Synthesis Of Nano-scale Catalytic Materials With AAO Template Method And Research On FCC Gasoline Modification Reaction

In this thesis, we synthesized novel functional nanomaterials such as CNTs, Fe2O3/AAO,magnetic Fe3O4powder and its composites with AAO template method and composite ironsalts (Fe2+and Fe3+) hydrolysis method. Porous anodic aluminum oxide (AAO) is a kind ofalumina material with evenly distributed and orderly arranged nanoscale pores, mainly usedfor the preparation of one-dimensional nanomaterials. Ferric oxide and ferrous ferric oxide aretwo forms of iron oxides. Ferrous ferric oxide is natural magnic, ferric oxide is the mainingredient of iron oxide desulfurizer. Iron oxides have desulfurization activity, which performwell in both adsorption desulfurization and oxidative desulfurization. We characterized andstructural analyzed the various synthesized nanomaterials, using characterization methodssuch as X-ray powder diffraction (XRD), infrared spectroscopy (IR), Raman spectroscopy(Raman), Thermogravimetry (TG), Scanning electron microscopy (SEM), etc.The main work is as follows:1. Using oxalic acid as the electrolyte, we prepared AAO membrane with Two-stepsanodic-oxidation method, and synthesized Fe2O3/AAO composite material by introducingFe2+and Fe3+to it with impregnation method. XRD, IR and SEM analysis showed that bothof them are amorphous; main ingredient of Fe2O3/AAO composite material is Fe2O3; AAOmembrane has quite good orderliness, whose cell density is100per μm2, aperture is about40nm; Static adsorption desulfurization experiments had been taken to test both of them, theresults proved that the adsorption desulfurization activity of Fe2O3/AAO composite materialis higher than AAO membrane.2Using lignin as carbon source, AAO membrane made by ourselves as template, weobtained CNTs with template method. XRD, Raman, TG and SEM analysis showed that the ithas the highest degree of graphitization of the CNTs obtained roasting at600℃; Thebeginning of combustion of the CNTs obtained is at320℃, and the beginning of the structuralcollapse is at490℃, the tube bodies of the CNTs obtained are straight uniformly andindependently, with the length of several tens of nanometers to several micrometers, thediameter of around60nm.(3) We prepared magnetic Fe3O4powder in aqueous solution with composite iron salts(Fe2+and Fe3+) hydrolysis method; binding protonated urea with phosphotungstic acid asHPW-Urea, being supported on magnetic Fe3O4powder, we obtained HPW-Urea/Fe3O4 composite material. XRD, IR, Raman and TG analysis showed that the main ingredient ofmagnetic Fe3O4powder is Fe3O4; The components of HPW-Urea/Fe3O4composite materialare combined by chemical bonds, and the thermal decomposition temperature of thecomposite material is higher than350℃.(4) Static adsorption desulfurization and H2O2system oxidative desulfurizationexperiments had been taken to test HPW-Urea/Fe3O4composite material and magnetic Fe3O4powder. The results showed that they have similar certain activities of adsorptiondesulfurization in FCC gasoline, but the oxidative desulfurization activity to ethanethiol ofHPW-Urea/Fe3O4composite materials is over40%higher than magnetic Fe3O4powder.