Carbon Dioxide Capture by Functionalized Solid Amine Sorbents with Simulated Flue Gas Conditions Yamin Liu, Qing Ye, Mei Shen, Jingjin Shi, Jie Chen, Hua Pan, Yao Shi *
Institute of Industrial Ecology and Environment, Department of Chemical and Biological Engineering,
Zhejiang University (Yuquan Campus)
Hangzhou 310027, P. R. China
* Corresponding author. e-mail:
[email protected] (Y. Shi).
Phone: +86-571-88273591; Fax: +86-571-88273693
Supporting Information Contents: The explanation of Equation 1 Supplemental Tables S1-S4 Supplemental Figure S1-S3 Supplemental Reference
S1
The explanation of Equation 1 Adsorption capacity of CO2 on adsorbents (1 g） ）at a certain time is calculated using Equation 1. Where qa is the adsorption capacity of CO2, mmol g-1; M is the weight of adsorbent, g; Q and Qou are the inlet and outlet gas flow rate, cm3 min-1; C0 and C are influent and effluent CO2 concentrations, vol.%; t denotes as time, min; T0 is 273 K and T is the gas temperature, K; Vm is 22.4 cm3 mmol-1. qa =
T 1 t 1 × (Q × C 0 − Qou × C )dt × 0 × M 0 T Vm
∫
1
And Qou can be calculated using Equation 2.
Qou × (1 − C ) = Q × (1 − C0 )
2
So we can obtain the Equation 3 from Equation 1 and 2. qa =
C − C T0 1 t 1 × Q× 0 × dt × M 0 1− C T Vm
∫
3
Table S1 Isosteric Heats of 10% CO2 Adsorption on KIT-6-TEPA qa (mmol g-1)
-Qst (kJ mol-1)a
r2
293-333K 1.6
51.5
0.978
1.8
49.8
0.994
2.0
42.9
0.996
2.2
39.2
0.994
2.4
38.8
0.995
average
43.8
a: The “-” in front of Qst means that the adsorption process is exothermic. S2
Table S2. Energy requirement of the process adsorption adsorbent (g)
2
adsorbent density (g cm-3)
0.51
adsorption time(min)
20
amount of adsorbed CO2(g)
0.2816 desorption
desorption time(min)
11
amount of desorbed CO2(g)
0.2675
specific heat of adsorbent(J g-1 K)
0.96
energy for heating adsorbent (KJ)
0.0955
adsorption column (KJ)
0.011
desorption heat (KJ)
0.2716
total energy requirement(MJ kg-1CO2)
1.41
Table S3 Energies consumption for CO2 capture from literature and our work sorbent
process
purity
recovery
energy
(%)
(%)
(MJ kg-1CO2)
90
1.2~2.4
(S1)
MEA-MDEA advanced amine 90
Ref.
technologies UOP13X
VSA
95
67
1.1
(S2)
Zeolite 13X
PSA
90
85
1.7
(S3)
Zeolite 5A
TSA
94
83
4.4
(S4)
KIT-6-TEPA
VTSA
98
95
1.41
This work
S3
Table S4. Comparisons of gas conditions between liquid amine absorption and KIT-6-TEPA adsorption Temperature
RH
SO2
NOx
(K)
(%)
(ppm)
(ppm)
Liquid amine
≤313
≤100
≤10
≤400
(S1)
KIT-6-TEPA adsorption
313~353
≤100
≤100
≤400
This work
Figure S1. Schematic drawing for CO2 adsorption experimental system
S4
Ref.
Figure S2. Regression lines of lnP versus 1/T under various qa
Figure S3. Conceived schematic of multipollutant control including CO2 adsorption unit in a power plant
S5
Supplemental Reference (S1)
Aroonwilas, A.; Veawab, A. Integration of CO2 Capture Unit Using Blended MEA-AMP Solution Into Coal-Fired Power Plants. Greenhouse Gas Control Technologies. 9. 2009, 1, 4315-4321.
(S2) Zhang, J.; Webley, P. A. Cycle Development and Design for CO2 Capture from Flue Gas by Vacuum Swing Adsorption. Environ. Sci. Technol. 2008, 42，563-569. (S3) Agarwal, A.; Biegler, L. T.; Zitney, S. E. A Superstructure-Based Optimal Synthesis of PSA Cycles for Post-Combustion CO2 Capture. Aiche J. 2010, 56, 1813-1828. (S4) Merel, J.; Clausse, M.; Meunier, F. Experimental Investigation on CO2 Post-Combustion Capture by Indirect Thermal Swing Adsorption Using 13x and 5a Zeolites. Ind. Eng. Chem. Res. 2008, 47 ，209-215. (S5) Rao, A. B.; Rubin, E. S. A Technical, Economic, and Environmental Assessment of Amine-based CO2 Capture Technology for Power Plant Greenhouse Gas Control. Environ. Sci. Technol. 2002, 36，4467-4475.
S6
