Abstract
In this study, nano TiO2 was prepared with titanium isopropoxide (TTIP) as a resource to titanium oxide. The catalyst was synthesized using phosphotungstic acid (PTA) and, stearyl trimethyl ammonium bromide (STAB) was used as the structure-directing material. Characterization of the product was done by the X-ray diffraction (XRD), X-ray fluorescent spectroscopy (XRF), nitrogen adsorption/desorption measurements, Atomic Force Microscope (AFM) and Fourier transform infrared (FTIR) spectra, were used to characterize the calcined TiO2 nanoparticles by STAB and PWA. The TiO2 nanomaterials were prepared in three crystalline forms (amorphous, anatase, anatase-rutile). The results showed that the nanoparticles of anatase TiO2 have good catalytic oxidative activity. This is because of the conversions of 100% within 90 sec from 300 ppm of dibenzothiophene. This is compared to conversion rates for anatase–rutile nanoparticles and amorphous nanoparticles which reached 52% and 31 %, respectively. The influence of the temperature of reaction, catalyst amount, H2O2 concentration, and initial DBT concentration on the oxidation of DBT was investigated.
Highlights
The process of deep desulfurization of fuel has been known around the world
The patterns of X-ray diffraction (XRD) show that different forms of nanoparticles of TiO2 can be produced by different calcination temperatures
Different interactions between the surfactant and the precursor of titania exist. These include electrostatic, van der Waals interactions, and hydrogen bonding. This is in the case of stearyl trimethyl ammonium bromide (STAB)- paths and apart from the bonds of hydrogen that exist between both phosphotungstic acid (PTA) and titanium tetra-isopropoxide
Summary
The process of deep desulfurization of fuel has been known around the world. This is because of the air that is polluted by the oxides of sulfur. Hydro-desulfurization (HDS) is used to get rid of the compounds of sulfur. It needs high values of temperature and pressure to be completed. Investigation and studied, catalysts of titanium and used in the process of oxidative desulfurization (ODS). These catalysts gave good performance in the system of ODS. Titanium silicalite (TS), e.g. micro/mesoporous TS-1 Jin, et al, 2008, investigated the sulfur removal considering TiO2/SiO2 ratio hexagonal mesoporous molecular sieves containing
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