Photocatalytic oxidative desulfurization of dibenzothiophene by C/TiO2@MCM-41 nanoparticles under visible light and mild conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34652-34662 ◽  
Author(s):  
Mahshid Zarrabi ◽  
Mohammad H. Entezari ◽  
Elaheh K. Goharshadi
Keyword(s):  
Fuel Cell ◽  
Oxidative Desulfurization ◽  
Environmental Pressures ◽  
Mild Conditions ◽  
Ultra Low Sulfur Diesel ◽  
Deep Desulfurization ◽  
Desulfurization Process ◽  
Petroleum Refineries ◽  
Low Sulfur ◽  
Mcm 41

Today, due to the environmental pressures on the sulfur content of gasoline and fuel cell applications, petroleum refineries need a very deep desulfurization process to reach the ultra-low sulfur diesel (ULSD, 1 ppm).

The quantity and type of ILs needed to form magnetic-heteropolyacid mesoporous catalysts and their highly performance for DBT removal

2020 ◽  
Vol 4 (5) ◽  
pp. 2422-2437 ◽  
Author(s):  
Si-Wen Li ◽  
Wei Wang ◽  
Jian-She Zhao
Keyword(s):  
Ionic Liquid ◽  
Oxidative Desulfurization ◽  
Mesoporous Catalysts ◽  
Desulfurization Process ◽  
Mcm 41

Magnetic-heteropolyacid mesoporous catalysts, formed through the linkage of an ionic liquid, a magnetic Fe3O4@MCM-41 support, and a heteropolyacid, have been prepared and used in the deep oxidative desulfurization process.

An overview of conventional and alternative technologies for the production of ultra-low-sulfur fuels

2019 ◽  
Vol 35 (6) ◽  
pp. 669-705 ◽  
Author(s):  
Prerana Sikarwar ◽  
Vijayalakshmi Gosu ◽  
Verraboina Subbaramaiah
Keyword(s):  
Operating Cost ◽  
Oxidative Desulfurization ◽  
Liquid Fuels ◽  
Valuable Insight ◽  
Alternative Technologies ◽  
Advantages And Disadvantages ◽  
Deep Desulfurization ◽  
Low Sulfur Content ◽  
Low Sulfur ◽  
Alternative Processes

Abstract Environmental concerns have given a great deal of attention for the production of ultra-low-sulfur fuels. The conventional hydrodesulfurization (HDS) process has high operating cost and also encounters difficulty in removing sulfur compound with steric hindrance. Consequently, various research efforts have been made to overcome the limitation of conventional HDS process and exploring the alternative technologies for deep desulfurization. The alternative processes being explored for the production of ultra-low-sulfur content fuel are adsorptive desulfurization (ADS), biodesulfurization (BDS), oxidative desulfurization (ODS), and extractive desulfurization (EDS). The present article provided the comprehensive information on the basic principle, reaction mechanism, workability, advantages, and disadvantages of conventional and alternative technologies. This review article aims to provide valuable insight into the recent advances made in conventional HDS process and alternative techniques. For deep desulfurization of liquid fuels, integration of conventional HDS with an alternative technique is also proposed.

scholarly journals Facile Construction of Magnetic Ionic Liquid Supported Silica for Aerobic Oxidative Desulfurization in Fuel

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1496
Author(s):  
Fujie Liu ◽  
Ming Zhang ◽  
Yongkang Gao ◽  
Haojie Tan ◽  
Hongping Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ball Milling ◽  
Oxidative Desulfurization ◽  
Fuel Oil ◽  
Reaction Conditions ◽  
Deep Desulfurization ◽  
Fuel Demand ◽  
Desulfurization Process ◽  
Milling Method ◽  
Magnetic Ionic Liquid

With the rapid growth in fuel demand, deep desulfurization of fuel oil is vitally necessary for the sake of health and environmental protection. In this work, a kind of magnetic ionic liquid supported silica is prepared by a facile ball milling method, and applied in the aerobic oxidative desulfurization of organosulfurs in fuel. The experimental results indicated that ball milling procedure can increase the specific surface area of samples, which is beneficial to oxidative desulfurization process. Under the optimal reaction conditions, the prepared materials can have an entire removal of aromatic sulfur compounds as well as a good recycling ability. Moreover, the introduction of Fe3O4 did not decline the desulfurization performance, but help the catalyst to be easily separated after reaction.

Effect of Ni on MCM-41 in the Adsorption of Nitrogen and Sulfur Compounds to Obtain Ultra-Low-Sulfur Diesel

2018 ◽  
Vol 61 (15-17) ◽  
pp. 1721-1733 ◽  
Author(s):  
Julio César García-Martínez ◽  
H. A. González-Uribe ◽  
M. M. González-Brambila ◽  
N. G. Flores del Río ◽  
A. López-Gaona ◽  
...  
Keyword(s):  
Sulfur Compounds ◽  
Ultra Low Sulfur Diesel ◽  
Adsorption Of Nitrogen ◽  
Low Sulfur ◽  
Mcm 41

scholarly journals Optimized Ultrasound-Assisted Oxidative Desulfurization Process of Simulated Fuels over Activated Carbon-Supported Phosphotungstic Acid

2018 ◽  
Vol 156 ◽  
pp. 03045 ◽  
Author(s):  
Peniel Jean Gildo ◽  
Nathaniel Dugos ◽  
Susan Roces ◽  
Meng-Wei Wan
Keyword(s):  
Design Of Experiment ◽  
Raw Materials ◽  
Oxidative Desulfurization ◽  
Calorific Value ◽  
Simulated Fuel ◽  
Fuel Oils ◽  
Desulfurization Process ◽  
Ultrasound Assisted ◽  
Face Centered ◽  
Low Sulfur

Recent technological advancements respond to the call to minimize/eliminate emissions to the atmosphere. However, on the average, fuel oils which is one of the major raw materials, is found to increase in sulfur concentration due to a phenomenon called thermal maturation. As such, a deeper desulfurization process is needed to obtain low/ultra-low sulfur fuel oils. In the present study, the ultrasound assisted oxidative desulfurization (UAOD) processes using the H2O2 and HPW-AC oxidizing system applied to simulated fuel (~2800 ppm sulfur in the form of dibenzothiophene, benzothiophene, and thiophene dissolved in toluene), were optimized. After the pre-saturation of the HPW-AC with the simulated fuel, H2O2 was added just before the reaction was commenced under ultrasonic irradiation. After the application of both 2k-factorial design of experiment for screening and Face-Centered Design of Experiment for optimization, it was found that 25.52 wt% of H2O2 concentration, 983.9 mg of catalyst dose, 9.52 mL aqueous phase per 10 mL of the organic phase and 76.36 minutes of ultrasonication time would render 94.74% oxidation of the sulfur compounds in the simulated fuel. After the application of the optimized parameters to kerosene and employing a 4-cycle extraction using acetonitrile, 99% of the original sulfur content were removed from the kerosene using the UAOD optimized parameters. The desulfurization process resulted in a low-sulfur kerosene which retained its basic fuel properties such as density, viscosity and calorific value.

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