Extractive desulfurization of fuel using N-butylpyridinium-based ionic liquids

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 30234-30238 ◽  
Author(s):  
Hongshuai Gao ◽  
Shaojuan Zeng ◽  
Xiaomin Liu ◽  
Yi Nie ◽  
Xiangping Zhang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Environmental Problems ◽  
Sulfur Compounds

Sulfur compounds in fuels have become one of the sources of serious environmental problems.

Fast heterogeneous oxidative desulfurization of dibenzothiophene from ionic liquids supported urchin-liked meso-silica

2020 ◽  
Vol 10 (2) ◽  
pp. 199-205
Author(s):  
Jinrui Zhang ◽  
Ming Zhang ◽  
Jiaqi Liu ◽  
Chao Wang ◽  
Hongping Li ◽  
...  
Keyword(s):  
Air Pollution ◽  
Ionic Liquids ◽  
Reaction Mechanism ◽  
Mild Condition ◽  
Oxidation Product ◽  
High Efficiency ◽  
Oxidative Desulfurization ◽  
Environmental Problems ◽  
Sulfur Compounds ◽  
Green House

As air pollution and green-house effect have caused numerous environmental problems in past decades, and increasing investigations have been focused on reducing the emission of harmful gas such as SOx. Oxidative desulfurization of fuel is considered as a promising method for its high efficiency and mild condition. Herein, ionic liquids supported urchin-liked meso-silica were facilely prepared and applied for heterogeneous oxidative desulfurization, which had a good dispersion of polyoxometalate ionic liquids. With the prepared materials, sulfur compounds can be efficiently removed. Moreover, the oxidation product was analyzed by GC-MS to further investigate reaction mechanism.

Green Chemistry and Green Solvents: An Overview

2020 ◽  
Vol 7 (3) ◽  
pp. 314-325
Author(s):  
Barla Karuna Devi ◽  
Swathi Naraparaju ◽  
Chaganti Soujanya ◽  
Sayan Dutta Gupta
Keyword(s):  
Ionic Liquids ◽  
Green Chemistry ◽  
Chemical Reaction ◽  
Supercritical Co2 ◽  
Environmental Problems ◽  
Green Solvents ◽  
Eutectic Mixtures ◽  
Organic Carbonates

: Green chemistry emphasizes designing novel routes to overcome health and environmental problems that occur during a chemical reaction. Green solvents are used in place of conventional solvents that are hazardous to both human and the environment. Solvents like water, ionic liquids, supercritical CO2, biosolvents, organic carbonates, and deep eutectic mixtures can be used as green solvents. The review focuses on the properties, applications, and limitations of these solvents.

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%.

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.

Separation of sulfur compounds from alkanes with 1-alkylcyanopyridinium-based ionic liquids

2014 ◽  
Vol 69 ◽  
pp. 27-35 ◽  
Author(s):  
Urszula Domańska ◽  
Klaudia Walczak ◽  
Maciej Zawadzki
Keyword(s):  
Ionic Liquids ◽  
Sulfur Compounds

THEORETICAL STUDY ON INTERACTION BETWEEN IONIC LIQUIDS AND AROMATIC SULFUR COMPOUNDS

2011 ◽  
Vol 10 (01) ◽  
pp. 31-40 ◽  
Author(s):  
YI NIE ◽  
XIANGAI YUAN
Keyword(s):  
Hydrogen Bonding ◽  
Ionic Liquids ◽  
Density Functional ◽  
Sulfur Compound ◽  
Ion Pairs ◽  
Benzene Molecule ◽  
Sulfur Compounds ◽  
Functional Theory ◽  
Hydrogen Bonding Interactions ◽  
Bonding Interaction

It is important to understand how ionic liquids interact with aromatic sulfur compounds in view of ionic liquids application in desulfurization from fuels. Ion pairs of N, N-dialkylimidazolium dialkylphosphate ionic liquids were optimized at the Becke3LYP level of density functional theory. The most stable geometries were obtained. The stable ion pairs indicate there exist hydrogen bonding interactions between them. The calculated interaction energies of ion pairs were found to increase in magnitude with decreasing alkyl chain length, and with decreasing anionic radius. Furthermore, the interactions between the IL and aromatic sulfur compound, and benzene molecule were investigated. The results indicate that there exist hydrogen bonds between them. The calculated interaction energy between IL and sulfur compound is larger than that between IL and benzene. The aromatic ring π - π interaction and hydrogen bonding interaction may be the dominant factors to influence the trend of interaction between ILs and aromatic sulfur compounds.

Liquid-Liquid extraction of aromatics and sulfur compounds from base oil using ionic liquids

2016 ◽  
Vol 4 (4) ◽  
pp. 4786-4793 ◽  
Author(s):  
Ghassan M.J. Al Kaisy ◽  
Mohamad Ibrahim Abdul Mutalib ◽  
Mohamad Azmi Bustam ◽  
Jean-Marc Leveque ◽  
Nawshad Muhammad
Keyword(s):  
Ionic Liquids ◽  
Liquid Extraction ◽  
Sulfur Compounds ◽  
Base Oil ◽  
Liquid Liquid Extraction
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