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.