Research Article
Screening of Pure ILs and DESs for CO2 Separation, N2O Separation, and H2S Separation Processes
Table 2
Henry’s constant of X gas (Hx) in physical absorbents, the density at 298.15 K (ρ298.15), and the isobaric heat capacity (Cp) of CO2 absorbents.
| Absorbents | T (K) | Hx (bar) | Kx | ρ298.15 (g·cm−3) | Cp (J·mol−1·K−1) |
| CO 2absorbents | [Emim][BF4] | 298.1–343.0 | 81.1–162.1 [24] | | 1.283 [25–27] | 308.1–324.5 [28–31] | [C2OHmim][BF4] | 303.2–353.2 | 108.0–198.0 [32] | | 1.330 [33, 34] | 439.0–475.0 [28] | [Emim][PF6] | 303.2–343.2 | 61.2–138.7 [11] | | 1.468 [35] | 350.0–368.4 [36] | [Emim][NTf2] | 283.1–343.1 | 25.3–77.1 [37, 38] | | 1.518 [39–41] | 501.2–530.4 [28, 42, 43] | [Emmim][NTf2] | 283.1–323.1 | 28.6–60.5 [37] | | 1.487 [44] | 481.4–498.8 [44] | [Emim][OTf] | 303.2–343.2 | 83.0–158.4 [11] | | 1.385 [45–47] | 380.1–394.6 [48] | [Emim][EtSO4] | 283.3–343.1 | 62.1–184.7 [11] | | 1.237 [49, 50] | 365.0–411.0 [51] | [Emim][Et2PO4] | 313.2–333.2 | 69.9–96.6 [52] | | 1.145 [53] | 470.0–486.0 [54] | [Bmim][BF4] | 283.1–344.3 | 40.8–123.4 [37, 55] | | 1.201 [56] | 357.8–386.3 [57] | [Bmim][PF6] | 283.1–348.2 | 38.7–121.1 [58] | | 1.367 [59] | 398.5–435.1 [60] | [Bmim][NTf2] | 293.1–323.1 | 29.0–49.1 [61] | | 1.436 [62] | 564.1–581.7 [60] | [Bmim][DCA] | 298.2–333.3 | 71.9–102.3 [11] | | 1.060 [63] | 376.6–389.3 [64] | [Bmim][TFA] | 298.2–333.4 | 57.2–90.0 [11] | | 1.216 [65] | 407.9–424.9 [66] | [Bmim][CH3SO4] | 293.2–413.2 | 74.5–335.8 [11] | | 1.208 [67] | 373.0–424.3 [68] | [Bmim][OcSO4] | 313.2–343.2 | 64.8–94.0 [11] | | 1.068 [40] | 655.4–696.5 [69] | [Hmim][BF4] | 307.5–322.2 | 62.6–86.2 [70] | | 1.145 [71] | 435.9–443.4 [72] | [Hmim][PF6] | 298.2–323.2 | 49.0–80.6 [11] | | 1.291 [73] | 423.5–438.7 [74] | [Hmim][NTf2] | 293.2–413.2 | 27.8–122.4 [75] | | 1.372 [76] | 626.2–704.0 [28] | [Omim][BF4] | 303.0–323.0 | 53.9–75.6 [61] | | 1.103 [71] | 501.3–513.6 [77] | [Omim][NTf2] | 303.2–353.2 | 26.0–44.2 [11] | | 1.321 [65] | 741.0–817.0 [28] | [C12 mim][NTf2] | 298.2–323.2 | 32.0–42.0 [11] | | 1.278 [78] | 755.3–774.9 [79] | [BmPy][FAP] | 303.2–343.2 | 25.7–46.1 [11] | | 1.583 [80] | 773.0–803.0 [28] | [BmPy][NTf2] | 303.8–344.2 | 36.6–67.8 [11] | | 1.394 [81] | 592.2–620.0 [32] | [Bmpy][OTf] | 303.4–373.2 | 40.2–205.6 [11] | | 1.253 [82] | 437.8–497.1 [82] | [Bpy][NTf2] | 298.2–333.2 | 32.0–51.7 [83] | | 1.448 [84] | 581.5–597.6 [59] | [Hmpy][NTf2] | 283.2–333.2 | 25.4–46.2 [11] | | 1.362 [85] | 612.1–652.1 [86] | [N4111][NTf2] | 282.9–343.0 | 23.8–70.0 [11] | | 1.392 [87] | 550.2–586.2 [88] | ChCl/urea (1 : 2) | 313.0–333.0 | 123.0–182.0 [89] | | 1.360 [90–92] | 183.2–186.4 [93] | ChCl/EG (1 : 2) | 303.2–343.2 | 243.6–600.5 [94] | | 1.117 [95] | 190.8–202.1 [93] | ChCl/Gly (1 : 2) | 303.2–343.2 | 120.0–344.9 [96] | | 1.191 [95, 97] | 237.7–250.3 [93] | [Emim][Ac] | 298.1–348.1 | 4.3–6.3 [11] | 285.0–808.0 [11] | 1.099 [98] | 322.6–343.0 [99] | [Eeim][Ac] | 283.1–348.1 | 4.3–6.3 [11] | 140.0–18.0 [11] | 1.076 [100] | 442.6–491.8 [99] | [Bmim][Ac] | 298.1–348.1 | 4.0–7.0 [11] | 167.0–39.0 [11] | 1.052 [101] | 381.0–414.0 [66] | Cho[Pro]/PEG200(1 : 2) | 298.1–348.1 | 2.8–3.3 [12, 102] | 1.3–1.6 [12, 102] | 1.330 [103] | 358.3–380.4 [102] |
| N 2O absorbents | [Bmpy][FAP] | 303.1–343.2 | 0.023–0.042 [104] | | 1.583 [105] | 799.0–812.0 [106] | [P66614][FAP] | 303.1–343.2 | 0.043–0.070 [104] | | 1.182 [80] | 1540.0–1580.0 [107] | [Bmim][FAP] | 303.1–343.2 | 0.026–0.042 [108] | | 1.624 [109] | 737.3–757.8 [110] | [Hmim][FAP] | 303.1–343.3 | 0.022–0.043 [108] | | 1.550 [111] | 764.0–781.2 [74] | [Bmim][NTf2] | 298.0–348.0 | 0.002–0.404 [112] | | 1.437 [113] | 589.1–600.3 [114] | [Bmim][BF4] | 298.0–348.0 | 0.001–0.208 [112] | | 1.201 [115] | 385.6–394.9 [77] | [Bmim][DCA] | 293.0–348.0 | 0.001–0.247 [112] | | 1.061 [32] | 394.1–403.1 [116] | [Bmim][Ac] | 293.0–348.0 | 0.001–0.207 [112] | | 1.053 [117] | 391.6–402.1 [118] |
| H 2S absorbents | [Bmim][BF4] | 303.1–343.1 | 15.5–33.4 [119] | | 1.204 [120] | 363.1–368.7 [46] | [Bmim][PF6] | 303.1–343.1 | 18.6–33.8 [119] | | 1.370 [121] | 407.7–413.1 [121] | [Bmim][NTf2] | 303.1–343.1 | 13.7–26.6 [119] | | 1.436 [60] | 567.3–572.8 [121] | [Hmim][BF4] | 303.1–343.1 | 12.5–25.7 [122] | | 1.145 [123] | 427.8–433.0 [46] | [Hmim][PF6] | 303.1–343.1 | 17.9–39.7 [122] | | 1.294 [124] | 469.0–476.0 [125] | [Hmim][NTf2] | 303.1–343.1 | 17.4–40.6 [122] | | 1.371 [126] | 631.6–632.9 [127] | [Emim][NTf2] | 303.1–353.1 | 14.8–31.6 [128] | | 1.518 [25] | 525.0–529.0 [106] | [Emim][EtSO4] | 303.1–353.1 | 60.7–133.0 [129] | | 1.237 [130] | 394.4–399.3 [106] | [Omim][NTf2] | 303.1–353.1 | 9.9–19.5 [123] | | 1.323 [132] | 733.0–748.0 [106] | [Omim][PF6] | 303.1–353.1 | 12.2–25.5 [120] | | 1.235 [133] | 536.0–544.0 [125] |
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