Use of pour depressants is the most effective and economical method of improving the low-temperature properties of diesel fuels. The reaction of T1804D pour depressant with different solvents was investigated by differential scanning calorimetry. It was shown that they affect the decrease in the limiting filterability temperature and the solid point of diesel fuel to a different degree. The effectiveness of the pour depressant increased when it was mixed with aromatic solvents that ensure dissolution and dispersion of wax crystals in diesel fuel at low temperatures.
Manganese oxide/mesoporous carbon (MnO 2 /MCs) spherical composites were prepared by hydrothermal method. The resorcinol and potassium permanganate were used as carbon source and manganese source,respectively. The morphology and pore character of the carbon materials were investigated by scanning electron microscopy(SEM), Xray diffraction(XRD), and nitrogen adsorption-desorption. The measurements show the sample with the corresponding spherical morphology and mesoporous structure. By controlling the concentration of potassium permanganate, various amount of manganese in carbon/manganese oxide can be obtained. The composite was employed as the support of Au catalyst for CO oxidation. Different amount of gold has been deposited on the as-synthesized carbon sphere/manganese oxide, and the activity and stability of Au catalyst after sintered at 300°C has been tested. The 8%Au/MnO2/MCs-46 catalyst had obvious deactivation on stream after 65h reaction time at the reaction temperature of 185°C. Meanwhile, the sample further used as the supercapacitor electrode materials for electrochemical performance test. The specific capacitance of the MnO 2 /MCs-30 electrode is as high as 275 Fg-1 at 0.5 Ag-1 .
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