Molar heat capacity of tetrabutylammonium chloride-based deep utectic solvents and their binary water mixtures

Jamil Naser, Farouq Sabri Mjalli, Zaharaddeen Sani Gano

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1 Citation (Scopus)

Abstract

The molar heat capacities of three tetrabutylammonium chloride (TBAC)-based deep eutectic solvents (DESs) and their binary water mixtures were investigated in this work. Results showed a linear dependence of the molar heat capacity with temperature for all water compositions as well the pure components. The molar heat capacity decreased with increasing water composition for all systems. The TBAC : triethylene glycol system (DES2) showed the highest molar heat capacity (445.00-479.67 J mol-1 K-1) followed by the TBAC : ethylene glycol system (DES3); (288.34-312.59 J mol-1 K-1), while the TBAC : glycerol system (DES1) had the lowest molar heat capacity (281.20-310.85 J mol-1 K-1) among the three DES systems. The excess molar heat capacity, CP E, of the DES-water binary mixtures was determined. Results of CP E showed positive CP E for DES2 and negative CP E for DES3 for the entire range of water composition. DES1 showed a mix of positive and negative CP E values for the mixture. This behavior is explained as a result of the change in the intermolecular interaction between the DES-water molecules in the mixture compared with the DES-DES and water-water molecular interaction in the pure components.

Original languageEnglish
JournalAsia-Pacific Journal of Chemical Engineering
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

heat capacity
Specific heat
chloride
Eutectics
Water
water
Chemical analysis
Ethylene Glycol
Molecular interactions
tetrabutylammonium
Binary mixtures
Glycols
Ethylene glycol
Glycerol
ethylene
Molecules

Keywords

  • Eutectic solvents
  • Heat capacity
  • Melting
  • Molecular interactions
  • Properties
  • Water mixture

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

Cite this

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title = "Molar heat capacity of tetrabutylammonium chloride-based deep utectic solvents and their binary water mixtures",
abstract = "The molar heat capacities of three tetrabutylammonium chloride (TBAC)-based deep eutectic solvents (DESs) and their binary water mixtures were investigated in this work. Results showed a linear dependence of the molar heat capacity with temperature for all water compositions as well the pure components. The molar heat capacity decreased with increasing water composition for all systems. The TBAC : triethylene glycol system (DES2) showed the highest molar heat capacity (445.00-479.67 J mol-1 K-1) followed by the TBAC : ethylene glycol system (DES3); (288.34-312.59 J mol-1 K-1), while the TBAC : glycerol system (DES1) had the lowest molar heat capacity (281.20-310.85 J mol-1 K-1) among the three DES systems. The excess molar heat capacity, CP E, of the DES-water binary mixtures was determined. Results of CP E showed positive CP E for DES2 and negative CP E for DES3 for the entire range of water composition. DES1 showed a mix of positive and negative CP E values for the mixture. This behavior is explained as a result of the change in the intermolecular interaction between the DES-water molecules in the mixture compared with the DES-DES and water-water molecular interaction in the pure components.",
keywords = "Eutectic solvents, Heat capacity, Melting, Molecular interactions, Properties, Water mixture",
author = "Jamil Naser and Mjalli, {Farouq Sabri} and Gano, {Zaharaddeen Sani}",
year = "2017",
doi = "10.1002/apj.2130",
language = "English",
journal = "Asia-Pacific Journal of Chemical Engineering",
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AU - Mjalli, Farouq Sabri

AU - Gano, Zaharaddeen Sani

PY - 2017

Y1 - 2017

N2 - The molar heat capacities of three tetrabutylammonium chloride (TBAC)-based deep eutectic solvents (DESs) and their binary water mixtures were investigated in this work. Results showed a linear dependence of the molar heat capacity with temperature for all water compositions as well the pure components. The molar heat capacity decreased with increasing water composition for all systems. The TBAC : triethylene glycol system (DES2) showed the highest molar heat capacity (445.00-479.67 J mol-1 K-1) followed by the TBAC : ethylene glycol system (DES3); (288.34-312.59 J mol-1 K-1), while the TBAC : glycerol system (DES1) had the lowest molar heat capacity (281.20-310.85 J mol-1 K-1) among the three DES systems. The excess molar heat capacity, CP E, of the DES-water binary mixtures was determined. Results of CP E showed positive CP E for DES2 and negative CP E for DES3 for the entire range of water composition. DES1 showed a mix of positive and negative CP E values for the mixture. This behavior is explained as a result of the change in the intermolecular interaction between the DES-water molecules in the mixture compared with the DES-DES and water-water molecular interaction in the pure components.

AB - The molar heat capacities of three tetrabutylammonium chloride (TBAC)-based deep eutectic solvents (DESs) and their binary water mixtures were investigated in this work. Results showed a linear dependence of the molar heat capacity with temperature for all water compositions as well the pure components. The molar heat capacity decreased with increasing water composition for all systems. The TBAC : triethylene glycol system (DES2) showed the highest molar heat capacity (445.00-479.67 J mol-1 K-1) followed by the TBAC : ethylene glycol system (DES3); (288.34-312.59 J mol-1 K-1), while the TBAC : glycerol system (DES1) had the lowest molar heat capacity (281.20-310.85 J mol-1 K-1) among the three DES systems. The excess molar heat capacity, CP E, of the DES-water binary mixtures was determined. Results of CP E showed positive CP E for DES2 and negative CP E for DES3 for the entire range of water composition. DES1 showed a mix of positive and negative CP E values for the mixture. This behavior is explained as a result of the change in the intermolecular interaction between the DES-water molecules in the mixture compared with the DES-DES and water-water molecular interaction in the pure components.

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