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The main and vastly utilized adsorbents are listed as activated alumina, silica gel, AC, molecular sieve carbon or zeolites, and polymeric adsorbents. In general, pore size distribution in zeolitic sorbents has precise dimensions, while a plethora of adsorbents, including carbon-based materials, silica gels, and aluminas, possess unique interconnected channels and openings.
- Adsorbent
Commercially available adsorbents, including oxidized...
- Adsorbent
Adsorption is the adhesion [1] of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. [2] This process creates a film of the adsorbate on the surface of the adsorbent. This process differs from absorption, in which a fluid (the absorbate) is dissolved by or permeates a liquid or solid (the absorbent). [3]
Oct 11, 2024 · Solids that are used to adsorb gases or dissolved substances are called adsorbents; the adsorbed molecules are usually referred to collectively as the adsorbate. An example of an excellent adsorbent is the charcoal used in gas masks to remove poisons or impurities from a stream of air.
- The Editors of Encyclopaedia Britannica
Commercially available adsorbents, including oxidized multiwalled carbon nanotubes for La and Dy, 79 graphene oxide for La, Nd, Gd, and Y, 80 activated carbon for Ce, 81 and activated carbon and silica composites for Sc, 82 are some examples of materials that have shown great potential for the recovery of REMs. Although the commercially available adsorbents offer high surface area, the main ...
- Adsorption Theory
- Adsorption Systems
- Adsorption Media
- Acknowledgements
- References
- Developers
This animation exemplifies the basic process of adsorption. Material from the liquid phase is concentrated on the surface of the solid. The adsorbing phase, which is a solid in the animation above, is called the adsorbent, and the material being adsorbed at the surface of that phase is the adsorbate. Note that adsorption is different from absorptio...
Column Contact
Column contact adsorbers use a bed of adsorbent to purify solutions. The packed bed columns shown below are used in a natural gas dehydration plant.
Slurry Contact
Slurry contact adsorbers use a powdered adsorbent slurry to adsorb desired materials. Shown below are slurry contact adsorbers used in the production of hydrochloric acid.
Pressure Swing
In pressure swing adsorption (PSA), adsorbents are used under varying pressures to separate gas mixtures. The process is known as vacuum swing adsorption (VSA) if these pressures fall below atmospheric.
Adsorbents
A wide variety of adsorbents are available to carry out specific separations.
Buyers Packaging Group Ltd., Delta, B.C., Canada; part of Crown PackagingCleveland, T.G.; Garg, S., Journal of Environmental Engineering. March 1996 pp. 235-238.LaCava, A.I., Ramachandran, R., Shirley, A.I., “How To Specify Pressure-Swing Adsorption Units,” Chemical Engineering, June 1998, pp. 110-118.Koehlert, Ken. “Activated Carbon: Fundamentals and New Applications.” Chemical Engineering. July 2017: 33, 35. Print.Mantell, C. L. Adsorption. 2nd ed. New York: McGraw-Hill, Inc., 1951.Sam CatalanoJason LawrenceChris SeadeekJoseph PalazzoloNov 21, 2023 · Examples of popular adsorbents include: Alumina gel; Silica gel; Zeolites: microporous minerals; ... For example, if a previously dried red spot on a table was easily wiped away by a wet cloth, it ...
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adsorbents — for example, adsorption of hydrocarbons by activated carbon. Favorable and unfavorable isotherms are shown in Figure 2 (5). A favorable isotherm is one that has a convex shape, representing a large amount of adsorption at a low partial pressure (or for liquids, concentration). Conversely,
