Review on Recent Patents in Sulfur Removal from Liquid Fuels by Oxidative Desulfurization (ODS) Process

2010 ◽  
Vol 3 (1) ◽  
pp. 30-37 ◽  
Author(s):  
Maoqi Feng
Keyword(s):  
Sulfur Removal ◽  
Oxidative Desulfurization ◽  
Liquid Fuels

scholarly journals WO3 and Ionic Liquids: A Synergic Pair for Pollutant Gas Sensing and Desulfurization

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 475 ◽  
Author(s):  
Francesca D’Anna ◽  
Maria Luisa Grilli ◽  
Rita Petrucci ◽  
Marta Feroci
Keyword(s):  
Ionic Liquids ◽  
Performance Enhancement ◽  
Gas Adsorption ◽  
Gas Sensing ◽  
Sulfur Removal ◽  
Oxidative Desulfurization ◽  
Catalytic Efficiency ◽  
Liquid Fuels ◽  
High Dispersion ◽  
Catalytic Material

This review deals with the notable results obtained by the synergy between ionic liquids (ILs) and WO3 in the field of pollutant gas sensing and sulfur removal pretreatment of fuels. Starting from the known characteristics of tungsten trioxide as catalytic material, many authors have proposed the use of ionic liquids in order to both direct WO3 production towards controllable nanostructures (nanorods, nanospheres, etc.) and to modify the metal oxide structure (incorporating ILs) in order to increase the gas adsorption ability and, thus, the catalytic efficiency. Moreover, ionic liquids are able to highly disperse WO3 in composites, thus enhancing the contact surface and the catalytic ability of WO3 in both hydrodesulfurization (HDS) and oxidative desulfurization (ODS) of liquid fuels. In particular, the use of ILs in composite synthesis can direct the hydrogenation process (HDS) towards sulfur compounds rather than towards olefins, thus preserving the octane number of the fuel while highly reducing the sulfur content and, thus, the possibility of air pollution with sulfur oxides. A similar performance enhancement was obtained in ODS, where the high dispersion of WO3 (due to the use of ILs during the synthesis) allows for noteworthy results at very low temperatures (50 °C).

Enrichment of polymeric WOx species in WOx@SnO2 catalysts for ultra-deep oxidative desulfurization of liquid fuels

Fuel ◽  
2021 ◽  
Vol 290 ◽  
pp. 120036
Author(s):  
Antony Rajendran ◽  
Hong-Xia Fan ◽  
Tian-You Cui ◽  
Jie Feng ◽  
Wen-Ying Li
Keyword(s):  
Oxidative Desulfurization ◽  
Liquid Fuels

Efficient Oxidative Desulfurization (ODS) of Commercial Diesel with TBHP under Mild Conditions Catalyzed by Polymolybdates Supported on Al2O3

2015 ◽  
Vol 1107 ◽  
pp. 341-346
Author(s):  
Wan Nazwanie Wan Abdullah ◽  
Rusmidah Ali ◽  
Wan Azelee Wan Abu Bakar
Keyword(s):  
Sulfur Content ◽  
Research Work ◽  
Sulfur Removal ◽  
Oxidative Desulfurization ◽  
Catalyst System ◽  
Impregnation Method ◽  
Butyl Hydroperoxide ◽  
Tert Butyl ◽  
Alternative Method ◽  
Tert Butyl Hydroperoxide

Due to the low specifications for sulfur content in diesel, a lot of research work are been conducted to develop alternative method for desulfurization. Catalytic oxidative desulfurization (Cat-ODS) has been found to be an alternative method to replace a conventional method which is hydrodesulfurization.New catalyst formulation using tert-butyl hydroperoxide polymolybdate based catalyst system was investigated in this research utilizing tert-butyl hydroperoxide (TBHP) as oxidant and dimethylformamide (DMF) as solvent for extraction. A series of polymolybdate supported alumina catalysts were prepared using wet impregnation method, ageing at ambient room temperature for 24 hours and followed by calcination process. A commercial diesel with 440 ppmw of total sulfur was employed to evaluate the elimination of sulfur compounds. Besides, the percentage of sulfur removal was measured by gas chromatography-flame photometric detector (GC-FPD). The sulfur content in commercial diesel was successfully reduced from 440 ppmw to 35 ppmw under mild condition followed by solvent extraction. From catalytic testing, Mo-Al2O3 calcined at 500°C was revealed as the most potential catalyst which gave 92% of sulfur removal.

