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. 2022 Oct 19;122(24):17647–17695. doi: 10.1021/acs.chemrev.2c00140

Table 4. Zeolitic Adsorbents for the CO2/N2 Separationa.

Material Structure Si/Al ratio Estimated framework negative chargeb T (°C) Q0.15 bar (mmol/g) Q1bar (mmol/g) WC0.15–0.07 (mmol/g)c
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(kJ/mol)		 ref·
5A LTA 1 0.5 25 3.80 4.67 0.58 31 8.6 - (521)
NaKA LTA 1 0.5 25 2.38 3.38 0.47 172d - - (561)
SAPO-RHO RHO - <0.11 0 1.79 3.61 0.60 57 26d 32.5 (507)
SAPO-RHO RHO - <0.11 35 0.73 2.13 0.33 - - 32.5 (507)
Na-SAPO-RHO RHO - <0.18 25 2.42 3.45 0.44 196d 37 42.5 (263)
Na-SAPO-RHO RHO - <0.18 25 - 0.98f - 107 - 42.5 (263)
PST-29 PWN 4.5 0.18 25 2.82 4.26 0.44 31 7.3 - (502)
NaTEA-ECR-18 PAU 3.5 0.22 25 2.26 2.99 0.25 35 9d 53.0 (275)
NaTEA-ZSM-25 MWF 3.4 0.23 25 2.97 3.50 0.27 27 10d 65.0 (275)
NaTEA-PST-20 - 3.1 0.24 25 2.11 3.17 0.52 33 10d 44.0 (275)
CsTEA-ZSM-25 MWF 3.4 0.23 25 1.41 2.14 0.34 47d 9 27.6 (276)
CsTEA-PST-20 - 3.1 0.24 25 1.50 2.23 0.31 47d 11 35.0 (276)
K-MER-2.3 MER 2.3 0.30 25 2.21 2.99 0.26 95d 13 30 (264)
13X FAU 1.2 0.45 25 3.01 4.69 0.62 67 18.4 37.2 (522)
Si-FER FER - 0 30 0.54 1.61 0.25 16.5 9.0 27.2 (554)
Si-MFI MFI - 0 30 0.38 1.66 0.19 13.3 10.7 24.2 (554)
Si-STT STT - 0 30 0.42 2.02 0.21 17.7 16.0 23.6 (554)
Si-CHA CHA - 0 30 0.39 1.92 0.20 15.4 12.3 23 (554)
Li-SSZ-13–6 CHA 6 0.14 30 3.52 5.09 0.64 29.1 9.5 44.2 (555)
Na-SSZ-13–6 CHA 6 0.14 30 3.54 4.95 0.63 33.5 9.9 43.0 (555)
r1.2KCHA CHA 1.2 0.45 0 1.75 2.11 0.29 >100 80d - (258)
r1.9KCHA CHA 1.9 0.34 0 0.62 0.81 0.14 >100 85 - (262)
r1.9KCHA CHA 1.9 0.34 30 1.13 1.49 0.20 >100 >100 - (262)
AlPO-18 AEI - 0 0 0.53 2.11 0.27 20.0 13.8 - (556)
AlPO-18 AEI - 0 20 0.27 1.36 0.14 14.1 13.1 - (556)
AlPO-18e AEI - 0 25 0.34 1.86 0.17 15.7 23.6 26.8 (333)
SAPO-56 AFX - <0.15 0 2.77 5.46 0.86 33 10.5d 36.0 (507)
SAPO-56 AFX - <0.15 35 1.06 2.81 0.42 - - 36.0 (507)
AlPO-53 AEN - 0 0 0.86 1.92 0.37 55 25 - (556)
AlPO-53 AEN - 0 20 0.41 1.38 0.20 81 40 - (556)
AlPO-53e AEN - 0 25 0.33 1.28 0.15 80 84 33.9 (333)
AlPO-GISe GIS - 0 25 1.94 3.65 0.89 132 163 36.0 (333)
AlPO-ATTe ATT - 0 25 1.28 2.45 0.49 76 84 34.0 (333)
AlPO-SIVe SIV - 0 25 1.24 2.90 0.55 75 74 33.9 (333)
a

Adsorption isotherm values have been extracted from the references where they were not explicitly displayed. Selectivities have been calculated therefrom, unless otherwise specified.

b

The estimated framework negative charge gives analogous information as the Si/Al ratio and is defined in ref (152). Materials with values above 0.33 are considered to be highly polar.

c

The working capacities have been calculated at CO2 pressures between 0.15 and 0.07 bar, i.e. VSA conditions.

d

These selectivities have been directly taken from their respective references.

e

Simulation results data of CO2/N2 15:85 mixture.333

f

Breakthrough data of a CO2/N2 15:85 mixture, total pressure 1 bar.263