TY - JOUR
T1 - Preparation of pineapple waste-derived porous carbons with enhanced CO
2
capture performance by hydrothermal carbonation-alkali metal oxalates assisted thermal activation process
AU - Zhu, Mengyuan
AU - Cai, Weiquan
AU - Verpoort, Francis
AU - Zhou, Jiabin
PY - 2019/6/1
Y1 - 2019/6/1
N2 -
The pineapple waste-derived porous carbons with enhanced CO
2
adsorption performance were successfully prepared by a facile hydrothermal carbonation and followed thermal activation using facile alkali metal oxalates instead of KOH or K
2
CO
3
for chemical activation. Compared with macroporous-mesoporous carbons activated by Li
2
C
2
O
4
and Na
2
C
2
O
4
, the microporous carbon activated by K
2
C
2
O
4
at 700 °C with a relatively high specific surface area of 1076.3 m
2
g
−1
and big pore volume of 0.92 cm
3
g
-1
for narrow micropores (<1 nm)for narrow micropores (<1 nm) shows the highest adsorption capacities of 5.32 mmol g
-1
at 0 °C, and 4.25 mmol g
-1
at 25 °C under 1 bar, respectively. Furthermore, all the samples show high selectivities from 18.24 to 38.42 for CO
2
/N
2
separation, stable cyclic capability with adsorption loss of 12.6–17.8% after twelve cycles at 25 °C and reasonable isosteric heat of CO
2
adsorption. Especially, the microporous carbon activated by facile K
2
C
2
O
4
at 700 °C shows speedy adsorption dynamics and excellent dynamic adsorption performance for simulated flue gas based on its breakthrough curve. In combination with the low-cost carbon source, the above advantages make the pineapple waste-derived porous carbons exceptionally potential sorbent to capture and separate CO
2
under real conditions.
AB -
The pineapple waste-derived porous carbons with enhanced CO
2
adsorption performance were successfully prepared by a facile hydrothermal carbonation and followed thermal activation using facile alkali metal oxalates instead of KOH or K
2
CO
3
for chemical activation. Compared with macroporous-mesoporous carbons activated by Li
2
C
2
O
4
and Na
2
C
2
O
4
, the microporous carbon activated by K
2
C
2
O
4
at 700 °C with a relatively high specific surface area of 1076.3 m
2
g
−1
and big pore volume of 0.92 cm
3
g
-1
for narrow micropores (<1 nm)for narrow micropores (<1 nm) shows the highest adsorption capacities of 5.32 mmol g
-1
at 0 °C, and 4.25 mmol g
-1
at 25 °C under 1 bar, respectively. Furthermore, all the samples show high selectivities from 18.24 to 38.42 for CO
2
/N
2
separation, stable cyclic capability with adsorption loss of 12.6–17.8% after twelve cycles at 25 °C and reasonable isosteric heat of CO
2
adsorption. Especially, the microporous carbon activated by facile K
2
C
2
O
4
at 700 °C shows speedy adsorption dynamics and excellent dynamic adsorption performance for simulated flue gas based on its breakthrough curve. In combination with the low-cost carbon source, the above advantages make the pineapple waste-derived porous carbons exceptionally potential sorbent to capture and separate CO
2
under real conditions.
KW - Alkali metal oxalates
KW - CO adsorption
KW - K C O activation
KW - Pineapple waste
KW - Porous carbon
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U2 - 10.1016/j.cherd.2019.03.044
DO - 10.1016/j.cherd.2019.03.044
M3 - Article
AN - SCOPUS:85064447822
VL - 146
SP - 130
EP - 140
JO - Chemical Engineering Research and Design
JF - Chemical Engineering Research and Design
SN - 0263-8762
ER -