Solubilities of CO₂ in Poly(ethylene glycols) from (303.15 to 333.15) K

Abstract

The solubilities of CO 2 in solvent poly-(ethylene glycols) (PEGs) with molecular weights of 150, 200, 300, and 400 were measured over the range of pressure from (100 to 1200) kPa and temperature from (303.15 to 333.15) K. Henry's constant was obtained by linear fitting of the experimental data, and thermodynamic properties of solutions were calculated from the correlation of Henry's constant. It indicates that the solubility of CO 2 increases with increasing molecular weights of PEGs. Henry's constant based on mole fraction and the molality of CO 2 in PEG400 vary from (4.78 to 7.09) MPa and (1.56 to 2.48) MPa•kg•mol −1 from (303.15 to 333.15) K, respectively.

Modelling the reaction mechanism of ribulose‐1,5‐bisphosphate carboxylase/oxygenase and consequences for kinetic parameters

“…In fact, CO 2 is more soluble in polymers like polyethylene glycol (Li et al . ), polymers mimicking proteins (Zheng et al . ) and in protein‐enriched solutions (Descoins et al .…”

Reversible Carbon Dioxide Capture at High Temperatures by Tetraethylenepentamine Acetic Acid and Polyethylene Glycol Mixtures with High Capacity and Low Viscosity

“…[TEPA]Ac should follow the mechanism as shown in Scheme 1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 As shown in Figure 3, the capacities of [TEPA]Ac/PEG-200 mixtures are similar and the mole ratio of CO 2 to [TEPA]Ac is about 1.24 at 353.15 K, which is higher than other IL-based absorbents that reported by other authors even at a higher temperature (Table 1) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 [29]. However, PEG-200 played the role as solvent for [TEPA]Ac and could increase the ef...…”

Absorption of CO2 in lyotropic liquid crystals

“…For L92 samples, the loading obtained was 12.5 g CO 2 /kg sample for 70% L92, 16.7 g CO 2 /kg sample for 100% L92, and 4.8 g for 70% L92-NH 2 . The absorption of samples containing L92 is slightly higher than the absorption of samples with L81, most likely due to the longer PEO blocks in L92, which have affinity for CO 2 and increase the hydrophilicity of the sample [34,36,53]. The VLE data show that all samples follow the same general trend: the partial pressure of CO 2 in the reactor increases linearly as the loading of the samples increases.…”

“…Aravind et al studied the solubility of CO 2 in a series of physical solvents, and concluded that among the solvents tested, Genosorb had the highest CO 2 solubility [33]. Moreover, Li et al studied the solubility of CO 2 in PEOs of different molecular weights [34]. They found that the CO 2 solubility in PEO decreases with increasing temperature and decreasing pressure, and that it increases with increasing molecular weight of PEO [34][35][36].…”