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Application of Heterogeneous Vacancy Solution Theory to Characterization of Microporous Solids by L.P. Ding; S.K. Bhatia is a Materials Science article available to read on EtoBox.
What is Application of Heterogeneous Vacancy Solution Theory to Characterization of Microporous Solids about?
The vacancy solution theory of adsorption is re-formulated here through the mass-action law, and placed in a convenient framework permitting the development of thermodynamically consistent isotherms. It is shown that both the multisite Langmuir model and the classical vacancy solution theory expression are special cases of the more general approach when the Flory-Huggins activity coefficient model is used, with the former being the thermodynamically consistent result. The improved vacancy solution theory approach is further extended here to heterogeneous adsorbents by considering the pore-width dependent potential along with a pore size distribution. However, application of the model to numerous hydrocarbons as well as other adsorptives on microporous activated carbons shows that the multisite model has difficulty in the presence of a pore size distribution, because pores of different sizes can have different numbers of adsorbed layers and therefore different site occupancies. On the other hand, use of the classical vacancy solution theory expression for the local isotherm leads to good simultaneous fit of the data, while yielding a site diameter of about 0.257 nm, consistent with
Who reads Application of Heterogeneous Vacancy Solution Theory to Characterization of Microporous Solids?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- L.P. Ding; S.K. Bhatia
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0008-6223)
- Published
- 2001
- Language
- EN
- Field
- Materials Science (Physical Sciences)