On the chemical fixation of supercritical carbon dioxide with epoxides catalyzed by ionic salts: an in situ FTIR and Raman study - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Catalysis science and Technology Année : 2013

On the chemical fixation of supercritical carbon dioxide with epoxides catalyzed by ionic salts: an in situ FTIR and Raman study

Résumé

A series of ionic salts have been investigated to catalyze the coupling reaction between epoxide and carbon dioxide at T = 80 degrees C and P = 8 MPa. Among them, we focused particularly on tetrabutylammonium, imidazolium and guanidinium salts. The kinetics of the synthesis was monitored in situ using both FTIR and Raman spectroscopy. For a given reaction time, the best yields were obtained with 1,5,7-triaza-bicyclo[4.4.0] dec-5-enium bromide (TBD.HBr) and 1-methyl-3-methylimidazolium iodide (MMImI) and both have not been investigated in detail in the literature before. Thanks to this catalyst screening, we have verified how some functional groups of the catalyst can activate the epoxide and the CO2 molecule enabling us to go further in the mechanism comprehension of this reaction. Due to its easier and less expensive synthesis than other ionic liquids, we focused more particularly on TBD.HBr that also offers a good conversion rate even at low pressure (80 degrees C and 1 MPa).
Fichier non déposé

Dates et versions

hal-00819001 , version 1 (29-04-2013)

Identifiants

Citer

Stéphanie Foltran, Jérôme Alsarraf, Frédéric Robert, Yannick Landais, Eric Cloutet, et al.. On the chemical fixation of supercritical carbon dioxide with epoxides catalyzed by ionic salts: an in situ FTIR and Raman study. Catalysis science and Technology, 2013, 3 (4), pp.1046-1055. ⟨10.1039/c2cy20784b⟩. ⟨hal-00819001⟩
102 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More