., Sing, K.S.W. and Kral, H. (Elsevier Publishers B.V., Amsterdam, 1988), p. 367.Google Scholar
9. Satoh, S., Matsuyama, I., Susa, K., J. Non-Cryst. Solids 190, p.206 (1995).Google Scholar
10. Vieth, W.R., Diffusion In and Through Polymers (Hanser Publishers, 1979), p.20.Google Scholar
11. Stumpf, C., Gässler, K.v., Reichenauer, G. and Fricke, J., J. Non-Cryst. Solids 145, p. 180 (1992).Google Scholar