Desulfurization of fuel oil by oxidation and extraction. 2. Kinetic modeling of oxidation reaction

Abstract

were calculated and are shown in Table IV. The distribution coefficient of dibenzothiophene in the unoxidized oil extraction was the highest (5.1). After oxidation, hexyl sulfide was not present in the oxidized oil. The distribution coefficients of dibenzothiophene and phenyl disulfide in the extraction of oxidized oil were increased: from 5.1 to 11.2 for dibenzothiophene and from 1.8 to 4.5 for phenyl disulfide. As for the phenyl sulfide, the distribution coefficient in both extractions was relatively low. These results are consistent with the results described previously. ConclusionsOxidation of the Arabian AGO by nitrogen dioxide has converted the sulfur compounds of the oil to forms that are more polar in nature. These sulfur compounds are more readily extracted by polar solvents, such as lactone, that have been demonstrated to be aromatic/olefinic dissolving, thus resulting in higher sulfur removal, lower solvent-to-oil requirement, and hence, higher extraction This model employs lumping of the sulfur compounds in the oil into four groups, Si, S2, and S3, according to their retention times (hence, boiling points) in the gas chromatograph, and residue (R) containing some of the other three sulfur groups. The first group (Si) had a very fast reaction rate.

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.…”

Development of Novel Nonhydrogenation Desulfurization Process — Oxidative Desulfurization of Distillate —

“…Desulfurization and denitrogenation methods can also use oxidation with NO and solvent extraction of the sulfur and nitro gen containing compounds in shale oil 12), 13) . Another desulfurization method with γ-butyrolactone extraction was followed by oxidation with HNO3 or NO2 under very mild conditions such as atmospheric pressure and low temperature 12) .…”

“…Methanol was not an effective solvent, whereas NMP and DMF achieved substantial desulfurization at the higher solvent ratios, albeit at relatively low yields. The extraction efficiency for atmospheric gas oil (AGO) as well as olefinic coker furnace oil (CFO) and light cycle oil (LCO) were improved by preceding the extraction with oxidation 12), 13) . This enhancement was further improved with increasing severity of oxidation.…”

“…Various oxidative desulfurization processes have been reported using different oxidizing agents and cata lysts, such as organic peracetic acids 4),47), 48) , hydrogen peroxide/acetic acid 30),45),49)～51) , hydrogen peroxide/ heteropolyacids 32), 52) , hydrogen peroxide/inorganic solid acids 41),42),53)～60) , organic peroxide/solid cata lysts 31),38),39),61), 62) , ozone/heterogeneous catalysts 29), 63) oxygen/aldehyde/cobalt catalysts 43) , peroxomonophos , phoric acid 37), 64) , nitrogen oxides/heterogeneous cata lysts 12) , nitric acid 13) , molecular oxygen 65) and other oxidation methods 66)～68) . In the process, the sulfur compounds present in the fuels are oxidized to form the corresponding sulfones.…”

Desulphurization of Transportation Fuels by Per-Formic Acid Oxidant Using MoOx Loaded on ZSM-5 Catalyst

“…Various oxidizing agents are employed in the ODS process, such as nitric oxide, sodium perchlorate, Ozone, hydroperoxides and per-acids generated in situ by the reaction of H 2 O 2 and organic acids like formic acid or acetic acid etc. [1]- [8]. Per-acids constitutes very effective oxidant for ODS process.…”