Online NMR spectroscopic study of species distribution in MEA–H2O–CO2 and DEA–H2O–CO2

Experimental study into carbon dioxide solubility and species distribution in aqueous alkanolamine solutions

“…This value is close to previous data by Jakobsen et al [9]: 0.76 (0.79) at a CO 2 loading of 0.59 and at 40C (20C) in 30 wt% aqueous MEA solutions. Böttinger et al [10] also carried out quantitative speciation of 30 wt% aqueous MEA solutions by online NMR spectroscopy where the carbamate yield was 0.57 at a CO 2 loading of 0.77 and at 40C. These results show that for aqueous MEA solutions the carbamate products dominate the carbonate and carbamate products even at a relatively high CO 2 loading.…”

Capture of Carbon Dioxide by Cucurbit[7]uril Complex

“…(2), whereas decomposition of carbamate with excess of CO 2 also leads to bicarbonate as in Eq. (3) [2]. The reactions of amines with CO 2 in water for a long time are inclined to form bicarbonate as primary product, however the conversions are hardly complete with a little side product of carbamate, for they are equilibrium reactions.…”

“…Traditional sorbents of CO 2 include aqueous amines, which react with CO 2 rapidly at room temperature and can be released easily by gentle heating (60-110 o C) or simply by addition of HCl or TFA [2]. This reversible conversion leads to controllable capture and release of CO 2 from gas streams.…”

PVTxy properties of CO2 mixtures relevant for CO2 capture, transport and storage: Review of available experimental data and theoretical models

“…Based on the different oil industry and fuel conversion processes, the possible impurities are summarized in Table 2. Recently, comprehensive reviews on the experimental PVTxy-data of CO 2 /H 2 O and CO 2 /amines have been published [6][7][8][9][10][11][12]. In addition, an extensive review of the available experimental data and models for CO 2 -hydrates has been presented previously [13].…”