Abstract
Equilibria data for the adsorption of oxygen nitrogen and their binary mixtures were determined on 5A molecular sieve beads The single species isotherm data were approximated bv the Freundlich type isotherm in a piecewise manner.
The binary equilibria were presented at the pressure of 1.5 atm abs and the three temperatures: 273, 283 and 293 K. The binary data were examined for values predicted by the ideal adsorbed solution theory using the piecewise Freundlich isotherms obtained from the single species isotherm data.
Predicted equilibria data showed a good agreement with experimental values.
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Abbreviations
- A:
-
specific surface area of adsorbent, m2/gr
- B:
-
defined as A/RT
- C:
-
constant depending on the equilibrium pressure
- D:
-
constant depending on the equilibrium pressure
- K:
-
coefficient in Freundlich isotherm, mole/kg (atm abs)x
- nℴ:
-
number of moles of pure component in adsorbed phase per unit mass of adsorbent, mole/kg
- nl :
-
total number of moles in adsorbed phase per unit mass of adsorbent, mole/kg
- P:
-
total pressure, atm abs
- Pℴ:
-
pressure of pure component
- Pℴ(gp):
-
equilibrium pressure for pure component corresponding to spreading pressure π
- R:
-
gas constant
- T:
-
absolute temperature
- X:
-
coefficient in Freundlich isotherm
- x:
-
mole fraction in adsorbed phase
- y:
-
mole fraction in gas phase
- Z:
-
constant depending on the equilibrium pressure
- π:
-
spreading pressure, joule/m2
- l:
-
component
- J:
-
component
- m:
-
number of segments for the Freundlich isotherm
- n:
-
iteration
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Moon, IS., Lee, DI. The prediction of adsorption equiliria for oxygen and nitrogen gas mixtures on 5a molecular sieves by ideal adsorbed solution theory(IAST). Korean J. Chem. Eng. 3, 107–112 (1986). https://doi.org/10.1007/BF02705021
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DOI: https://doi.org/10.1007/BF02705021