Catalytic Oxidation of Benzothiophene and Dibenzothiophene in Model Light Oil Ti-MWW

Deep oxidative desulfurization of liquid fuels

“…Titanium-based catalysts have also been subject of studies (Shiraishi et al 2002a,b, Kong et al 2004, Cheng et al 2006, Cui and Wang 2007, Jose et al 2011. Conversion of thiophene in the presence of a copper-loaded titanium silicate (TS-1) was investigated (Jose et al 2011).…”

Aerobic Oxidative Desulfurization: A Promising Approach for Sulfur Removal from Fuels

“…Oxidative desulfurization (ODS), which also operates under mild conditions (< 100 8C, ambient pressure), has attracted much attention in recent years. In this process, sulfur compounds in fuels are oxidized with H 2 O 2 using either zeolitic titanosilicates, [6][7][8] ionic liquids, [9] or quaternary ammonium polytungstophosphates [10] as catalysts to their corresponding sulfoxides and sulfones, which can be subsequently removed by a solvent-extraction process. [6][7][8][9][10] However, the ODS technology remains challenging because of a competing olefinic oxidation reaction, [11,12] poisoning of the titanosilicate catalyst by organonitrogen, [13] the need of large amounts of the extraction solvent (e.g.…”

Oxidative Desulfurization of Model Oil over Au/Ti-MWW

“…Other titanium-containing zeolites such as Ti-beta [5], Ti-HMS [6,8] with larger pore size have been used as catalysts for the oxidation of thiophenes, they were also found with low activity or poor stability. We found that Ti-MWW [13] had high oxidative activity for benzothiophene and dibenzothiophene. The superior activity probably due to the structure of Ti-MWW.…”

“…The superior activity probably due to the structure of Ti-MWW. It consists of 12-membered ring side cups and two independent interlayer and intralayer 10-membered ring channels, one of which contains supercages of 0.71 9 1.8 nm in dimension [13,14].…”