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Competing Reactions of CO2with Cations and Anions in Azolide Ionic Liquids
- Source :
- ChemSusChem. 7:1970-1975
- Publication Year :
- 2014
- Publisher :
- Wiley, 2014.
-
Abstract
- We show that phosphonium azolide ionic liquids of interest for CO2 capture applications react with CO2 both through the normal anion channel and, at elevated temperatures, through a previously unrecognized cation channel. The reaction is caused by an interaction between the anion and cation that allows proton transfer, and involves a phosphonium ylide intermediate. The cation reaction can be mitigated by using ammonium rather than phosphonium cations. Thus, phosphonium and ammonium cations paired with aprotic heterocyclic anions (AHAs) react with CO2 through different mechanisms at elevated temperatures. This work shows that careful consideration of both physical properties and chemical reactivity of ILs based on AHA anions is needed when designing ionic liquids for CO2 separations.
- Subjects :
- Models, Molecular
chemistry.chemical_classification
Proton
Chemistry
General Chemical Engineering
Inorganic chemistry
Molecular Conformation
Ionic Liquids
Carbon Dioxide
Ammonium compounds
Ion
chemistry.chemical_compound
Organophosphorus Compounds
General Energy
Adsorption
Ylide
Ammonium Compounds
Ionic liquid
Environmental Chemistry
General Materials Science
Ammonium
Phosphonium
Subjects
Details
- ISSN :
- 18645631
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- ChemSusChem
- Accession number :
- edsair.doi.dedup.....fc9679dd1fb75b367d0076005ef1b882