Photocatalytic Oxidative Desulfurization of Model Oil Using Cu/TiO2 Photocatalyst and Eutectic Based Ionic Liquid: Effect of Metal Loading

2014 ◽  
Vol 699 ◽  
pp. 210-214 ◽  
Author(s):  
Hayyiratul Fatimah Mohd Zaid ◽  
Chong Fai Kait ◽  
Muhammad Ibrahim Abdul Mutalib
Keyword(s):  
Ionic Liquid ◽  
Titanium Dioxide ◽  
Sulfur Compound ◽  
Sulfur Removal ◽  
Oxidative Desulfurization ◽  
Copper Metal ◽  
Metal Loading ◽  
Model Oil

Titanium dioxide (TiO2) photocatalyts doped with copper metal at different metal loadings were successfully prepared and characterized. Photocatalytic oxidative desulfurization of model oil containing dibenzothiophene as the sulfur compound (100 ppm) was investigated using the prepared photocatalyst. The photocatalyst with 2.0 wt% Cu metal loading showed the best sulfur removal at 66.25%.

scholarly journals Efficient H2O2/CH3COOH oxidative desulfurization/denitrification of liquid fuels in sonochemical flow-reactors

2014 ◽  
Vol 21 (1) ◽  
pp. 283-288 ◽  
Author(s):  
Emanuela Calcio Gaudino ◽  
Diego Carnaroglio ◽  
Luisa Boffa ◽  
Giancarlo Cravotto ◽  
Elizabeth M. Moreira ◽  
...  
Keyword(s):  
Oxidative Desulfurization ◽  
Liquid Fuels ◽  
Flow Reactors

scholarly journals Sulfur removal from hydrotreated petroleum fractions using ultrasound-assisted oxidative desulfurization process

Fuel ◽  
2011 ◽  
Vol 90 (6) ◽  
pp. 2158-2164 ◽  
Author(s):  
Fábio A. Duarte ◽  
Paola de A. Mello ◽  
Cezar A. Bizzi ◽  
Matheus A.G. Nunes ◽  
Elizabeth M. Moreira ◽  
...  
Keyword(s):  
Sulfur Removal ◽  
Oxidative Desulfurization ◽  
Petroleum Fractions ◽  
Desulfurization Process ◽  
Ultrasound Assisted

scholarly journals Aerobic oxidative desulfurization via magnetic mesoporous silica-supported tungsten oxide catalysts

2020 ◽  
Vol 17 (5) ◽  
pp. 1422-1431
Author(s):  
Wei Jiang ◽  
Xiang Gao ◽  
Lei Dong ◽  
Jin Xiao ◽  
Lin-Hua Zhu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Tungsten Oxide ◽  
Molecular Oxygen ◽  
Sulfur Removal ◽  
Oxidative Desulfurization ◽  
High Catalytic Activity ◽  
Diesel Fuels ◽  
Magnetically Separable Catalyst ◽  
Ft Ir ◽  
Magnetic Mesoporous Silica

Abstract It is usually difficult to remove dibenzothiophenes from diesel fuels by oxidation with molecular oxygen as an oxidant. In the study, tungsten oxide was supported on magnetic mesoporous silica by calcination to form a magnetically separable catalyst for oxidative desulfurization of diesel fuel. By tuning different calcining temperatures, the catalyst calcined at 500 °C showed a high catalytic activity with molecular oxygen as the oxidant. Under optimal reaction conditions, the sulfur removal of DBT reached 99.9% at 120 °C after 8 h. Furthermore, the removals of 4-methyldibenzothiophene and 4,6-dimethyldibenzothiophene could also get up to 98.2% and 92.3% under the same conditions. The reaction mechanism was explored by selective quenching experiments and FT-IR spectra.

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