Abstract
Highly porous carbon microsheets (CMS) were prepared by the bulk carbonization and activation of waste packing peanuts, and applied to CO2 capture and release. Two different activation methods, physical activation using CO2 and chemical activation using KOH, were used for the preparation of porous CMS, and the effects of different activation methods were compared. Chemical activation functioned better than the physical activation, successfully producing highly microporous carbon structures with higher carbon yield. Textural properties such as specific surface area and total pore volume increased proportionally to the mass ratio of KOH/carbon because of the development of the porous structure and enlargement of pore size through KOH activation. Among the samples prepared, the highest CO2 adsorption capacities of 6.51 mol kg−1 at 0 °C and 4.07 mol kg−1 at 25 °C were obtained at 1 bar in the packing-peanut-derived CMS prepared with a KOH/carbon ratio of 3 (CMS-K3). It is noteworthy that the CO2 adsorption uptake was significantly dependent on the volume of narrow micropores of pore sizes less than 0.8 nm rather than the specific surface area or total pore volume. CMS-K3 also exhibited excellent cyclic stability, good CO2/N2 selectivity, fast adsorption kinetics, and low heat of adsorption, being regarded as a promising adsorbent for CO2 capture.
| Original language | English |
|---|---|
| Article number | 122219 |
| Journal | Chemical Engineering Journal |
| DOIs | |
| Publication status | Published - 2020 Jan 1 |
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Keywords
- Activation
- Carbonization
- CO adsorption
- Packing peanut
- Porous carbon microsheets
ASJC Scopus subject areas
- Chemistry(all)
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering
Cite this
Solving two environmental problems simultaneously : Scalable production of carbon microsheets from structured packing peanuts with tailored microporosity for efficient CO2 capture. / Hong, Seok Min; Yoon, Hyung Jin; Choi, Yeji; Cho, Yung Zun; Mun, Sungyong; Pol, Vilas G.; Lee, Ki Bong.
In: Chemical Engineering Journal, 01.01.2020.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Solving two environmental problems simultaneously
T2 - Scalable production of carbon microsheets from structured packing peanuts with tailored microporosity for efficient CO2 capture
AU - Hong, Seok Min
AU - Yoon, Hyung Jin
AU - Choi, Yeji
AU - Cho, Yung Zun
AU - Mun, Sungyong
AU - Pol, Vilas G.
AU - Lee, Ki Bong
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Highly porous carbon microsheets (CMS) were prepared by the bulk carbonization and activation of waste packing peanuts, and applied to CO2 capture and release. Two different activation methods, physical activation using CO2 and chemical activation using KOH, were used for the preparation of porous CMS, and the effects of different activation methods were compared. Chemical activation functioned better than the physical activation, successfully producing highly microporous carbon structures with higher carbon yield. Textural properties such as specific surface area and total pore volume increased proportionally to the mass ratio of KOH/carbon because of the development of the porous structure and enlargement of pore size through KOH activation. Among the samples prepared, the highest CO2 adsorption capacities of 6.51 mol kg−1 at 0 °C and 4.07 mol kg−1 at 25 °C were obtained at 1 bar in the packing-peanut-derived CMS prepared with a KOH/carbon ratio of 3 (CMS-K3). It is noteworthy that the CO2 adsorption uptake was significantly dependent on the volume of narrow micropores of pore sizes less than 0.8 nm rather than the specific surface area or total pore volume. CMS-K3 also exhibited excellent cyclic stability, good CO2/N2 selectivity, fast adsorption kinetics, and low heat of adsorption, being regarded as a promising adsorbent for CO2 capture.
AB - Highly porous carbon microsheets (CMS) were prepared by the bulk carbonization and activation of waste packing peanuts, and applied to CO2 capture and release. Two different activation methods, physical activation using CO2 and chemical activation using KOH, were used for the preparation of porous CMS, and the effects of different activation methods were compared. Chemical activation functioned better than the physical activation, successfully producing highly microporous carbon structures with higher carbon yield. Textural properties such as specific surface area and total pore volume increased proportionally to the mass ratio of KOH/carbon because of the development of the porous structure and enlargement of pore size through KOH activation. Among the samples prepared, the highest CO2 adsorption capacities of 6.51 mol kg−1 at 0 °C and 4.07 mol kg−1 at 25 °C were obtained at 1 bar in the packing-peanut-derived CMS prepared with a KOH/carbon ratio of 3 (CMS-K3). It is noteworthy that the CO2 adsorption uptake was significantly dependent on the volume of narrow micropores of pore sizes less than 0.8 nm rather than the specific surface area or total pore volume. CMS-K3 also exhibited excellent cyclic stability, good CO2/N2 selectivity, fast adsorption kinetics, and low heat of adsorption, being regarded as a promising adsorbent for CO2 capture.
KW - Activation
KW - Carbonization
KW - CO adsorption
KW - Packing peanut
KW - Porous carbon microsheets
UR - http://www.scopus.com/inward/record.url?scp=85069660877&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85069660877&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2019.122219
DO - 10.1016/j.cej.2019.122219
M3 - Article
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
M1 - 122219
ER -