Extraction Coupled with Aerobic Oxidative Desulfurization of Model Diesel Using a B-type Anderson Polyoxometalate Catalyst in Ionic Liquids

The application of a catalytic membrane in the oxidative desulfurization of a multicomponent model diesel formed by most refractory sulfur compounds present in fuel is reported here for the first time. The catalytic membrane was prepared by the impregnation of the active lamellar [Gd(H4nmp)(H2O)2]Cl·2H2O (UAV-59) coordination polymer (CP) into a polymethyl methacrylate (PMMA, acrylic glass) supporting membrane. The use of the catalytic membrane in the liquid–liquid system instead of a powder catalyst arises as an enormous advantage associated with the facility of catalyst handling while avoiding catalyst mass loss. The optimization of various parameters allowed to achieve a near complete desulfurization after 3 h under sustainable conditions, i.e., using an aqueous H2O2 as oxidant and an ionic liquid as extraction solvent ([BMIM]PF6, 1:0.5 ratio diesel:[BMIM]PF6). The performance of the catalytic membrane and of the powdered UAV-59 catalyst was comparable, with the advantage that the former could be recycled successfully for a higher number of desulfurization cycles without the need of washing and drying procedures between reaction cycles, turning the catalytic membrane process more cost-efficient and suitable for future industrial application.

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Deep Oxidative Desulfurization of Fuel Catalyzed by Modified Heteropolyacid: The Comparison Performance of Three Kinds of Ionic Liquids

ACS Sustainable Chemistry & Engineering ◽

10.1021/acssuschemeng.8b04524 ◽

2018 ◽

Vol 6 (11) ◽

pp. 15858-15866 ◽

Cited By ~ 15

Author(s):

Si-Wen Li ◽

Rui-Min Gao ◽

Jian-she Zhao

Keyword(s):

Ionic Liquids ◽

Oxidative Desulfurization

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Effective removal of nitrogen compounds from model diesel fuel by easy-to-prepare ionic liquids

Separation and Purification Technology ◽

10.1016/j.seppur.2019.04.026 ◽

2019 ◽

Vol 222 ◽

pp. 92-98 ◽

Cited By ~ 8

Author(s):

Yunchang Fan ◽

Dongxu Cai ◽

Sheli Zhang ◽

Huiying Wang ◽

Kaigang Guo ◽

...

Keyword(s):

Ionic Liquids ◽

Diesel Fuel ◽

Nitrogen Compounds ◽

Effective Removal ◽

Model Diesel

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Iron Oxide Catalyst for Oxidative Desulfurization of Model Diesel Fuel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1010.418 ◽

2020 ◽

Vol 1010 ◽

pp. 418-423

Author(s):

Nor Atiq Syakila Mohd Nazmi ◽

Wan Nazwanie Wan Abdullah ◽

Farook Adam ◽

Wan Nur Aini Wan Mokhtar ◽

Noor Fatimah Yahaya ◽

...

Keyword(s):

Iron Oxide ◽

New Technology ◽

Oxidative Desulfurization ◽

Impregnation Method ◽

X Ray ◽

Diesel Fuels ◽

Extraction Solvent ◽

Tert Butyl Hydroperoxide ◽

Catalytic Oxidative Desulfurization ◽

Model Diesel

— The catalytic oxidative desulfurization (Cat-ODS) process has been introduced as a new technology to achieve ultra-low sulphur levels in diesel fuels. In this study, the performance of the alumina supported iron oxide based catalysts doped with cobalt, synthesized via wet impregnation method on the Cat-ODS of the model diesel with the total sulphur 500ppm was investigated using tert-butyl hydroperoxide (TBHP) as an oxidizing agent and N,N-dimethylformamide as an extraction solvent. A series of dopant was being screened. Co/Fe-Al2O3 (10:90) and Co/Fe-Al2O3 (20:80) prepared at 400°C. Overall, the catalytic activity decreased as dopant ratio increased. Catalyst with 10 wt% of Co was successfully removed 96% of thiophene, 100% of DBT and 92% of 4,6-DMDBT in model diesel. Further investigation, potential catalyst that calcined at 400°C contributed higher sulphur removal compared to the catalyst calcined at 500°C. X-ray diffraction analysis (XRD) result showed that Co/Fe-Al2O3 (10:90) prepared at 400°C was amorphous, while micrograph of the field emission scanning electron microscopy (FESEM) illustrated an inhomogeneous distribution of various particle sizes. The energy dispersive X-ray analysis (EDX) result have confirmed the presence of Fe and Co in all of the prepared catalyst.

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