Oxidation of Sulfur Components in Diesel Fuel with Tert-Butyl Hydroperoxide Using Chromium Containing Catalysts

Transition metal (iron, cobalt, and chromium) substituted Hexagonal Mesoporous Aluminophosphate (HMA), and AlPO4-5 were studied for the oxidative desulfurization (ODS) reaction of refractory sulfur compounds such as DBT (dibenzothiophene) and 4,6-DMDBT (4,6- dimethyldibenzothiophene). Selective oxidation activity varies with the kind of transition metal employed. The ODS activity of HMA substituted catalyst follows the order: CrHMA >> CoHMA ≥ FeHMA. Comparison between HMA and AlPO-5, CrHMA catalyst shows better performance than Cr-AlPO4-5 catalyst when tert-butyl hydroperoxide is used as oxidizing agent.

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Optimization of oxidative desulfurization of Malaysian Euro II diesel fuel utilizing tert-butyl hydroperoxide–dimethylformamide system

Fuel ◽

10.1016/j.fuel.2015.08.031 ◽

2015 ◽

Vol 161 ◽

pp. 26-33 ◽

Cited By ~ 15

Author(s):

Wan Nur Aini Wan Mokhtar ◽

Wan Azelee Wan Abu Bakar ◽

Rusmidah Ali ◽

Abdul Aziz Abdul Kadir

Keyword(s):

Diesel Fuel ◽

Oxidative Desulfurization ◽

Butyl Hydroperoxide ◽

Tert Butyl ◽

Tert Butyl Hydroperoxide

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ChemInform Abstract: Transition Metal Catalyzed Oxidations. Part 13. Oxidative N-Dealkylation of Secondary N-Aryl-N-alkyl Amines and Cleavage of Nitrones with Zr(OtBu)4/tert-Butyl Hydroperoxide.

ChemInform ◽

10.1002/chin.199947073 ◽

2010 ◽

Vol 30 (47) ◽

pp. no-no

Author(s):

Karsten Krohn ◽

Jochen Kuepke

Keyword(s):

Transition Metal ◽

Butyl Hydroperoxide ◽

Tert Butyl ◽

Alkyl Amines ◽

Tert Butyl Hydroperoxide ◽

Transition Metal Catalyzed ◽

Metal Catalyzed

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1107.341 ◽

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.

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