Integrated desulfurization of diesel by combination of metal-free oxidation and product removal by molecularly imprinted polymers

Joana P. Ferreira, Raquel Viveiros, Anita Loureno, Mara Soares da Silva, Andreia Rosatella, Teresa Casimiro, Carlos A. M. Afonso

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)54948-54952
Number of pages5
JournalRCS Advances
Volume4
Issue number98
DOIs
Publication statusPublished - 2014

Keywords

  • SUPERCRITICAL CARBON-DIOXIDE
  • DIBENZOTHIOPHENE
  • SURFACE
  • SULFIDES
  • SULFONES
  • GASOLINE
  • CHITOSAN
  • CATALYST
  • FUELS
  • MICROSPHERES

Cite this

Ferreira, J. P., Viveiros, R., Loureno, A., da Silva, M. S., Rosatella, A., Casimiro, T., & Afonso, C. A. M. (2014). Integrated desulfurization of diesel by combination of metal-free oxidation and product removal by molecularly imprinted polymers. RCS Advances, 4(98), 54948-54952. https://doi.org/10.1039/c4ra11666f