Viscosity models for ionic liquids and their mixtures

Area of Science:

• Physical Chemistry
• Chemical Engineering

Background:

• Ionic liquids (ILs) are increasingly used in industrial processes.
• Accurate modeling of IL properties, especially viscosity, is vital for process optimization.
• Viscosity modeling for liquids lacks a universally accepted theoretical framework.

Purpose of the Study:

• To review existing viscosity models for ionic liquids and their mixtures.
• To discuss the scope of application and limitations of these models.
• To analyze the formalism of mixing rules for ILs in comparison to inorganic molten salts.

Main Methods:

• Literature review of viscosity models for ionic liquids.
• Analysis of model applicability and limitations.
• Comparative study of mixing rules for ILs and inorganic molten salts.

Main Results:

• Identified various viscosity models developed or adapted for ionic liquids.
• Discussed the scope and limitations of current models.
• Highlighted the need for improved mixing rules for ILs based on molten salt insights.

Conclusions:

• Robust viscosity models are essential for the industrial implementation of ionic liquids.
• Current models and mixing rules for ILs require further development and validation.
• Leveraging knowledge from inorganic molten salt systems can advance IL viscosity modeling.