Photocatalytic Oxidation Desulfurization of Diesel Oil Using Ti-containing Zeolite

Requirements for effective photocatalytic oxidative desulfurization of a thiophene-containing solution using TiO2

“…The overall extent of desulfurization at 3% H 2 O 2 was 2% and 62% for the use of water and methanol as the solvent, respectively. These results disagree with previously published work in which a 50% extraction of DBT was achieved with 9% H 2 O 2 and 0.1 g of Ti-containing zeolite catalyst using water as the solvent and flowing air [19]. The disagreement could be attributed to a different design of reactor used in which the reaction conducted with continuous airflow provided ideal mixing that was able to offset the mass-transfer limitation given by using water as the solvent.…”

“…(1)-(3). However, as the TiO 2 loading increases the turbidity of the solution also increases, thus decreasing UV-C light penetration [19]. This phenomenon has been reported in previous investigations regarding optimal catalyst loading.…”

Synthesis and characterization of N-doped TiO 2 nanoparticles and their application in photocatalytic oxidation of dibenzothiophene under visible light

“…TiO 2 with lots of advantages such as superb photocatalytic activity, low cost, abundance, stability, and nontoxic quiddity has culminated in appropriate results as photocatalyst [11,12]. Photocatalytic oxidation of sulfur compounds using the neat and structural modified TiO 2 under ultraviolet (UV) irradiation has recently been considered [8,9,[13][14][15][16][17][18][19]. Matsuzawa et al reported the photocatalytic oxidation of DBT and 4,6-dimethyldibenzothiophene using TiO 2 photocatalyst and H 2 O 2 as oxidant under UV irradiation [8].…”

Photocatalytic Desulfurization of Waste Tire Pyrolysis Oil

“…Then, the higher polarity oxidized products are extracted by exposure to a polar solvent-extracting phase. The application of photocatalysis for deep desulfurization to successfully remove thiophenes and derivatives of benzo-thiophene and dibenzothiophene, which are the models of sulfur compounds in gasoline [16], light oil [17,18] and diesel [19], respectively, has been reported in previous literatures. The results indicated that the photodesulfurization had more reactivity than the conventional HDS to decompose steric dibenzothiophene derivatives such as 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) [17].…”

“…Since the major components in tires are natural and synthetic rubbers, both having long hydrocarbon chains, waste tires have higher heating value (39.1 MJ/kg) [5] compared to waste biomass, such as palm (18)(19)(20) MJ/kg) [6] or rice husk (15 MJ/kg) [7]. Thus, waste tires have a high potential for use as a supplemental energy resource aimed at partially or totally replacing conventional fossil fuels.…”