TY - JOUR
T1 - Experimental investigation of CO2 adsorption and desorption on multi-type amines loaded HZSM-5 zeolites
AU - Cheng, Huaigang
AU - Song, Huiping
AU - Toan, Sam
AU - Wang, Baofeng
AU - Gasem, Khaled A.M.
AU - Fan, Maohong
AU - Cheng, Fangqin
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/2/15
Y1 - 2021/2/15
N2 - Solid adsorbents were prepared by fixing amines to HZSM-5 zeolites via wet impregnation method, and the CO2 adsorption properties were investigated in a fixed-bed adsorption system followed by the structural, thermodynamic and kinetic studies. The HZSM-5 with 25 in Si/Al ratio and ~2.3 μm in average particle size was found to be a favourable CO2 adsorbent support; whereby CO2 adsorbents supporting monoethanolamine (MEA) and hydroxyethyl ethylenediamine (AEEA) exhibited good CO2 adsorption capacities, with maximum values of 4.27 and 4.44 mmol/g being achieved, respectively. Desorption kinetics and thermodynamic studies showed that the CO2 desorption process of AEEA loaded HZSM-5 exhibited a low activation energy of 54.27 kJ/mol. This low activation energy attributes to two possible reasons: HZSM-5 zeolite provides a large number of free H+ ions, which directly participate in carbamate breakdown; HZSM-5 can also provide metal atoms (Al) that attach to the N atom of carbamate, thereby stretching the C-N bond and promoting decomposition. Furthermore, the AEEA loaded HASM-5 adsorbent has high adsorption-desorption stability in the regeneration cycle tests, revealing the energy efficiency of the CO2 desorption process and low CO2 capture cost.
AB - Solid adsorbents were prepared by fixing amines to HZSM-5 zeolites via wet impregnation method, and the CO2 adsorption properties were investigated in a fixed-bed adsorption system followed by the structural, thermodynamic and kinetic studies. The HZSM-5 with 25 in Si/Al ratio and ~2.3 μm in average particle size was found to be a favourable CO2 adsorbent support; whereby CO2 adsorbents supporting monoethanolamine (MEA) and hydroxyethyl ethylenediamine (AEEA) exhibited good CO2 adsorption capacities, with maximum values of 4.27 and 4.44 mmol/g being achieved, respectively. Desorption kinetics and thermodynamic studies showed that the CO2 desorption process of AEEA loaded HZSM-5 exhibited a low activation energy of 54.27 kJ/mol. This low activation energy attributes to two possible reasons: HZSM-5 zeolite provides a large number of free H+ ions, which directly participate in carbamate breakdown; HZSM-5 can also provide metal atoms (Al) that attach to the N atom of carbamate, thereby stretching the C-N bond and promoting decomposition. Furthermore, the AEEA loaded HASM-5 adsorbent has high adsorption-desorption stability in the regeneration cycle tests, revealing the energy efficiency of the CO2 desorption process and low CO2 capture cost.
KW - Carbon dioxide
KW - HZSM-5
KW - Hydroxyethyl ethylenediamine (AEEA)
KW - Monoethanolamine (MEA)
KW - Sorbent
KW - Zeolite
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U2 - 10.1016/j.cej.2020.126882
DO - 10.1016/j.cej.2020.126882
M3 - Article
AN - SCOPUS:85090414760
SN - 1385-8947
VL - 406
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 126882
ER -