Oxidative processes of desulfurization of liquid fuels

Abstract

Environmental concerns have driven the need to remove sulfur-containing compounds from light oil. As the oxidative desulfurization is conducted under very mild reaction conditions, much attention has been recently devoted to this process. In this contribution, the developments in selective removal of organosulfur compounds present in liquid fuels via oxidative desulfurization, including both the chemical oxidation and biodesulfurization, are reviewed. At the end of each section, a brief account of the research directions needed in this field is also included.

Preparation and Characterization of Mg/TiO2 for Visible Light Photooxidative-Extractive Deep Desulfurization

“…However, this process requires high operating temperature and pressure (approximately 400 o C and 100 atm) leading to high operational cost and energy consumption. Furthermore, HDS has its limitation in removing refractory sulfur compounds with high stearic hindrance (Campos-Martin et al 2010;Jiang et al 2011a). Therefore it is impossible to reduce the sulfur content in diesel down to less than 10 ppm via HDS. There are few reported alternatives for sulfur removal that have been researched and investigated.…”

The oxidation of dibenzothiophene using oxidovanadium(IV)-containing nanofibres as catalyst

“…In search for a complementary approach to the HDS, biodesulfurization (BDS) and oxidative desulfurization (ODS) technologies were introduced. [5][6][7][8][9][10][11][12][13][14][15][16][17] Bio-desulfurization involves the use of microorganisms (e.g. bacteria) to desulfurize fuels under biological processes [5][6][7][8][9][10] while the ODS process involves the oxidation of the sulfur atoms followed by the extraction of the oxidation products.…”

Oxidative Desulphurization of Diesel Fuels

“…In the ODS process, dibenzothiophene can be easily oxidized under mild reaction conditions (low reaction temperature, low pressure) and without the use of hydrogen, which renders the process financially feasible. Since the use of expensive hydrogen is avoided, the process is applicable to small and medium-sized refineries, especially refineries located far from the source of hydrogen 6,7 . Recently, several oxidation systems 8 have been studied, and hydrogen peroxide has been considered a powerful oxidant of sulphur compounds [9][10][11] .…”