Fuel
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5 years ago

Designation of choline functionalized polyoxometalates as highly active catalysts in aerobic desulfurization on a combined oxidation and extraction procedure

Designation of choline functionalized polyoxometalates as highly active catalysts in aerobic desulfurization on a combined oxidation and extraction procedure
Deep oxidation/extraction desulfurization from liquid fuels had been done via choline functionalized polyoxometalates (POMs) [(CH3)3NCH2CH2OH]xNa5−xIMo6O24 (abbreviated as ChxNa5−xIMo6O24, x=1–5) and oxygen. By Ch5IMo6O24, organic sulfurs including dibenzothiophene (DBT), benzothiophene (BT), and 4, 6-dimethyldibenzothiophene (4, 6-DMDBT) could be oxidized with 99% conversion and 100% sulfone selectivity due to its deep eutectic solvent (DES)-like behavior and high activity of IMo6O24 5−. Noteworthily, thiophene was highly selectively oxidized with 96.8% conversion and no oxidation of alkane was found. Ch5IMo6O24 was also available for deep desulfurization for FCC gasoline and diesel to give almost clear products with extremely lower sulfur contents (2.73 and 10.8ppm, respectively) without formation of by-products of oxidation to loss their octane values. The durable stability permitted it reusability.

Publisher URL: www.sciencedirect.com/science

DOI: S0016236117307263

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