Abstract-The removal of organo-sulfur compounds (ORS) from diesel fuel is an important aspect of all countries to reduce air pollution by reducing the emission of toxic gases such as sulfur oxides and other polluted materials. One of the easily and fast method to remove sulfur from diesel oil is the adsorption desulfurization process. Adsorption-desulfurization process of diesel fuel was proposed and examined. Local diesel fuel of 410 ppm sulfur content was treated with commercial activated carbon and carbonized date palm kernel powder at room temperature in batch work. The contact time were examined and chosen. The addition of activated carbon caused reduction in sulfur content by more than 54% of the original sulfur content value while carbonized date palm kernel powder without any activation process showed lower performance toward sulfur recovery. This high reduction will definitely improve the emission quality and reduce the harmful effect of the combustion process of diesel fuel to the environment.
Vapor diffusion was studied from volatile liquids of three brands of UAE gasoline: Super, Special, E+ and a mixture of these brands. The studying was conducted at 50 oC which represent the highest atmospheric temperature in UAE. The diffusion coefficients of Super gasoline ( 98 Octane number) was equal to 6.348 E-07, for special gasoline ( 95 octane number) equal to 7.353 E-07, for E+ (octane number 91) equal to 2.169 E-06, and the mixture of these three brands is 6.302E-07 m2/s. This concluded that super gasoline which has the higher octane number, minimum density, and higher heat of combustion has the lowest diffusion coefficient with air
Oil sludge (OS) has been used as partial replacement of asphalt binder for road asphalt production. The properties of OS were studied and the results showed that it has high content of heavy oil. The oil removal from OS using the solvent extraction process showed the limitation of removing heavy oil content. The maximum removal of oil content was equal to 47%. This means that the remaining residue cannot be landfilled or disposed because of the high amount of heavy oil which contains heavy metals. OS was added to asphalt binder in specific amounts just to keep the properties of the final asphalt material within standard specification limits. Three percentages of OS to asphalt binder material were studied. Many tests were performed such as Marshall design experiment, penetration, flash point, softening point, stability and flow and loss of stability. The resultant tests of softening point, penetration point, stability, loss of stability, stiffness and flow showed the possibility of using 4% of this material as one of the materials of asphalt binder.
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