10.1021/acs.energyfuels.9b00952.s001
Xiaojing Li
Xiaojing
Li
Yongchun Zhang
Yongchun
Zhang
Shaoyun Chen
Shaoyun
Chen
Enhancement of CO<sub>2</sub> Desorption from Reinforced
2‑(2-Aminoethylamine) Ethanol Aqueous Solution by Multi-walled
Carbon Nanotubes
American Chemical Society
2019
MWCNT-COOH
multi-walled carbon nanotubes
MWCNT
TPD
FT-IR
characterization results
N 2
BET
XRD
desorption rate
Ethanol Aqueous Solution
CO 2
NH 3
wt
ambient pressure
desorption volume
AEE solution exhibits application feasibility
SEM
CO 2 desorbed
desorption rates
absorption loading
CO 2 Desorption
MWCNT-OH
addition amount
30 min
cyclic absorption capacity
CO 2 desorption rate
Multi-walled Carbon Nanotubes CO 2 desorption
2019-06-17 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Enhancement_of_CO_sub_2_sub_Desorption_from_Reinforced_2_2-Aminoethylamine_Ethanol_Aqueous_Solution_by_Multi-walled_Carbon_Nanotubes/8340767
CO<sub>2</sub> desorption
in 2-(2-aminoethylamine) ethanol (AEE)
aqueous solution promoted by different types of multi-walled carbon
nanotubes (pristine MWCNT, MWCNT-OH, and MWCNT-COOH) was investigated
in a continuous absorption–desorption apparatus. The CO<sub>2</sub> absorption (313 K) and desorption (393 K) processes with
each solid at concentrations of 0.01–0.07 wt % in 2 mol/L AEE
aqueous solution were investigated by comparing CO<sub>2</sub> desorption
rate, desorption volume, and cyclic absorption capacity at ambient
pressure. It was found that each kind of MWCNT can significantly increase
the CO<sub>2</sub> desorption rate comparing to the blank test. The
average desorption rates in 30 min of pristine MWCNT, MWCNT-OH, and
MWCNT-COOH were enhanced by 26.7% (0.05 wt %), 32.4% (0.05 wt %),
and 29.5% (0.07 wt %), respectively. The amount of CO<sub>2</sub> desorbed
increased with the increasing addition amount of MWCNTs, and stable
absorption loading is improved up to 18%. The MWCNTs were characterized
by XRD, NH<sub>3</sub>-TPD, FT-IR, N<sub>2</sub>-BET, and SEM before
and after several absorption–desorption cycles. The characterization
results verified their stability and activity for AEE aqueous solution.
Adding MWCNT-OH into the AEE solution exhibits application feasibility
in the industrial CO<sub>2</sub> capture process to increase the desorption
rate.