Adsorptive Desulfurization of Model Oil by Ag nanoparticles-modified Eichhornia crassipes: Equilibrium, Kinetics, and Thermodynamic Studies

Document Type : Original Article

Authors

1 Department of Chemistry, College of Science, Mustansiriyah University, Baghdad-Iraq

2 Al-Turath University College , Baghdad , Iraq

3 Analysis Management Section, Petroleum R &D Center, Baghdad, Iraq.

Abstract

The use of Ag Nano Composite for desulfurization of model oil has been examined in this work. Silver nanoparticles was chosen for sorbent modification because of its high activity, chemical and Physical properties of as-synthesized adsorbent were investigated by (Scanning Electron Microscopy) SEM, (X-Ray Diffraction) XRD, (Brunauer–Emmett– Teller) BET method and (Fourier Transform Infrared spectroscopy) FTIR, Adsorptive desulfurization of model fuel was studied through batch processes , Surface area 129.37 m2g-1, total pore volume 0.0072 cm3g-1, and average pore diameter 11.952 nm are the textural parameters. Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherms were used to describe equilibrium adsorption at various temperatures, with the Langmuir isotherm agreeing with the experimental equilibrium results. Pseudo-first-order, pseudo-second-order, intraparticle diffusion, and Elovich kinetic models are all investigated. The pseudo-second order model was found to be the best fit for the adsorption equilibrium and defining the kinetics. Finally, at various temperatures, the thermodynamic functions of adsorption reactions were estimated. The results showed that the adsorption process was spontaneous because the free energy (ΔG) was negative, and the reaction was exothermic and had kinetic energy (randomness) since the free energy (ΔG) was positive.

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Egyptian Journal of Chemistry
Volume 65, Issue 131 - Serial Number 13
Special Issue: Chemistry and Global Challenges (Part A)
December 2022
Pages 345-360

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History

  • Receive Date: 30 January 2022
  • Revise Date: 01 May 2022
  • Accept Date: 15 May 2022

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