Pressure data modeling of nitrous oxide mixtures with ionic liquids

Abstract

The modeling of pressure data for nitrous oxide (N₂O) mixtures with ionic liquids (IL) is studied, using the Peng-Robinson (PR) equation of state along with the Kwak and Mansoori (KM) mixing rule. A total of 294 experimental data points were analyzed across 20 isotherms for the following systems: N₂O + [Bmim][BF₄], N₂O + [(ETO)₂IM][Tf₂N], and N₂O + [Bmim][Tf₂N]. Ionic liquids exhibit favorable properties such as low volatility, high absorption capacity, and thermal stability, making them suitable for capturing pollutant gases. The results show that the PR/KM model achieves a precise correlation between experimental and calculated data, with deviations below 10%. The study demonstrates the effectiveness of the model in predicting the behavior of these systems, contributing to the optimization of gas capture processes.