Polymeric-based deep eutectic solvents for effective extractive desulfurization of liquid fuel at ambient conditions

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Abstract

In this work, the extractive desulfurization of liquid fuel was investigated using a new polymeric DES based on the salt tetrabutyl ammonium bromide (TBAB). Two different light grades of Polyethylene glycol (PEG) were used as hydrogen bond donors. Central Composite Design (CCD) was employed to optimize the operating conditions. The solvents showed high sulfur removal efficiency of DBT and thiophene in simulated fuel. Using a solvent to fuel volume ratio of 1:1 (VDES/VFuel = 1:1), the extraction efficiency reached 82.40% and 62.16% in the first extraction stage at room temperature. Effect of solvent to volume ratio, time, temperature, initial concentration and speed of mixing on extraction efficiency were investigated. The results showed that increasing the speed of mixing has a great influence on the extraction efficiency. The deep desulfurization of the simulated fuel was also carried out in multiple extraction stages. Using a volumetric ratio of VDES/VFuel = 1:1, the DBT and thiophene extraction efficiencies were 100% and 95.15% respectively after three extraction stages. On the other hand, the volumetric ratio of VDES/VFuel = 3:1, achieved efficiencies of 100% and 97.79% after two extraction stages only. This is the minimum number of extraction cycles so far reported using quaternary ammonium based eutectic solvents. Moreover, the deep desulfurization of real diesel was achieved using six extraction stages. Finally, the used DES was successfully regenerated and reused five times without significant loss of solvent activity, which is of utmost necessity from an economical and practical point of view.

Original languageEnglish
Pages (from-to)271-283
Number of pages13
JournalChemical Engineering Research and Design
Volume120
DOIs
Publication statusPublished - Apr 1 2017

Fingerprint

Liquid fuels
Desulfurization
Eutectics
Thiophenes
Thiophene
Ammonium Compounds
Polyethylene glycols
Hydrogen bonds
Salts
Temperature

Keywords

  • Deep eutectic solvents
  • Desulfurization
  • Extraction
  • Liquid fuels
  • Polyethylene glycol

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

@article{0b7e4ecdb8d6467c9590d30db3286a7f,
title = "Polymeric-based deep eutectic solvents for effective extractive desulfurization of liquid fuel at ambient conditions",
abstract = "In this work, the extractive desulfurization of liquid fuel was investigated using a new polymeric DES based on the salt tetrabutyl ammonium bromide (TBAB). Two different light grades of Polyethylene glycol (PEG) were used as hydrogen bond donors. Central Composite Design (CCD) was employed to optimize the operating conditions. The solvents showed high sulfur removal efficiency of DBT and thiophene in simulated fuel. Using a solvent to fuel volume ratio of 1:1 (VDES/VFuel = 1:1), the extraction efficiency reached 82.40{\%} and 62.16{\%} in the first extraction stage at room temperature. Effect of solvent to volume ratio, time, temperature, initial concentration and speed of mixing on extraction efficiency were investigated. The results showed that increasing the speed of mixing has a great influence on the extraction efficiency. The deep desulfurization of the simulated fuel was also carried out in multiple extraction stages. Using a volumetric ratio of VDES/VFuel = 1:1, the DBT and thiophene extraction efficiencies were 100{\%} and 95.15{\%} respectively after three extraction stages. On the other hand, the volumetric ratio of VDES/VFuel = 3:1, achieved efficiencies of 100{\%} and 97.79{\%} after two extraction stages only. This is the minimum number of extraction cycles so far reported using quaternary ammonium based eutectic solvents. Moreover, the deep desulfurization of real diesel was achieved using six extraction stages. Finally, the used DES was successfully regenerated and reused five times without significant loss of solvent activity, which is of utmost necessity from an economical and practical point of view.",
keywords = "Deep eutectic solvents, Desulfurization, Extraction, Liquid fuels, Polyethylene glycol",
author = "{Ahmed Rahma}, {Walaa S.} and Mjalli, {Farouq S.} and Talal Al-Wahaibi and Al-Hashmi, {Abdul Aziz}",
year = "2017",
month = "4",
day = "1",
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language = "English",
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pages = "271--283",
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TY - JOUR

T1 - Polymeric-based deep eutectic solvents for effective extractive desulfurization of liquid fuel at ambient conditions

AU - Ahmed Rahma, Walaa S.

AU - Mjalli, Farouq S.

AU - Al-Wahaibi, Talal

AU - Al-Hashmi, Abdul Aziz

PY - 2017/4/1

Y1 - 2017/4/1

N2 - In this work, the extractive desulfurization of liquid fuel was investigated using a new polymeric DES based on the salt tetrabutyl ammonium bromide (TBAB). Two different light grades of Polyethylene glycol (PEG) were used as hydrogen bond donors. Central Composite Design (CCD) was employed to optimize the operating conditions. The solvents showed high sulfur removal efficiency of DBT and thiophene in simulated fuel. Using a solvent to fuel volume ratio of 1:1 (VDES/VFuel = 1:1), the extraction efficiency reached 82.40% and 62.16% in the first extraction stage at room temperature. Effect of solvent to volume ratio, time, temperature, initial concentration and speed of mixing on extraction efficiency were investigated. The results showed that increasing the speed of mixing has a great influence on the extraction efficiency. The deep desulfurization of the simulated fuel was also carried out in multiple extraction stages. Using a volumetric ratio of VDES/VFuel = 1:1, the DBT and thiophene extraction efficiencies were 100% and 95.15% respectively after three extraction stages. On the other hand, the volumetric ratio of VDES/VFuel = 3:1, achieved efficiencies of 100% and 97.79% after two extraction stages only. This is the minimum number of extraction cycles so far reported using quaternary ammonium based eutectic solvents. Moreover, the deep desulfurization of real diesel was achieved using six extraction stages. Finally, the used DES was successfully regenerated and reused five times without significant loss of solvent activity, which is of utmost necessity from an economical and practical point of view.

AB - In this work, the extractive desulfurization of liquid fuel was investigated using a new polymeric DES based on the salt tetrabutyl ammonium bromide (TBAB). Two different light grades of Polyethylene glycol (PEG) were used as hydrogen bond donors. Central Composite Design (CCD) was employed to optimize the operating conditions. The solvents showed high sulfur removal efficiency of DBT and thiophene in simulated fuel. Using a solvent to fuel volume ratio of 1:1 (VDES/VFuel = 1:1), the extraction efficiency reached 82.40% and 62.16% in the first extraction stage at room temperature. Effect of solvent to volume ratio, time, temperature, initial concentration and speed of mixing on extraction efficiency were investigated. The results showed that increasing the speed of mixing has a great influence on the extraction efficiency. The deep desulfurization of the simulated fuel was also carried out in multiple extraction stages. Using a volumetric ratio of VDES/VFuel = 1:1, the DBT and thiophene extraction efficiencies were 100% and 95.15% respectively after three extraction stages. On the other hand, the volumetric ratio of VDES/VFuel = 3:1, achieved efficiencies of 100% and 97.79% after two extraction stages only. This is the minimum number of extraction cycles so far reported using quaternary ammonium based eutectic solvents. Moreover, the deep desulfurization of real diesel was achieved using six extraction stages. Finally, the used DES was successfully regenerated and reused five times without significant loss of solvent activity, which is of utmost necessity from an economical and practical point of view.

KW - Deep eutectic solvents

KW - Desulfurization

KW - Extraction

KW - Liquid fuels

KW - Polyethylene glycol

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U2 - 10.1016/j.cherd.2017.02.025

DO - 10.1016/j.cherd.2017.02.025

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VL - 120

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JO - Chemical Engineering Research and Design

JF - Chemical Engineering Research and Design

SN - 0263-8762

ER -