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Influence of absorbed dose and temperature on physical properties of bis(2-ethylhexyl) diglycolamic acid (HDEHDGA) in n-dodecane

  • Jammu Ravi
  • Satyabrata Mishra
  • Remya Murali
  • Elizabeth Augustine
  • N. K. PandeyEmail author
Article
  • 13 Downloads

Abstract

N,N-di-2-Ethylhexyl diglycolamic acid (HDEHDGA) in n-dodecane is being emerged as a promising solvent for the separations at the back-end of nuclear fuel cycle. Present paper deals with the evaluation of its density, viscosity and inter facial tension, and their dependency on absorbed dose, temperature and composition. The experimental data was used to calculate apparent molar volume, excess molar volume, viscosity deviation, activation energy for viscous flow, enthalpy and entropy changes of activation. Redlich–Kister type equation was solved for these properties, the coefficients of third degree polynomial that fitted with the experimental data, and their dependency on temperature and absorbed dose was studied.

Keywords

Reprocessing Actinide Radiation stability Density Viscosity Apparent molar volume 

List of symbols

η

Viscosity of pure liquid (mPa s)

A

Constant in Andrade’s relation

Ea

Activation energy for viscous flow (kJ mol−1)

R

Gas constant (J mol−1 K−1)

T

Absolute temperature (K)

G*

Free energy of activation of a liquid phase

h

Planck’s constant

R

Universal gas constant

NA

Avogadro’s number

V

Molar volume of mixture

x

Mole fraction of component in the solution

M

Molecular mass of component

ΔH*

Enthalpy of activation

ΔS*

Entropy of activation

Vϕ

Apparent molar volume

VE

Excess molar volume

η

Viscosity deviations

m

Molality of component

ρm

Density of mixture

ρ

Density of pure component

\( V_{\phi }^{\infty } \)

Partial molar volume at infinite dilution (standard partial molar volume)

Sv

Constant

Δη

Viscosity deviation

ηm

Viscosity of the mixture

Y

Excess molar volume (VE) or viscosity deviations (∆η)

n

Degree of polynomial Redlich–Kister equation

Aqi

Parametric coefficients of property q

Bqij

Absorbed dose dependent parametric coefficients

aqi

Temperature dependent parametric coefficients

σ

Standard deviation

Subscript

i

Component

1

Component HDEHDGA

2

Component n-dodecane

Notes

Acknowledgements

Authors would like to thank Dr. K. A. Venkatesan of Fuel Chemistry Division, IGCAR for allowing his lab facilities during the synthesis of HDEHDGA.

Supplementary material

10967_2019_6499_MOESM1_ESM.docx (34 kb)
Supplementary material 1 (DOCX 33 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Reprocessing GroupIndira Gandhi Centre for Atomic ResearchKalpakkamIndia

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