Hostname: page-component-848d4c4894-x24gv Total loading time: 0 Render date: 2024-05-09T01:17:33.730Z Has data issue: false hasContentIssue false
  • English
  • Français

Capillary Condensation of Light Hydrocarbons in MCM-41 - Type Mesoporous Materials

Published online by Cambridge University Press:  10 February 2011

M. A. Ioneva ,
R. G. Mallinson  and
J. H. Harwell
M. A. Ioneva
Affiliation:
School of Chemical Engineering, University of Oklahoma, Norman, OK 73019
R. G. Mallinson
Affiliation:
School of Chemical Engineering, University of Oklahoma, Norman, OK 73019
J. H. Harwell
Affiliation:
School of Chemical Engineering, University of Oklahoma, Norman, OK 73019
Get access

Abstract

The MCM-41 family of surfactant templated materials were used as model mesoporous sorbents for storage of light hydrocarbon vapors, by utilizing the phenomenon of capillary condensation. The experimental data show that, because of the fine tunability of MCM-41 type materials (mesopore diameter was controlled between 20 and 40 Å), the onset of capillary condensation can be controlled, and from here the point of achieving liquid-like fluid density in the pores. Such a unique characteristic makes the MCM-41 family of materials a potential media for sorptive fractionation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 454: Symposium S – Advanced Catalytic Materials–1996 , 1996 , 119
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. Davis, M. E. and Lobo, R. F., Chem. Mater. 4, 756 (1992).Google Scholar
2. Campbell, J. M., in Gas Conditioning and Processing (Campbell, Norman, 1982), vol. 4.Google Scholar
3. Due to the existence of an excess pressure [4] in a narrow capillary, condensation commences at a pressure (P) below the saturation pressure (P sat) of the bulk phase, and depends on the radius of the capillary (rm), the density (ρi) and the surface tension (Σ) of the fluid, related through the Kelvin equation [5]: In P/Psat = -2 β Σ/(ρ rm), where β = 1/(RT). For a cylindrical pore with a hemispherical meniscus, the radius of the inner core (r K) in which capillary condensation takes place is: rk = rm cos θ (θ is the contact angle).Google Scholar
4. Young, T., in Miscellaneous World, edited by Peacock, (Murray, London, 1855), vol. I, p. 418;Google Scholar
Laplace, P. S., Mecanique Celeste 10 (1806).Google Scholar
5. Thomson, W.T., Phil. Mag. 42, 448 (1871).Google Scholar
6. Sing, K. S. W., Everett, D. H., Haul, R. A. W., Moscou, L., Pierotti, R. A., Rouquerol, J., Siemieniewska, T., Pure Appl. Chem. 57, 603 (1985).Google Scholar
7. For summary of present research on MCM-41 see: Beck, J. S. and Vartuli, J. C., Current Opinion in Solid State and Materials Science 1, 76 (1996).Google Scholar
8. Ioneva, M. A., Mallinson, R. G. and Harwell, J. H., Langmuir, accepted for publication.Google Scholar
9. Starling, K. E., in Fluid Thermodynamic Properties for Light Petroleum Systems (Gulf Publishing Company, Houston).Google Scholar
10. Gregg, S. J. and Sing, K. S. W., in Adsorption, Surface Area and Porosity (Academic Press, New York, 1982), p. 93, p. 135.Google Scholar
11. Barrett, E. P., Joyner, L. G. and Halenda, P. P., J. Am. Chem. Soc. 73, 373 (1951).Google Scholar
12. Horvath, G. and Kawazoe, K., J. Chem. Eng. Japan 16, 6 (1983).Google Scholar
13. Goodman, J. F. and Walker, T., in Micellization in Aqueous Solution, edited by Everett, D. H. (The Chemical Society, London, 1978). vol. 3, p. 230.Google Scholar