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Adsorption

, Volume 19, Issue 1, pp 101–110 | Cite as

Pure and binary adsorption isotherms of ethylene and ethane on zeolite 5A

  • Masoud Mofarahi
  • Seyyed Milad Salehi
Article

Abstract

Pure and binary adsorption equilibrium data of ethylene and ethane on zeolite 5A were collected with a volumetric method for the temperature range 283 K to 323 K and pressure up to 950 kPa. The applicability of the binary adsorption prediction by the vacancy solution theory (VST) was investigated. Further individual adsorption and selectivity were obtained by VST prediction. According to the experimental results, zeolite 5A has a high adsorption capacity and selectivity for ethylene in the ethylene/ethane system. VST predicts that ethylene selectivity increases with pressure; it also shows that the amount of ethylene separated by zeolite 5A increases as the temperature decreases at a specified pressure.

Keywords

Adsorption Zeolite 5A Ethylene/ethane separation system Vacancy solution theory 

List of symbols

AAD

Absolute average deviation

\(\overline{\alpha _{i}}\)

Partial molar surface area of i (m2/mol)

bi

Henry’s Law Constant of i (mol kg−1 kPa−1)

P

Pressure of pure gas in equilibrium with its adsorbed phase (kPa)

p

Total pressure of mixture in equilibrium with its adsorbed Phase (kPa)

\(q_{m}^{s}\)

Total number of moles of mixture in surface phase (mol/kg)

\(q_{i}^{s,\infty}\)

Maximum number of moles of i in surface phase (mol/kg)

\(q_{m}^{s,\infty}\)

Maximum total number of moles of mixture in surface phase (mol/kg)

ΔH

Isosteric heat of adsorption (kJ/mol)

R

Universal gas constant (J mol−1 K−1)

S

Selectivity

T

Temperature of adsorption system (K)

Xi

Mole fraction of i in vacancy-free adsorbed phase

\(\mathrm{X}_{i}^{s}\)

Mole fraction of i in adsorbed phase vacancy

Yi

Mole fraction of i in vacancy-free vapor phase

Greek letters

\(\gamma_{i}^{s}\)

Activity coefficient of i in adsorbed phase vacancy solution

θ

Surface coverage

Λij,Λji

Aadsorbated–adsorbated interaction parameters from Wilson Eq. (7)

Λiv,Λvi

Adsorbate–vacancy interaction parameters

π

Spreading pressure (J/m2)

Subscripts

exp

Experimental

cal

Calculated

i,j,K

Component

m

Mixture

N

Number of components

NPTS

Number of point

s

Surface phase

v

Vacancy

Value at maximum adsorption limit

Notes

Acknowledgements

The authors are thankful to Persian Gulf University research office for financial support, providing various facilities and necessary approval under contract no. 19-561.

References

  1. Al-Baghli, N.A., Loughlin, K.F.: Adsorption of methane, ethane, and ethylene on titanosilicate ETS-10 zeolite. J. Chem. Eng. Data 50, 843–848 (2005) CrossRefGoogle Scholar
  2. Al-Baghli, N.A., Loughlin, K.F.: Binary and ternary adsorption of methane, ethane, and ethylene on titanosilicate ETS-10 Zeolite. J. Chem. Eng. Data 51, 248–254 (2006) CrossRefGoogle Scholar
  3. Anson, A., Wang, Y., Lin, C.C.H., Kuznicki, T.M., Kuznicki, S.M.: Adsorption of ethane and ethylene on modified ETS-1. Chem. Eng. Sci. 63, 4171–4175 (2008) CrossRefGoogle Scholar
  4. Anson, A., Lin, C.C.H., Kuznicki, S.M.: Separation of ethylene/ethane mixtures by adsorption on small-pored titanosilicate molecular sieves. Chem. Eng. Sci. 65, 807–811 (2010) CrossRefGoogle Scholar
  5. Bal, K.K.: Correlation and prediction of adsorption isotherm data for pure and mixed gases. Ind. Eng. Chem. Process Des. Dev. 23(4), 711–716 (1984) CrossRefGoogle Scholar
  6. Bezus, A.G., Kiselev, A.V., Du, P.Q.: The influence of size, charge and concentration of exchange cations on the adsorption of ethane and ethylene by zeolites. J. Colloid Interface Sci. 40, 223–232 (1972) CrossRefGoogle Scholar
  7. Cermakova, J.R., Markovic, A., Uchytil, P., Seidel, A.: Single component and competitive adsorption of propane, carbon dioxide and butane on vycor glass. Chem. Eng. Sci. 63(6), 1586–1601 (2008) CrossRefGoogle Scholar
  8. Choudhary, V.R., Mayadevi, S.: Adsorption of methane, ethane, ethylene, and carbon dioxide on high silica pentasil zeolites and zeolite like materials using gas chromatography pulse technique. Sep. Sci. Technol. 28, 2197–2209 (1993) CrossRefGoogle Scholar
  9. Constantinides, A., Mostoufi, N.: Numerical Methods for Chemical Engineers with MATLAB Applications. Prentice Hall, Upper Saddle River (1999) Google Scholar
  10. Danner, R.P., Choi, E.C.F.: Mixture adsorption of ethane and ethylene on 13X molecular sieves. Ind. Eng. Chem. Fundam. 17, 248–253 (1978) CrossRefGoogle Scholar
  11. Grande, C.A., Gigola, C., Rodrigues, A.E.: Adsorption of propane and propylene in pellets and crystals of 5A zeolite. Ind. Eng. Chem. Res. 41, 85–92 (2002) CrossRefGoogle Scholar
  12. Li, P., Tezel, F.H.: Pure and binary adsorption equilibria of carbon dioxide and nitrogen on silicalite. J. Chem. Eng. Data 53, 2479–2487 (2008) CrossRefGoogle Scholar
  13. Mofarahi, M., Seyyedi, M.: Pure and binary sorption isotherms of nitrogen and oxygen on zeolite 5A. J. Chem. Eng. Data 54, 916–921 (2009) CrossRefGoogle Scholar
  14. Mofarahi, M., Sadrameli, M., Towfighi, J.: Four-bed vacuum pressure swing adsorption process for propylene/propane separation. Ind. Eng. Chem. Res. 44, 1557–1564 (2005) CrossRefGoogle Scholar
  15. Nakahara, T., Amagasa, G., Ogura, T.: Adsorption of binary gaseous mixture of ethylene-ethane and ethylene-propylene on a carbon molecular sieve. J. Chem. Eng. Data 29, 202–204 (1984) CrossRefGoogle Scholar
  16. Nam, G.M., Jeong, B.M., Kang, S.H., Lee, B.K., Choi, D.K.: Equilibrium isotherms of CH4, C2H6, C2H4, N2, and H2 on zeolite 5A using a static volumetric method. J. Chem. Eng. Data 50, 72–76 (2005) CrossRefGoogle Scholar
  17. Pereira, P.R., Pires, J., Brotas, M.: Zirconium pillared clays for carbon dioxide/methane separation preparation of adsorbent materials and pure gas adsorption. Langmuir 14(16), 4584–4588 (1998) CrossRefGoogle Scholar
  18. Perez, A.R., Armenta, G.A.: Adsorption kinetics and equilibria of carbon dioxide, ethylene, and ethane on 4A (CECA) zeolite. J. Chem. Eng. Data 55, 3625–3630 (2010) CrossRefGoogle Scholar
  19. Prausnitz, J.M.: Molecular Thermodynamics of Fluid-Phase Equilibria. Prentice-Hall, Englewood Cliffs (1969) Google Scholar
  20. Sang, H.H., Danner, R.P.: Equilibrium adsorption of ethane, ethylene, isobutane, carbon dioxide, and their binary mixtures on 13X molecular sieves. J. Chem. Eng. Data 27, 2 (1982) Google Scholar
  21. Shi, M., Christopher, C.H.L., Tetyana, M.K., Zaher, H., Steven, M.K.: Separation of a binary mixture of ethylene and ethane by adsorption on Na-ETS-10. Chem. Eng. Sci. 65, 3494–3498 (2010) CrossRefGoogle Scholar
  22. Shi, M., Avila, A.M., Yang, F., Kuznicki, T.M., Kuznicki, S.M.: High pressure adsorptive separation of ethylene and ethane on Na-ETS-10. Chem. Eng. Sci. 66, 2817–2822 (2011) CrossRefGoogle Scholar
  23. Suwanayuen, S., Danner, R.P.: A gas adsorption isotherm equation based on vacancy solution theory. AIChE J. 26, 68–75 (1980a) CrossRefGoogle Scholar
  24. Suwanayuen, S., Danner, R.P.: Vacancy solution theory of adsorption from gas mixtures. AIChE J. 26, 76–82 (1980b) CrossRefGoogle Scholar
  25. Talu, O.: Needs, status, techniques and problems with binary gas adsorption experiments. Adv. Colloid Interface Sci. 76–77, 227–269 (1998) CrossRefGoogle Scholar
  26. Talu, O., Li, J., Kumar, R., Mathias, P., Moyer, J.D., Schork, J.M.: Measurement and analysis of oxygen/nitrogen 5A-zeolite adsorption equilibria for air separation. Gas Sep. Purif. 10(3), 149–159 (1996) CrossRefGoogle Scholar
  27. Triebe, R.W., Tezel, F.H., Khulbe, K.C.: Adsorption of methane, ethane and ethylene on molecular sieve zeolites. Gas Sep. Purif. 10, 81–84 (1996) CrossRefGoogle Scholar
  28. Yang, R.T.: Gas Separation by Adsorption Processes. Butterworths, Boston (1986) Google Scholar

Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.Chemical Engineering DepartmentPersian Gulf UniversityBushehrIran

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