2
0
2017
zha
li
1
journal
Original
Zhang, K.[Kai]
Li, H.[Haomin]
Ren, S.[Shuhang]
Wu, W.[Weize]
Bao, Y.[Yuyun]
J. Chem. Eng. Data
2017
2020-09-29
Specific Heat Capacities of Two Functional Ionic Liquids and Two Functional Deep Eutectic Solvents for the Absorption of SO2
The specific heat capacities (Cp) of four absorbents (1,1,3,3-tetramethlylguanidinium lactate, monoethanolammonium lactate, betaine-ethylene glycol, and l-carnitine-ethylene glycol), which can chemically absorb sulfur dioxide (SO2) with low concentrations, were measured by a Calvet BT 2.15 calorimeter in a temperature range of 318.15 K 363.15 K. The measured specific heat capacities as a function of temperature were correlated with a second-order empirical polynomial equation. The result indicates that the equation can accurately fit the measured specific heat capacities. All the measured specific heat capacities increase with increasing temperature. 1,1,3,3-Tetramethlylguanidinium lactate has the lowest specific heat capacity. The measured specific heat capacities of the four absorbents are lower than that of water, which is beneficial to the desulfurization process.
Specific heat capacity
Functional ionic liquid
Functional deep eutectic solvent
SO2 absorbent
Calorimeter
10.1021/acs.jced.7b00102
9
62
2708-2712
1
InChI=1S/C2H7NO/c3-1-2-4/h4H,1-3H2
HZAXFHJVJLSVMW-UHFFFAOYSA-N
2-aminoethan-1-ol
2-aminoethanol
MEA
ethanolamine
monoethanolamine
C2H7NO
1
Commercial source
1
99
2
Stated by supplier
2
InChI=1S/C5H13N3/c1-7(2)5(6)8(3)4/h6H,1-4H3
KYVBNYUBXIEUFW-UHFFFAOYSA-N
1,1,3,3-tetramethylguanidine
guanidine, 1,1,3,3-tetramethyl-
C5H13N3
1
Commercial source
1
99
2
Stated by supplier
3
InChI=1S/C3H6O3/c1-2(4)3(5)6/h2,4H,1H3,(H,5,6)
JVTAAEKCZFNVCJ-UHFFFAOYSA-N
2-hydroxypropanoic acid
(.+-.)-lactic acid
.alpha.-hydroxypropanoic acid
.alpha.-hydroxypropionic acid
2-hydroxypropionic acid
biolac
chem-cast
dl-lactic acid
lactic acid
milk acid
propanoic acid, 2-hydroxy-
tonsillosan
C3H6O3
1
Commercial source
1
98
2
Stated by supplier
4
InChI=1S/C5H11NO2/c1-6(2,3)4-5(7)8/h4H2,1-3H3
KWIUHFFTVRNATP-UHFFFAOYSA-N
(trimethylammonio)acetate
(carboxymethyl)trimethylammonium hydroxide inner salt
betaine
C5H11NO2
1
Commercial source
1
99
2
Stated by supplier
5
InChI=1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
1,2-ethanediol
1,2-dihydroxyethane
ethane-1,2-diol
ethylene glycol
C2H6O2
1
Commercial source
1
99
2
Stated by supplier
6
InChI=1S/C7H15NO3/c1-8(2,3)5-6(9)4-7(10)11/h6,9H,4-5H2,1-3H3/t6-/m1/s1
PHIQHXFUZVPYII-ZCFIWIBFSA-N
(R)-3-hydroxy-4-(trimethylammonio)butanoate
L-Carnitine
C7H15NO3
1
Commercial source
1
99
2
Stated by supplier
7
InChI=1S/C5H11NO3/c1-4(8)5(9)6-2-3-7/h4,7-8H,2-3H2,1H3,(H,6,9)
RZCHTMXTKQHYDT-UHFFFAOYSA-N
2-hydroxy-N-(2-hydroxyethyl)propanamide
C5H11NO3
1
Synthesized by the authors
1
99
2
Estimated by the compiler
1
5
1
Principal objective of the work
ZDB
ZDB
7/14/2017
1
Molar heat capacity at constant pressure, J/K/mol
Extra sensitive DSC
Liquid
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Pressure, kPa
Liquid
100.59
5
1
Temperature, K
Liquid
1
323.15
