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Exploring adsorptive desulfurization of diesel fuel applying DOE

Alternative processes for desulfurization of transportation fuels are receiving increasing attention due to increasingly stringent regulations and fuel specifications in many countries for environmental protection purposes. Adsorption technology has been proposed for the removal of sulfur compounds in fuels. Compared to the hydrodesulfurization process, the adsorptive removal of sulfur compounds seems very promising since adsorption can be accomplished at low temperature and pressure, and the sulfur in fuels can be removed to a very low level. Design of Experiments, DOE, is a powerful statistical tool for exploring new processes or gaining detailed comprehension of existing ones, and then optimizing those processes. In this work organic sulfur compounds were removed from diesel fuel by selective adsorption with different types of commercial activated carbons. Adsorption was carried out in batch adsorbers. The model of the process was developed by way of two-level fractional factorial experimental design with four process parameters. Total sulfur content was measured with wave dispersive x-ray fluorescent spectrometer. Activated carbon Chemviron Carbon SOLCARB™ C3 has given the best desulfurization results. The process is well described within the experimental region by the developed model which was statistically validated.

adsorption; desulfurization; diesel; Design of Experiments; activated carbon

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