Design calculations of an extractor for aromatic and aliphatic hydrocarbons separation using ionic liquids
-
Elena Graczová
,
Pavol Steltenpohl
Abstract
The study concentrates on the separation of aromatic hydrocarbons from aliphatic hydrocarbon mixtures using ionic liquids as a new alternative of extraction solvents. Influence of the phase equilibrium description accuracy on the separation equipment design using different thermodynamic models was investigated. As a model system, a heptane-toluene binary mixture was chosen, employing 1-ethyl-3-methylimidazolium ethyl sulfate (EMIES) ionic liquid as an extractive solvent. Liquid-liquid equilibrium (LLE) data of the ternary system were calculated using NRTL equations with different quality model parameters. Model 1 corresponds to the NRTL equation with the original binary parameters evaluated independently from the respective binary equilibrium data. Model 2 is represented by an NRTL equation extended by the ternary correction term (with the original binary parameters and ternary correction term parameters evaluated from the ternary tie-lines). Model 3, i.e. the NRTL equation with binary model parameters determined via ternary LLE data regression using ASPEN Plus, was taken from Meindersma et al. (2006). Continuous-flow liquidphase extraction was simulated considering a cascade of mixer-settler type extractors according to the Hunter-Nash scheme (Hunter & Nash, 1934). Based on the simulation results, for a preset separation efficiency criterium, different accuracies of the equilibrium description caused serious discrepancies in the separation equipment design, e.g. in the number of theoretical stages, solvent to feed ratio, and product purity.
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© 2012 Institute of Chemistry, Slovak Academy of Sciences
Articles in the same Issue
- Fifty years of the Department of Chemical and Biochemical Engineering at the Slovak University of Technology in Bratislava — brief history of research
- Airlift reactor — membrane extraction hybrid system for aroma production
- CFD-based atmospheric dispersion modeling in real urban environments
- Catalytic gasification of pyrolytic oil from tire pyrolysis process
- Kinetics of thermal decomposition of aseptic packages
- Sulphur distribution in the products of waste tire pyrolysis
- Equilibrium and kinetics of protein binding on ion-exchange cellulose membranes with grafted polymer layer
- Modeling of equilibrium and kinetics of human polyclonal immunoglobulin G adsorption on a tentacle cation exchanger
- Design calculations of an extractor for aromatic and aliphatic hydrocarbons separation using ionic liquids
- Effect of viscosity of a liquid membrane containing oleyl alcohol on the pertraction of butyric acid
- Anaerobic treatment of rapeseed meal
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- Removal of selected chlorinated micropollutants by ozonation
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Articles in the same Issue
- Fifty years of the Department of Chemical and Biochemical Engineering at the Slovak University of Technology in Bratislava — brief history of research
- Airlift reactor — membrane extraction hybrid system for aroma production
- CFD-based atmospheric dispersion modeling in real urban environments
- Catalytic gasification of pyrolytic oil from tire pyrolysis process
- Kinetics of thermal decomposition of aseptic packages
- Sulphur distribution in the products of waste tire pyrolysis
- Equilibrium and kinetics of protein binding on ion-exchange cellulose membranes with grafted polymer layer
- Modeling of equilibrium and kinetics of human polyclonal immunoglobulin G adsorption on a tentacle cation exchanger
- Design calculations of an extractor for aromatic and aliphatic hydrocarbons separation using ionic liquids
- Effect of viscosity of a liquid membrane containing oleyl alcohol on the pertraction of butyric acid
- Anaerobic treatment of rapeseed meal
- Anoxic granulated biomass and its storage
- Removal of selected chlorinated micropollutants by ozonation
- Degradation and toxicity changes in aqueous solutions of chloroacetic acids by Fenton-like treatment using zero-valent iron
