Supported The V <sub> 2 </ Sub> O <sub> 5 </ Sub> Catalyst Diesel Component Oxide Open-loop And Improve The Cetane Number

In this work, four different kinds of supported V2O5 catalysts were synthesized using impregnation method. N2-physical adsorption-desorption was employed to ascertain surface area and pore size distribution of the supports and catalysts; FT-IR was used to characterize the structure of the catalysts and the active groups distributed on the catalysts; TGA was employed to measure the dehydration and decomposition of the catalyst precursor, and the decomposition of the acid groups on the surface of catalysts; X-ray diffraction and TEM were utilized to ascertain the physical structure of the catalysts; Py-IR and NH3-TPD were used to characterize the acid species and acidity of the catalysts. The results indicate that the surface area of all the catalysts are smaller than that of the support materials;-OH groups are existed on the surface of supports and catalysts, which interacted with the catalyst active species; the crystal structure of TiO2 can be changed by inducing V2O5 species, but for V2O5/SO42-/ZrO2, the crystal structure is on a large degree influenced by the terminal pH value of preparing catalyst precursor Zr(OH)4. All the four prepared catalysts have the acid sites with both lewies and brounst sites, while the acidity of V2O5/SO42-/ZrO2 is much higher than that of V2O5/TiO2.Two different kinds of oxidation method, Deep Oxidation—Esterifiction method and Selective Oxidation—Ring Opening method, were employed in the oxidation of light gas oil. The experimental results show that the fractions of light gas oil could be oxidized to acid, and could be further transferred to methyl ester after esterifiction reaction.To investigate the influence of supported V2O5 on cetane number of diesel during catalytic oxidation process, the cetane number of light gas oil and its oxidized product, as well as a series of mono-esters and di-esters with linear structure are tested by Ignition Quality Tester(IQTTM)according to ASTM D 6890. The results indicated that the cetane number of light gas oil increased after catalytic oxidation, and the cetane number of linear esters with the same structure increased with the carbon number.