The production of ultra-low-sulfur diesel is an important worldwide demand. In this work a novel integrated method for desulfurization of diesel is proposed based on the combination of Bronsted acid catalyzed oxidation and the selective removal of the oxidized products using a molecularly imprinted polymer (MIP) produced in supercritical carbon dioxide (scCO(2)). The biphasic oxidation reaction of dibenzothiophene sulfone (DBT), as model substrate, and H2O2 as oxidant, was optimized by testing different acid catalysts, and also different phase transfer catalysts (PTC), including two different ionic liquids (ILs) trihexyl(tetradecyl)phosphoniumchloride [P-6,P-6,P-6,P-14]Cl and Aliquat(R). The products of the efficient oxidation of DBT, dibenzothiophene sulfoxide (DBTSO) and dibenzothiophene sulfone (DBTSO2), were then selectively removed from real diesel using the MIP.
- SUPERCRITICAL CARBON-DIOXIDE