A recyclable ionic liquid-oxomolybdenum( vi ) catalytic system for the oxidative desulfurization of model and real diesel fuel
2016; Royal Society of Chemistry; Volume: 45; Issue: 38 Linguagem: Inglês
10.1039/c6dt02065h
ISSN1477-9234
AutoresDiana Julião, Ana C. Gomes, Martyn Pillinger, Rita Valença, Jorge C. Ribeiro, Isabel S. Gonçalves, Salete S. Balula,
Tópico(s)Asymmetric Hydrogenation and Catalysis
ResumoThe oxidative desulfurization of model and real diesel has been studied using the complex [MoO2Cl2(4,4'-di-tert-butyl-2,2'-bipyridine)] as (pre)catalyst, aq. H2O2 as oxidant, and an ionic liquid as extraction solvent. Under moderate conditions (50 °C) and short reaction times (<3 h), dibenzothiophene, 4-methyldibenzothiophene and 4,6-dimethyldibenzothiophene could be completely removed from the model diesel. The (pre)catalyst 1 was transformed in situ to the active catalyst [MoO(O2)2(di-tBu-bipy)]. By sequentially performing extractive desulfurization and ECODS steps, 76% sulfur removal was achieved for a real diesel (Sinitial = 2300 ppm). For both the model and real diesels, the catalyst/IL phase could be easily recycled and reused with no loss of desulfurization efficiency.
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