TiO2 Loading on Activated Carbon: Preparation, Characterization, Desulfurization Performance and Isotherm of the Adsorption of Dibenzothiophene from Model Fuel

Document Type : Original Article

Authors

Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

Abstract

Deep desulfurization of petroleum fuels is an essential requirement to reduce the negative effects of sulfur compounds on the environment and the refining process. Titanium dioxide loading on activated carbon nanoparticles was successfully prepared with two different TiO2 proportions and introduced as an adsorbent for deep adsorptive desulfurization of dibenzothiophene (DBT) from model fuel via batch adsorption experiments at mild conditions. The prepared adsorbent was characterized by XRD, AFM, BET, SEM, and EDX analysis. The results revealed that the prepared adsorbent is a nanoscale material with average particles size of 48.9 nm and a large surface area of about 710.12 m2/g. The adsorbent containing TiO2 content 6.33 wt.% achieved a desulfurization efficiency higher than 99% when the initial sulfur concentration in the model fuel was 100 ppm. A high static saturated sulfur capacity of 24.08 (mg S/g adsorbent) was achieved. Equilibrium analysis was investigated with Freundlich, Langmuir, and Temkin isotherm models. Experimental data show the goodness of fitting with Langmuir isotherm and the correlation coefficients (R2) values were in the order of Langmuir > Freundlich > Temkin.

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History

  • Receive Date: 06 December 2021
  • Revise Date: 19 January 2022
  • Accept Date: 05 March 2022

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