engleski

Experimental and modeling study of fixed bed adsorptive desulfurization

Fixed bed adsorptive desulfurization was carried out with model fuel comprising dibenzothiophene dissolved in isomerizate and xylene and an activated carbon as the adsorbent. Sulfur and its various compounds, which could be found in petroleum fractions, are among the main sources of environmental pollution and also negatively affect the car exhaust gas treatment systems. In addition the reduction of sulfur content in petroleum fractions improves the efficiency of processing, and the improved quality of fuel reduces motor ware. Dibenzothiophene is a representative of the refractory sulfur compounds who cannot be easily removed in conventional hydrodesulfurization processes under normal conditions. That is why the alternative separation processes, such as adsorption, are being researched and developed for desulfurization. The application of adsorptive desulfurization in practice is envisioned as an upgrade to hydrodesulfurization process where the adsorption column system would be installed within the hydrodesulfurization plant, downstream to the reactor. In this work the effects of flow rate and bed depth were studied and the experimental data were used for modeling fixed bed adsorption. The batch experiments were also carried out in order to conduct the adsorption equilibrium investigation and to validate fixed bed model data.

desulfurization; fixed bed; adsorption; dibenzothiophene; gasoline

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