Investigating process parameters, adsorption isotherm, and kinetics of indole and quinoline in single-component adsorption process from model fuel by activated carbon synthesized from green pistachio skin

Articles in Press

Document Type : Chemistry Article

Author

Iran, Urmia city, 11km SERO Road

Abstract

The aim of this research is to study the effects of various process parameters such as time (0-360 min), temperature (25-40ºC), adsorbent dose (30-60 mg), initial concentration of nitrogenous compounds indole and quinoline (100-250 ppm) present in normal-heptane fuel on the adsorption denitrification process by activated carbon produced with green pistachio skine. Pseudo-first-order and pseudo-second-order kinetic models were used to study adsorption kinetics. Also, adsorption isotherms were used to evaluate equilibrium data. All laboratory data were analyzed using a UV spectrometer after performing the adsorption test. It was found that the adsorption of nitrogenous compounds of indole and quinoline by activated carbon synthesized with pistachio green skin had the best fit with Langmuir isotherm for quinoline and indole with the highest adsorption capacity of 31.05 and 37.76 mg.g-1, respectively. Based on the experimental data, the pseudo-second order model showed the best fit for quinoline and indole with linear regression (R2) of 0.9961 and 0.9986, respectively. From the kinetic and adsorption isotherm studies of adsorption, it was confirmed that the synthesized activated carbon has a good potential for removing nitrogenous compounds.

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Journal of Modeling in Engineering

Articles in Press, Accepted Manuscript
Available Online from 16 June 2025

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History

  • Receive Date: 22 March 2024
  • Revise Date: 14 March 2025
  • Accept Date: 06 April 2025

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