d-Limonene and 1-Pentanol Mixtures: Vapor-Liquid Equilibrium Analysis Using Molecular Dynamics

Area of Science:

• Chemical Engineering
• Physical Chemistry
• Computational Chemistry

Background:

• Vapor-liquid equilibrium (VLE) data are essential for fragrance product development and separation processes.
• Experimental determination of VLE data is often costly and time-consuming.
• Molecular dynamics (MD) simulations offer a potential alternative for calculating VLE data.

Purpose of the Study:

• To investigate the application of molecular dynamics (MD) simulations for calculating VLE data of fragrance components.
• To evaluate the accuracy of MD simulations by comparing results with experimental data.
• To analyze molecular-level behavior at the vapor-liquid interface.

Main Methods:

• Conducting molecular dynamics (MD) simulations for a mixture of d-limonene and 1-pentanol.
• Varying the molar fraction of d-limonene in the simulations.
• Calculating VLE data, including x-y phase diagrams and activity coefficients.
• Analyzing density profiles at the vapor-liquid interface.

Main Results:

• MD simulations accurately predicted VLE data for the d-limonene and 1-pentanol mixture.
• Calculated x-y phase diagrams and activity coefficients showed high agreement with experimental values.
• Molecular-level analysis indicated a slight enrichment of 1-pentanol at the vapor-liquid interface.

Conclusions:

• Molecular dynamics simulations are a reliable and cost-effective method for obtaining VLE data for fragrance components.
• The study validates the use of MD for predicting phase behavior crucial for industrial applications.
• Understanding interfacial phenomena provides deeper insights into mixture behavior.