5
1
151.56966528
4
1
10.17912576
1
333.15
5
1
155.23166784
4
1
8.93776896
1
343.15
5
1
158.5833312
4
1
9.12397248
1
353.15
5
1
161.31431616
4
1
9.310176
1
363.15
5
1
164.85218304
4
1
9.55844736
2
4
1
5
1
Principal objective of the work
ZDB
ZDB
7/14/2017
1
Molar heat capacity at constant pressure, J/K/mol
Extra sensitive DSC
Liquid
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Pressure, kPa
Liquid
100.59
5
2
Mole fraction
4
Liquid
0.25
2
1
Temperature, K
Liquid
1
318.15
5
1
164.794833175
4
1
14.181607825
1
323.15
5
1
167.1457949
4
1
11.906483575
1
328.15
5
1
168.51086945
4
1
10.238059125
1
333.15
5
1
170.255131375
4
1
10.3138966
1
338.15
5
1
171.6960434
4
1
10.46557155
1
343.15
5
1
172.985280475
4
1
10.6172465
1
348.15
5
1
174.198680075
4
1
10.6172465
1
353.15
5
1
175.18456725
4
1
10.6172465
1
358.15
5
1
176.473804325
4
1
10.76892145
1
363.15
5
1
177.535528975
4
1
10.844758925
3
6
1
5
1
Principal objective of the work
ZDB
ZDB
7/14/2017
1
Molar heat capacity at constant pressure, J/K/mol
Extra sensitive DSC
Liquid
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Pressure, kPa
Liquid
100.59
5
2
Mole fraction
6
Liquid
0.25
2
1
Temperature, K
Liquid
1
318.15
5
1
180.99668166
4
1
15.45940947
1
323.15
5
1
183.94960257
4
1
13.02759225
1
328.15
5
1
185.947166715
4
1
11.29057995
1
333.15
5
1
188.205282705
4
1
11.377430565
1
338.15
5
1
190.20284685
4
1
11.551131795
1
343.15
5
1
192.11356038
4
1
11.724833025
1
348.15
5
1
193.85057268
4
1
11.724833025
1
353.15
5
1
195.327033135
4
1
11.898534255
1
358.15
5
1
197.411447895
4
1
11.98538487
1
363.15
5
1
199.322161425
4
1
12.1590861
4
1
1
3
1
7
1
Principal objective of the work
ZDB
ZDB
7/14/2017
1
Molar heat capacity at constant pressure, J/K/mol
Extra sensitive DSC
Liquid
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Pressure, kPa
Liquid
100.59
5
2
Mole fraction
1
Liquid
0.443
3
3
Mole fraction
7
Liquid
0.115
3
1
Temperature, K
Liquid
1
318.15
5
1
155.90691093698
4
1
13.31413788708
1
323.15
5
1
160.18058482666
4
1
11.34167301492
1
328.15
5
1
163.22146817124
4
1
9.94451039714
1
333.15
5
1
166.67328169752
4
1
10.10888246982
1
338.15
5
1
169.96072315112
4
1
10.2732545425
1
343.15
5
1
173.24816460472
4
1
10.51981265152
1
348.15
5
1
176.53560605832
4
1
10.6841847242
1
353.15
5
1
179.65867543924
4
1
10.76637076054
1
358.15
5
1
183.52141914722
4
1
11.01292886956
1
363.15
5
1
187.46634889154
4
1
11.0951149059
5
3
1
2
1
Principal objective of the work
EP
EP
7/14/2017
1
Molar heat capacity at constant pressure, J/K/mol
Extra sensitive DSC
Liquid
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid
1
Pressure, kPa
Liquid
100.59
5
2
Mole fraction
3
Liquid
0.5
2
1
Temperature, K
Liquid
1
318.15
5
1
176.92970656
4
1
15.08623368
1
323.15
5
1
183.7031176
4
1
13.03368488
1
328.15
5
1
189.24499936
4
1
11.39164584
1
333.15
5
1
195.19739088
4
1
11.90478304
1
338.15
5
1
200.6366452
4
1
12.11003792
1
343.15
5
1
205.87064464
4
1
12.62317512
1
348.15
5
1
211.00201664
4
1
12.82843
1
353.15
5
1
215.92813376
4
1
13.13631232
1
358.15
5
1
221.1621332
4
1
13.54682208
1
363.15
5
1
226.19087776
4
1
13.8547044