2
0
2011
dug
roc
0
journal
Original
Dugas, R. E.[Ross E.]
Rochelle, G. T.[Gary T.]
J. Chem. Eng. Data
2011
2020-09-29
CO2 Absorption Rate into Concentrated Aqueous Monoethanolamine and Piperazine
The CO2 equilibrium partial pressure and liquid film mass transfer coefficient (kg') in (7, 9, 11, and 13) m monoethanolamine (MEA) and (2, 5, 8, and 12) m piperazine (PZ) were measured in a wetted wall column. Also examined was 7 m MEA/2 m PZ. Absorption and desorption experiments were performed at (40, 60, 80, and 100) deg C over a range of CO2 loading. Amine concentration does not affect the CO2 partial pressure of PZ or MEA solutions as a function of CO2 loading with less than 0.45 mols CO2/mol alkalinity. Changes in amine concentration and temperature often do not affect the measured value of kg'. At higher temperature and CO2 loading in PZ, the diffusion of reactants and products limits CO2 transfer, and kg' is depressed. PZ (8 m) exhibits a 70 % greater CO2 capacity than 7 m MEA and a 50 % greater CO2 capacity than 11 m MEA. kg' decreases by a factor of 30 in aqueous MEA with 0.23 to 0.50 CO2 loading. kg' decreases by a factor of 20 in aqueous PZ with 0.21 to 0.41 CO2 loading. PZ is shown to absorb CO2 2 to 3 times faster than MEA.
10.1021/je101234t
5
56
2187-2195
1
InChI=1S/CO2/c2-1-3
CURLTUGMZLYLDI-UHFFFAOYSA-N
carbon dioxide
CO2
1
Commercial source
1
99
2
Estimated by the compiler
2
InChI=1S/H2O/h1H2
XLYOFNOQVPJJNP-UHFFFAOYSA-N
water
H2O
1
Commercial source
1
99.8
3
Estimated by the compiler
3
InChI=1S/C2H7NO/c3-1-2-4/h4H,1-3H2
HZAXFHJVJLSVMW-UHFFFAOYSA-N
2-aminoethan-1-ol
2-aminoethanol
MEA
ethanolamine
monoethanolamine
C2H7NO
1
notDescribed
4
InChI=1S/C4H10N2/c1-2-6-4-3-5-1/h5-6H,1-4H2
GLUUGHFHXGJENI-UHFFFAOYSA-N
piperazine
diethylenediamine
hexahydro-1,4-diazine
hexahydropyrazine
C4H10N2
1
notDescribed
1
1
1
3
1
2
1
Principal objective of the work
RDC
XXX
6/10/2011
1
Vapor or sublimation pressure, kPa
Closed cell (Static) method
Liquid
Direct value, X
2
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Gas
1
Temperature, K
Liquid
2
Molality, mol/kg
1
Liquid
3
Molality, mol/kg
3
Liquid
1
313.15
3
2
1.764
4
3
7
1
1
0.0157
3
1
0.0019
1
313.15
3
2
2.079
4
3
