Gas adsorption isotherm equation based on vacancy solution theory

Journal Article · Tue Jan 01 00:00:00 EST 1980 · AIChE J.; (United States)

DOI:https://doi.org/10.1002/aic.690260112· OSTI ID:5031977

Suwanayuen, S; Danner, R P

Pennsylvania State University's new isotherm equation for pure gas adsorption treats the adsorption equilbrium as an osmotic equilibrium between two ''vacancy'' solutions having different compositions. One solution represents the gas phase and the other the adsorbed phase. The vacancy solution is composed of adsorbates and vacancies (imaginary entities defined as the vacuum space that acts as the solvent for the system). Penn State evaluated the developed correlation against published adsorption-isotherm data for O/sub 2/, N/sub 2/, and CO on zeolite 10X and for light hydrocarbons (CH/sub 4/ to nC/sub 4/H/sub 10/) and CO/sub 2/ on Nuxit-AL activated carbon. For both adsorbents, the correlations were closer than those obtained by any other adsorption model that has been extended to gas mixtures. The new method can also represent multicomponent systems because the activity coefficient governing the nonideality of adsorbed mixtures can be readily calculated from binary parameters. These are obtained from single-component adsorption data by a procedure analogous to a bulk solution.

• OSTI ID: 5031977
• Journal Information: AIChE J.; (United States), Vol. 26
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON DIOXIDE
ADSORPTION
CARBON MONOXIDE
HYDROCARBONS
NITROGEN
OXYGEN
ACTIVATED CARBON
ADSORPTION ISOTHERMS
CORRELATIONS
MATHEMATICAL MODELS
MIXTURES
ZEOLITES
ADSORBENTS
CARBON
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DISPERSIONS
ELEMENTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTHERM
MATERIALS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SORPTION
400201* - Chemical & Physicochemical Properties
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)