Desulfurization of diesel oil by selective oxidation and extraction of sulfur compounds by ionic liquids—a contribution to a competitive process design

2010 ◽  
Vol 12 (4) ◽  
pp. 602 ◽  
Author(s):  
Andreas Seeberger ◽  
Andreas Jess
Keyword(s):  
Ionic Liquids ◽  
Selective Oxidation ◽  
Process Design ◽  
Diesel Oil ◽  
Sulfur Compounds ◽  
Competitive Process

scholarly journals Oxidative Extractive Desulfurization System for Fuel Oil Using Acidic Eutectic-Based Ionic Liquid

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1050
Author(s):  
Sarrthesvaarni Rajasuriyan ◽  
Hayyiratul Fatimah Mohd Zaid ◽  
Mohd Faridzuan Majid ◽  
Raihan Mahirah Ramli ◽  
Khairulazhar Jumbri ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Removal Efficiency ◽  
Environmental Effects ◽  
Sulfur Compounds ◽  
Operating Conditions ◽  
Fuel Oil ◽  
Organosulfur Compounds ◽  
Dsc Analysis ◽  
Oil Refineries ◽  
Desulfurization Process

The biggest challenge faced in oil refineries is the removal of sulfur compounds in fuel oil. The sulfur compounds which are found in fuel oil such as gasoline and diesel, react with oxygen in the atmosphere to produce sulfur oxide (SOx) gases when combusted. These sulfur compounds produced from the reaction with oxygen in the atmosphere may result in various health problems and environmental effects. Hydrodesulfurization (HDS) is the conventional process used to remove sulfur compounds from fuel oil. However, the high operating conditions required for this process and its inefficiency in removing the organosulfur compounds turn to be the major drawbacks of this system. Researchers have also studied several alternatives to remove sulfur from fuel oil. The use of ionic liquids (ILs) has also drawn the interest of researchers to incorporate them in the desulfurization process. The environmental effects resulting from the use of these ILs can be eliminated using eutectic-based ionic liquids (EILs), which are known as greener solvents. In this research, a combination of extractive desulfurization (EDS) and oxidative desulfurization (ODS) using a photocatalyst and EIL was studied. The photocatalyst used is a pre-reported catalyst, Cu-Fe/TiO2 and the EIL were synthesized by mixing choline chloride (ChCl) with organic acids. The acids used for the EILs were propionic acid (PA) and p-toluenesulfonic acid (TSA). The EILs synthesized were characterized using thermogravimetry analyser (TGA) differential scanning calorimetry (DSC) analysis to determine the physical properties of the EILs. Based on the TGA analysis, ChCl (1): PA (3) obtained the highest thermal stability whereas, as for the DSC analysis, all synthesized EILs have a lower melting point than its pure component. Further evaluation on the best EIL for the desulfurization process was carried out in a photo-reactor under UV light in the presence of Cu-Fe/TiO2 photocatalyst and hydrogen peroxide (H2O2). Once the oxidation and extraction process were completed, the oil phase of the mixture was analyzed using high performance liquid chromatography (HPLC) to measure the sulfur removal efficiency. In terms of the desulfurization efficiency, the EIL of ChCl (1): TSA (2) showed a removal efficiency of about 99.07%.

Preparation of cerium-loaded Y-zeolites for removal of organic sulfur compounds from hydrodesulfurizated gasoline and diesel oil

2006 ◽  
Vol 298 (2) ◽  
pp. 535-542 ◽  
Author(s):  
Mei Xue ◽  
Ramesh Chitrakar ◽  
Kohji Sakane ◽  
Takahiro Hirotsu ◽  
Kenta Ooi ◽  
...  
Keyword(s):  
Diesel Oil ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Y Zeolites ◽  
Organic Sulfur Compounds

Solubility and selective oxidation of 2-chloroethyl ethyl sulfide in imidazole-based ionic liquids

2017 ◽  
Vol 430 ◽  
pp. 1-8 ◽  
Author(s):  
Zhicheng Wang ◽  
Hailing Xi ◽  
Lingce Kong ◽  
Yanjun Zuo ◽  
Zhenxiang Shi ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Selective Oxidation

Ionic Liquids as Extractants of Diesel Sulfur Compounds

2020 ◽  
Vol 60 (7) ◽  
pp. 762-767
Author(s):  
N. S. Kobotaeva ◽  
T. S. Skorokhodova
Keyword(s):  
Ionic Liquids ◽  
Sulfur Compounds

scholarly journals Effect of Cation Structure in Quinolinium-Based Ionic Liquids on the Solubility in Aromatic Sulfur Compounds or Heptane: Thermodynamic Study on Phase Diagrams

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5687
Author(s):  
Marta Królikowska ◽  
Marek Królikowski ◽  
Urszula Domańska
Keyword(s):  
Ionic Liquids ◽  
Phase Diagrams ◽  
Binary Systems ◽  
Ambient Pressure ◽  
Equilibrium Phase ◽  
Sulfur Compounds ◽  
Solution Temperature ◽  
Organic Sulfur Compounds ◽  
Nrtl Equation ◽  
Solid Liquid

Experimental and theoretical studies on thermodynamic properties of quinolinium-based ionic liquids (ILs) based on bis(trifluoromethylsulfonyl)imide anion (namely N-butyl-quinoloinium bis(trifluoromethylsulfonyl)imide, [BQuin][NTf2], N-hexylquinoloinium bis(trifluoromethyl-sulfonyl)imide, [HQuin][NTf2], and N-octylquinoloinium bis(trifluoromethyl-sulfonyl)imide, [OQuin][NTf2]) with aromatic sulfur compounds and heptane, as a model compound of fuel were examined in order to assess the applicability of the studied ionic liquids for desulfurization of fuels. With this aim, the temperature-composition phase diagrams of 13 binary mixtures composed of organic sulfur compounds (thiophene, benzothiophene, or 2-methylthiophene) or heptane and ionic liquid (IL) were investigated at ambient pressure. A dynamic method was used to determine the (solid–liquid) equilibrium phase diagrams in binary systems over a wide composition range and temperature range from T = 255.15 to 365.15 K up to the fusion temperature of ILs. The immiscibility gap with an upper critical solution temperature (UCST) was observed for each binary system under study. The influence of the alkane chain length of the substituent on the IL cation and of the sulfur compounds (the aromaticity of the solvent) was described. The experimental (solid + liquid) phase equilibrium dataset were successfully correlated using the well-known NRTL equation.

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