Molecular dynamics simulations on extractive desulfurization of fuels by tetrabutylammonium chloride based Deep Eutectic Solvents

Dhawal Shah, Dinara Gapeyenko, Artur Urakpayev, Mehdi Torkmahalleh

Research output: Contribution to journalArticle

Abstract

In the last five years, several new applications of Deep Eutectic Solvents (DESs) have been developed, including extractive desulfurization of fuels. Among several DESs that have been proposed for extraction of sulfur-compounds from liquid fuels, a combination of tetrabutylammonium chloride (TBAC), polyethylene glycol (PEG-200), and ferric chloride (FeCl3) at molar ratio of 4:1:0.05, as the DES, has shown the highest efficiency. We herein implement molecular dynamics simulations to analyze the intermolecular interactions within the DES. The simulations present the role of strong interactions between PEG and chloride ion to explain the sharp decrease in the melting point as observed in the DES. Further next, simulations of the DES with model oil and thiophenic compounds were performed to mimic the desulfurization process of liquid fuel. Results indicate a strong interaction between the TBA ion with the thiophenic compounds. Moreover, effect of several process parameters including temperature, concentration, and the type of the thiophenic compounds was analyzed to understand their effect on the extraction efficiency. In addition, composition of DES was varied by selectively removing either PEG or FeCl3 from the DES to evaluate the influence of each compound on the efficiency of desulfurization process. The results taken together explain the mechanism of desulfurization by the DES and provide insights to development of novel solvents for the process.

LanguageEnglish
Pages254-260
Number of pages7
JournalJournal of Molecular Liquids
Volume274
DOIs
Publication statusPublished - Jan 15 2019

Fingerprint

Desulfurization
eutectics
Eutectics
Molecular dynamics
chlorides
molecular dynamics
Computer simulation
simulation
Polyethylene glycols
liquid fuels
Liquid fuels
tetrabutylammonium
Ions
Sulfur Compounds
sulfur compounds
Sulfur compounds
melting points
Melting point
Chlorides
glycols

Keywords

  • Deep Eutectic Solvents
  • Desulfurization
  • Extraction
  • Molecular dynamics simulations
  • Polymers
  • Thiophenes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Molecular dynamics simulations on extractive desulfurization of fuels by tetrabutylammonium chloride based Deep Eutectic Solvents. / Shah, Dhawal; Gapeyenko, Dinara; Urakpayev, Artur; Torkmahalleh, Mehdi.

In: Journal of Molecular Liquids, Vol. 274, 15.01.2019, p. 254-260.

Research output: Contribution to journalArticle

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