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

Jamil Naser; Farouq Sabri Mjalli; Zaharaddeen Sani Gano

doi:10.1002/apj.2130

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

Jamil Naser, Farouq Sabri Mjalli^*, Zaharaddeen Sani Gano

^*Corresponding author for this work

Petroleum and Chemical Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (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, C_P ^E, of the DES-water binary mixtures was determined. Results of C_P ^E showed positive C_P ^E for DES2 and negative C_P ^E for DES3 for the entire range of water composition. DES1 showed a mix of positive and negative C_P ^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 language	English
Journal	Asia-Pacific Journal of Chemical Engineering
DOIs	https://doi.org/10.1002/apj.2130
Publication status	Accepted/In press - 2017

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

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10.1002/apj.2130

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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 - Naser, Jamil

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.

KW - Eutectic solvents

KW - Heat capacity

KW - Melting

KW - Molecular interactions

KW - Properties

KW - Water mixture

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

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Keywords

ASJC Scopus subject areas

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