9
1
1
0.0104
3
1
0.0013
1
313.15
3
2
2.457
4
3
7
1
1
0.077
2
1
0.008
1
313.15
3
2
2.871
4
3
11
2
1
0.014
2
1
0.002
1
313.15
3
2
2.916
4
3
9
1
1
0.034
2
1
0.004
1
313.15
3
2
3.024
4
3
7
1
1
0.465
3
1
0.047
1
313.15
3
2
3.276
4
3
13
2
1
0.0123
3
1
0.0015
1
313.15
3
2
3.438
4
3
9
1
1
0.107
3
1
0.011
1
313.15
3
2
3.472
4
3
7
1
1
4.216
4
1
0.423
1
313.15
3
2
3.883
4
3
11
2
1
0.067
2
1
0.007
1
313.15
3
2
3.969
4
3
9
1
1
0.417
3
1
0.042
1
313.15
3
2
4.464
4
3
9
1
1
5.354
4
1
0.537
1
313.15
3
2
4.708
4
3
11
2
1
0.434
3
1
0.044
1
313.15
3
2
4.836
4
3
13
2
1
0.084
2
1
0.009
1
313.15
3
2
5.071
4
3
11
2
1
1.509
4
1
0.152
1
313.15
3
2
5.655
4
3
13
2
1
0.491
3
1
0.05
1
313.15
3
2
6.526
4
3
13
2
1
8.792
4
1
0.881
1
333.15
3
2
1.764
4
3
7
1
1
0.109
3
1
0.012
1
333.15
3
2
2.079
4
3
9
1
1
0.061
2
1
0.007
1
333.15
3
2
2.457
4
3
7
1
1
0.66
3
1
0.067
1
333.15
3
2
2.871
4
3
11
2
1
0.096
2
1
0.01
1
333.15
3
2
2.916
4
3
9
1
1
0.263
3
1
0.028
1
333.15
3
2
3.024
4
3
7
1
1
3.434
4
1
0.345
1
333.15
3
2
3.276
4
3
13
2
1
0.1
3
1
0.011
1
333.15
3
2
3.438
4
3
9
1
1
0.892
3
1
0.09
1
333.15
3
2
3.472
4
3
7
1
1
16.157
5
1
1.618
1
333.15
3
2
3.883
4
3
11
2
1
0.634
3
1
0.064
1
333.15
3
2
3.969
4
3
9
1
1
2.862
4
1
0.287
1
333.15
3
2
4.464
4
3
9
1
1
21.249
5
1
2.128
1
333.15
3
2
4.708
4
3
11
2
1
3.463
4
1
0.347
1
333.15
3
2
4.836
4
3
13
2
1
0.694
3
1
0.07
1
333.15
3
2
5.071
4
3
11
2
1
8.171
4
1
0.819
1
333.15
3
2
5.655
4
3
13
2
1
3.859
4
1
0.387
1
333.15
3
2
6.526
4
3
13
2
1
29.427
5
1
2.947
1
353.15
3
2
1.897
4
3
7
1
1
1.053
4
1
0.107
1
353.15
3
2
2.385
4
3
9
1
1
0.979
3
1
0.099
1
353.15
3
2
2.562
4
3
7
1
1
4.443
4
1
0.445
1
353.15
3
2
2.816
4
3
11
2
1
0.86
3
1
0.087
1
353.15
3
2
3.204
4
3
9
1
1
4.797
4
1
0.481
1
353.15
3
2
3.302
4
3
13
2
1
0.873
3
1
0.089
1
353.15
3
2
3.949
4
3
11
2
1
3.923
4
1
0.394
1
353.15
3
2
4.615
4
3
13
2
1
3.964
4
1
0.398
1
373.1
4
2
1.897
4
3
7
1
1
5.297
4
1
0.531
1
373.1
4
2
2.385
4
3
9
1
1
4.94
4
1
0.495
1
373.1
4
2
2.562
4
3
7
1
1
19.008
5
1
1.903
1
373.1
4
2
2.816
4
3
11
2
1
4.274
4
1
0.429
1
373.1
4
2
3.204
4
3
9
1
1
21.534
5
1
2.156
1
373.1
4
2
3.302
4
3
13
2
1
3.876
4
1
0.389
1
373.1
4
2
3.949
4
3
11
2
1
18.657
5
1
1.868
1
373.1
4
2
4.615
4
3
13
2
1
18.406
5
1
1.844
2
4
1
1
1
2
1
Principal objective of the work
RDC
XXX
6/10/2011
1
Vapor or sublimation pressure, kPa
Closed cell (Static) method
Liquid
Direct value, X
2
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
Gas
1
Temperature, K
Liquid
2
Molality, mol/kg
1
Liquid
3
Molality, mol/kg
4
Liquid
1
313.15
3
2
0.96
2
3
2
1
1
0.096
2
1
0.01
1
313.15
3
2
1.264
4
3
2
1
1
0.499
3
1
0.051
1
313.15
3
2
1.408
4
3
2
1
1
1.305
4
1
0.132
1
313.15
3
2
1.644
4
3
2
1
1
7.127
4
1
0.714
1
313.15
3
2
2.26
3
3
5
1
1
0.065
2
1
0.007
1
313.15
3
2
2.99
3
3
5
1
1
0.346
3
1
0.035
1
313.15
3
2
3.54
3
3
5
1
1
1.12
4
1
0.113
1
313.15
3
2
3.696
4
3
8
1
1
0.068
2
1
0.007
1
313.15
3
2
4.02
3
3
5
1
1
4.563
4
1
0.458
1
313.15
3
2
4.88
3
3
8
1
1
0.53
3
1
0.054
1
313.15
3
2
5.76
3
3
8
1
1
1.409
4
1
0.142
1
313.15
3
2
6.464
4
3
8
1
1
8.153
4
1
0.817
1
333.15
3
2
0.96
2
3
2
1
1
0.559
3
1
0.057
1
333.15
3
2
1.264
4
3
2
1
1
2.541
4
1
0.255
1
333.15
3
2
1.408
4
3
2
1
1
5.593
4
1
0.56
1
333.15
3
2
1.644
4
3
2
1
1
25.378
5
1
2.54
1
333.15
3
2
2.26
3
3
5
1
1
0.385
3
1
0.039
1
333.15
3
2
2.99
3
3
5
1
1
1.814
4
1
0.183
1
333.15
3
2
3.54
3
3
5
1
1
5.021
4
1
0.503
1
333.15
3
2
3.696
4
3
8
1
1
0.43
3
1
0.044
1
333.15
3
2
4.02
3
3
5
1
1
17.233
5
1
1.725
1
333.15
3
2
4.88
3
3
8
1
1
2.407
4
1
0.242
1
333.15
3
2
5.544
4
3
12
2
1
0.331
3
1
0.034
1
333.15
3
2
5.76
3
3
8
1
1
7.454
4
1
0.747
1
333.15
3
2
6.464
4
3
8
1
1
30.783
5
1
3.082
1
333.15
3
2
6.936
4
3
12
2
1
1.865
4
1
0.188
1
333.15
3
2
8.496
4
3
12
2
1
6.791
4
1
0.681
1
353.15
3
2
0.956
3
3
2
1
1
2.492
4
1
0.25
1
353.15
3
2
1.296
4
3
2
1
1
12.26
5
1
1.227
1
353.15
3
2
2.38
3
3
5
1
1
2.192
4
1
0.22
1
353.15
3
2
3.21
3
3
5
1
1
9.699
4
1
0.971
1
353.15
3
2
4.048
4
3
8
1
1
3.255
4
1
0.327
1
353.15
3
2
4.624
4
3
8
1
1
9.406
4
1
0.942
1
353.15
3
2
5.328
4
3
12
2
1
2.115
4
1
0.213
1
353.15
3
2
6.96
3
3
12
2
1
9.141
4
1
0.916
1
373.1
4
2
0.956
3
3
2
1
1
9.569
4
1
0.958
1
373.1
4
2
1.296
4
3
2
1
1
39.286
5
1
3.931
1
373.1
4
2
2.38
3
3
5
1
1
8.888
4
1
0.89
1
373.1
4
2
3.21
3
3
5
1
1
36.96
5
1
3.7
1
373.1
4
2
4.048
4
3
8
1
1
13.605
5
1
1.363
1
373.1
4
2
4.624
4
3
8
1
1
32.033
5
1
3.208
1
373.1
4
2
5.328
4
3
12
2
1
7.871
4
1
0.789
1
373.1
4
2
6.96
3
3
12
2
1
33.652
5
1
3.371