Diffusion coefficient of hexamethylene tetramine in concentrated aqueous solutions

1972 ◽  
Vol 17 (1) ◽  
pp. 85-87 ◽  
Author(s):  
John R. Bourne ◽  
Ramesh C. Trivedi
Keyword(s):  
Diffusion Coefficient ◽  
Aqueous Solutions ◽  
Concentrated Aqueous Solutions ◽  
Hexamethylene Tetramine

Investigations of clustering of ions and diffusivity in concentrated aqueous solutions of lithium chloride by molecular dynamic simulations

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15328-15337 ◽  
Author(s):  
Meena B. Singh ◽  
Vishwanath H. Dalvi ◽  
Vilas G. Gaikar
Keyword(s):  
Diffusion Coefficient ◽  
Aqueous Solutions ◽  
Molecular Dynamic ◽  
Lithium Chloride ◽  
Molecular Dynamic Simulations ◽  
Coordination Structure ◽  
Dynamic Simulations ◽  
Concentrated Aqueous Solutions

The diffusion coefficient of Li+ ions decreases with increase in LiCl concentration which depends on the size of coordination structure of ions formed in solutions.

scholarly journals Surface Thermodynamics, Viscosity, Activation Energy of N-Methyldiethanolamine Aqueous Solutions Promoted by Tetramethylammonium Arginate

Entropy ◽  
2020 ◽  
Vol 22 (12) ◽  
pp. 1337
Author(s):  
Xiangfeng Tian ◽  
Lemeng Wang ◽  
Pan Zhang ◽  
Dong Fu
Keyword(s):  
Activation Energy ◽  
Surface Tension ◽  
Diffusion Coefficient ◽  
Aqueous Solutions ◽  
Quantitative Relationship ◽  
Viscosity Data ◽  
Surface Thermodynamics ◽  
Surface Entropy ◽  
Operation Conditions ◽  
Surface Enthalpy

The surface tension and viscosity values of N-methyldiethanolamine (MDEA) aqueous solutions promoted by tetramethylammonium arginate ([N1111][Arg]) were measured and modeled. The experimental temperatures were 303.2 to 323.2 K. The mass fractions of MDEA (wMDEA) and [N1111][Arg] (w[N1111][Arg]) were 0.300 to 0.500 and 0.025 to 0.075, respectively. The measured surface tension and viscosity values were satisfactorily fitted to thermodynamic models. With the aid of experimentally viscosity data, the activation energy (Ea) and H2S diffusion coefficient (DH2S) of MDEA-[N1111][Arg] aqueous solution were deduced. The surface entropy and surface enthalpy of the solutions were calculated using the fitted model of the surface tension. The quantitative relationship between the calculated values (surface tension, surface entropy, surface enthalpy, viscosity, activation energy, and H2S diffusion coefficient) and the operation conditions (mass fraction and temperature) was demonstrated.

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