Solubility of CO2 in three cellulose‐dissolving ionic liquids

The solubility of CO2 in three cellulose‐dissolving ionic liquids (1‐ethyl‐3‐methylimidazolium diethylphosphate, [Emim][DEP], 1‐allyl‐3‐methylimidazolium chloride, [Amim][Cl], and 1‐butyl‐3‐methylimidazolium chloride, [Bmim][Cl]) at temperatures within 298 and 356 K and pressures up to 6.5 MPa was d...

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Bibliographic Details
Published in:AIChE journal 2020-07, Vol.66 (7), p.n/a
Main Authors: Pérez, Eduardo, Pablo, Laura, Segovia, José J., Moreau, Alejandro, Sánchez, Francisco A., Pereda, Selva, Bermejo, María D.
Format: Article
Language:English
Subjects:
Carbon dioxide
Cellulose
Chlorides
CO2 solubility
Equations of state
extended Henry's law correlation
GC‐EOS
Henrys law
imidazolium‐based ionic liquids
Interaction parameters
Ionic liquids
Ions
Solubility
Solvents
static isochoric cell
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Summary:The solubility of CO2 in three cellulose‐dissolving ionic liquids (1‐ethyl‐3‐methylimidazolium diethylphosphate, [Emim][DEP], 1‐allyl‐3‐methylimidazolium chloride, [Amim][Cl], and 1‐butyl‐3‐methylimidazolium chloride, [Bmim][Cl]) at temperatures within 298 and 356 K and pressures up to 6.5 MPa was determined using a Van Ness‐type apparatus (static isochoric). It was demonstrated that this device can work in isothermal and isoplethal modes, being the latter faster and more precise. Moreover, it was possible to determine CO2 solubilities in metastable liquid [Bmim][Cl]. Experimental data were modeled using the Extended Henry's law correlation and the group contribution equation of state. New parameters for the binary interaction of CO2 with ionic liquid groups were calculated.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.16228