Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 130-140 |
| Number of pages | 11 |
| Journal | Chemical Engineering Research and Design |
| Volume | 146 |
| DOIs | |
| Publication status | Published - 1 Jun 2019 |
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Keywords
- Alkali metal oxalates
- CO adsorption
- K C O activation
- Pineapple waste
- Porous carbon
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
Cite this
Preparation of pineapple waste-derived porous carbons with enhanced CO 2 capture performance by hydrothermal carbonation-alkali metal oxalates assisted thermal activation process. / Zhu, Mengyuan; Cai, Weiquan; Verpoort, Francis; Zhou, Jiabin.
In: Chemical Engineering Research and Design, Vol. 146, 01.06.2019, p. 130-140.Research output: Contribution to journal › Article
}
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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UR - http://www.scopus.com/inward/citedby.url?scp=85064447822&partnerID=8YFLogxK
U2 - 10.1016/j.cherd.2019.03.044
DO - 10.1016/j.cherd.2019.03.044
M3 - Article
VL - 146
SP - 130
EP - 140
JO - Chemical Engineering Research and Design
JF - Chemical Engineering Research and Design
SN - 0263-8762
ER -