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Physical Adsorption of H2S Related to the Conservation of Works of Art: The Role of the Pore Structure at Low Relative Pressure
- Source :
- Adsorption. 11:569-576
- Publication Year :
- 2005
- Publisher :
- Springer Science and Business Media LLC, 2005.
-
Abstract
- The adsorption isotherms of H2S in selected adsorbents were determined at 298 K, at relative pressures up to about 0.005, aiming the use of these materials in the removal of that pollutant from the museums atmosphere. The Dubinin-Astakhov equation adjusts very well the experimental results, although one cannot interpret the pre-exponential factor w0 as the limiting adsorbed amount. The parameter E, related with the adsorption energy, and the parameter n, that can be associated with the surface heterogeneity of the adsorbents, are correlated and the first is also correlated with the adsorbed amounts. It was not found any expectable relationship between the adsorbed amounts and textural parameters of the adsorbents such as the specific surface area or the microporous volume. This points out that the adsorption of H2S is highly specific. In general, 13X and Y sodium zeolites seem to be the most effective adsorbents, but at lowest tested pressures, near the concentrations found at museums, a pillared clay prepared from a Wyoming montmorillonite seems to be more efficient.
- Subjects :
- Chemistry
General Chemical Engineering
Hydrogen sulfide
Mineralogy
Surfaces and Interfaces
General Chemistry
Microporous material
chemistry.chemical_compound
Adsorption
Montmorillonite
Chemical engineering
Volume (thermodynamics)
Specific surface area
medicine
Zeolite
Activated carbon
medicine.drug
Subjects
Details
- ISSN :
- 15728757 and 09295607
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Adsorption
- Accession number :
- edsair.doi...........b5504f116abc4291ecf1e462c5eaf2ac