SAFT-γ Equation of State to Model the High-Pressure Densities of Imidozalium-Based Ionic Liquids with Cyano-Functionalized Anions
Publish place: Third Persian Gulf Oil, Gas and Petrochemical Conference
Publish Year: 1399
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
OGPC03_103
تاریخ نمایه سازی: 12 آبان 1400
Abstract:
A group contribution (GC) procedure, on the basis of SAFT-γ equation, is extended to cover new families of imidazolium-based ionic liquids (ILs), with either the [SCN], [N(CN)۲], [C(CN)۳] or [B(CN)۴] anions. In this GC model, IL system is decomposed into the chemical groups of the cationic head, CH۳, CH۲, and the anion. The anion-cationic head association interactions were taken into consideration by introducing appropriate association sites on the cation head and the anion groups. The IL groups of the SAFT-γ equation were fit to IL density data at temperatures from ۲۶۲ to ۴۱۲ K. Pressures varied up to ۲۰۰ MPa. Sixteen anion group parameters and eight parameters of association amongst the cationic head and the anions were determined. Finally, the strength of SAFT-γ in predictions was investigated by estimating the density of ILs, for some ILs which were not considered in the fitting process. The average absolute relative deviations in density predictions did not exceed ۱.۴%.
Authors
Seyedeh-Saba Ashrafmansouri
Chemical Engineering Department, University of Larestan, Lar, Iran
Sona Raeissi
School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran