Adsorptive desulfurization using different passivated carbon nanoparticles by PEG-200

Rahimeh Naviri Fallah, Saeid Azizian, Amarendra Dhar Dwivedi, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Carbon nanoparticles dispersed in aqueous phase (CNPs) were synthesized using different poly(ethylene glycol) (PEG 200) assistant solution methods including microwave pyrolysis and alkali-assisted heating, ultrasonication, and refluxing. The CNPs (< 5 nm) were used for the selective removal of sulfur thiophenic compounds (benzothiophene (BT), dibenzothiophene (DBT) and dimethyldibenzothiophene (DMDBT)) from liquid model fuels including aromatic compounds (naphthalene (NP) and 1-methylnaphthalene (MNP)). The presence of PEG in the preparation procedure of CNP was crucial and adsorption capability was related to the passivation by PEG. The decomposition of PEG at high temperature introduced more acidic functional groups on the carbon framework and also promoted the formation of porous CNP nanostructures because of hydrophobic PEG aggregations. Adsorption experiments showed the order for CNPs with different method as: microwave irradiation > heating > refluxing > ultrasonication. The highest efficiency of CNPs by microwave-assisted technique for sulfur removal was examined due to the higher decomposition of PEG and more porosity of CNP nanostructures which were produced at higher temperature. Moreover the CNPs were regenerable by a solvent-washing process. This study showed that passivated CNPs are very effective for rapid desulfurization of liquid fuels, operating at ambient conditions with the ease of separation and regeneration.

Original languageEnglish
Pages (from-to)214-223
Number of pages10
JournalFuel Processing Technology
Issue numberC
Publication statusPublished - 1 Feb 2015
Externally publishedYes


  • Adsorption
  • Carbon nanoparticles
  • Desulfurization
  • Liquid fuel

ASJC Scopus subject areas

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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