Scholarlink

<p>The present work introduces a modification to the expanded fluid-based viscosity correlation (originally proposed by Yarranton and Satyro in 2009 for hydrocarbons) in order to obtain improved representations of the dynamic viscosity of several representative modern ionic fluids: pure ionic liquids (ILs) and deep eutectic solvents (DESs). The strong non-linearity introduced by the two-nested exponential form in the original Yarranton–Satyro correlation has been presently simplified by expressing the argument of the outer exponential as a linear combination of inverse powers of the reduced temperature and a logarithmic term involving the compressed state density in a vacuum <i>ρ</i><sub><i>s</i></sub><sup>0</sup>, the fluid density <i>ρ</i>, and the pressure. The resulting modified Yarranton–Satyro (MYS) correlation thus contains two key thermodynamic potentials (<i>ρ</i><sub><i>s</i></sub><sup>0</sup> and <i>ρ</i>) which in turn were estimated via the use of two simple cubic equations of state of the van der Waals type: Soave–Redlich–Kwong or Peng–Robinson. The present MYS approach was successfully verified during the correlation and prediction of experimental dynamic viscosities of 3 families of imidazolium-based ILs ([C<sub>X</sub>mim][BF<sub>4</sub>], [C<sub>X</sub>mim][PF<sub>6</sub>], and [C<sub>X</sub>mim][Tf<sub>2</sub>N]), one pyridinium-based IL ([b3mpy][BF<sub>4</sub>]), one pyrrolidinium-based IL ([P14][Tf<sub>2</sub>N]), one ammonium-based IL ([N1114][Tf<sub>2</sub>N]), and four ILs having non-fluorinated anions ([dmim][MeSO<sub>4</sub>], [bmim][EtSO<sub>4</sub>], [bmim][Ac], and [b3mpy][dca]) over a temperature range varying from 273.15&#xa0;K to 438.15&#xa0;K and at pressures from 1 to 3000&#xa0;bar. We also considered three archetypal choline chloride-based DESs for model validation: Reline, Ethaline, and Glyceline within a temperature range varying from 293.15&#xa0;K to 373.15&#xa0;K and at pressures from 1 to 1000&#xa0;bar.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Simple Viscosity Model Based on an Expanded Fluid Correlation for Ionic Fluids

  • 期刊论文

  • 发表日期：

    2025年10月27日

查看全文
  • Ricardo Macías-Salinas,
  • Rafael A. Loza-García,
  • Obed A. Solis-González

摘要

The present work introduces a modification to the expanded fluid-based viscosity correlation (originally proposed by Yarranton and Satyro in 2009 for hydrocarbons) in order to obtain improved representations of the dynamic viscosity of several representative modern ionic fluids: pure ionic liquids (ILs) and deep eutectic solvents (DESs). The strong non-linearity introduced by the two-nested exponential form in the original Yarranton–Satyro correlation has been presently simplified by expressing the argument of the outer exponential as a linear combination of inverse powers of the reduced temperature and a logarithmic term involving the compressed state density in a vacuum ρs0, the fluid density ρ, and the pressure. The resulting modified Yarranton–Satyro (MYS) correlation thus contains two key thermodynamic potentials (ρs0 and ρ) which in turn were estimated via the use of two simple cubic equations of state of the van der Waals type: Soave–Redlich–Kwong or Peng–Robinson. The present MYS approach was successfully verified during the correlation and prediction of experimental dynamic viscosities of 3 families of imidazolium-based ILs ([CXmim][BF4], [CXmim][PF6], and [CXmim][Tf2N]), one pyridinium-based IL ([b3mpy][BF4]), one pyrrolidinium-based IL ([P14][Tf2N]), one ammonium-based IL ([N1114][Tf2N]), and four ILs having non-fluorinated anions ([dmim][MeSO4], [bmim][EtSO4], [bmim][Ac], and [b3mpy][dca]) over a temperature range varying from 273.15 K to 438.15 K and at pressures from 1 to 3000 bar. We also considered three archetypal choline chloride-based DESs for model validation: Reline, Ethaline, and Glyceline within a temperature range varying from 293.15 K to 373.15 K and at pressures from 1 to 1000 bar.