Carbon Dioxide Capture by an Amine Functionalized Ionic Liquid: Fundamental Differences of Surface and Bulk Behavior

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Niedermaier I, Bahlmann M, Papp C, Kolbeck C, Wei W, Krick Calderon S, Grabau M, Schulz P, Wasserscheid P, Steinrück HP, Maier F
Zeitschrift: Journal of the American Chemical Society
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2014
Band: 136
Seitenbereich: 436-441
ISSN: 0002-7863


Abstract


Carbon dioxide (CO2) absorption by the amine-functionalized ionic liquid (IL) dihydroxyethyl dimethylammonium taurinate at 310 K was studied using surface- and bulk-sensitive experimental techniques. From near-ambient pressure X-ray photoelectron spectroscopy at 0.9 mbar CO2, the amount of captured CO2 per mole of IL in the near-surface region is quantified to similar to 0.58 mol, with similar to 0.15 mol in form of carbamate dianions and similar to 0.43 mol in form of carbamic acid. From isothermal uptake experiments combined with infrared spectroscopy, CO2 is found to be bound in the bulk as carbamate (with nominally 0.5 mol of CO2 bound per 1 mol of IL) up to similar to 2.5 bar CO2, and as carbamic acid (with nominally 1 mol CO2 bound per 1 mol IL) at higher pressures. We attribute the fact that at low pressures carbamic acid is the dominating species in the near-surface region, while only carbamate is formed in the bulk, to differences in solvation in the outermost IL layers as compared to the bulk situation.



FAU-Autoren / FAU-Herausgeber

Bahlmann, Matthias
Lehrstuhl für Chemische Reaktionstechnik
Grabau, Mathias
Lehrstuhl für Physikalische Chemie II
Kolbeck, Claudia Dr.
Lehrstuhl für Physikalische Chemie II
Krick Calderon, Sandra
Lehrstuhl für Physikalische Chemie II
Maier, Florian Dr.
Lehrstuhl für Physikalische Chemie II
Niedermaier, Inga
Lehrstuhl für Physikalische Chemie II
Papp, Christian PD Dr.
Lehrstuhl für Physikalische Chemie II
Schulz, Peter Dr.
Lehrstuhl für Chemische Reaktionstechnik
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik


Zitierweisen

APA:
Niedermaier, I., Bahlmann, M., Papp, C., Kolbeck, C., Wei, W., Krick Calderon, S.,... Maier, F. (2014). Carbon Dioxide Capture by an Amine Functionalized Ionic Liquid: Fundamental Differences of Surface and Bulk Behavior. Journal of the American Chemical Society, 136, 436-441. https://dx.doi.org/10.1021/ja410745a

MLA:
Niedermaier, Inga, et al. "Carbon Dioxide Capture by an Amine Functionalized Ionic Liquid: Fundamental Differences of Surface and Bulk Behavior." Journal of the American Chemical Society 136 (2014): 436-441.

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Zuletzt aktualisiert 2018-07-08 um 04:59