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    Desulfurization of fuel by leaching using H2O2 and H2SO4
    (Taylor & Francis Inc, 2005) Karaca, H; Yildiz, Z
    In this research, different concentrations of H2O2 and H2SO4 solutions were used in order to remove the sulfur from high sulfur contented No. 6 fuel oil. In desulphurization experiments, reaction temperature, reaction time, and the concentration of H2O2 and H2SO4 were varied in a range of 20-50 degrees C, 30-150 min, 5-35%, and 0.05-2.00 N, respectively. The ratio of reagent/fuel oil was taken as 10/1 and the stirring speed as 1,000 rpm. According to the results obtained, considering the desulphurization and the organic structure of the fuel, the most appropriate method was found as the H2O2 leaching method. It was barely determined that the highest desulphurization was achieved by H2O2/0.1N H2SO4 leaching method. The optimum process parameters for H2O2 leaching method were found as a concentration of 15%, reaction temperature of 30 degrees C, and reaction time of 60 min; and for H2SO4 leaching method were found as concentration of 0.1 N, reaction temperature of 30 degrees C, and reaction time of 150 min. It was observed that by increasing the reaction temperature, reaction time, and reagent concentration, the carbon and hydrogen contents of the fuel decreased considerably and on the contrary the oxygen content increased very rapidly. A partial decrease of nitrogen content was also observed.
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    Desulphurization kinetics of number 6 fuel oil via a chemical method
    (Taylor & Francis Inc, 2005) Karaca, H; Yildiz, Z
    In this research, desulphurization of number 6 fuel oil by the H2O2/H2SO4 method was studied. The effects of reaction temperature and reaction time on desulphurization were examined. Also, kinetic approximation for desulphurization was carried out. It was determined that the maximum desulphurization was performed at conditions of reaction temperature of 40 50 degrees C and reaction time of 150 min. The total sulfur content of the fuel oil sample was reduced from 2.78 to 0.68% at the reaction temperature of 50 degrees C and reaction time of 150 min. As the degree of desulphurization increased, the higher heating value decreased at higher reaction temperatures and reaction times. As a result of kinetic approximation, it was found that the order of the reaction was approximately 0.96 and the rate constant, k = 5.84 (*) 10(6) exp(-65.08/RT), for desulphurization of fuel oil by chemical method.