Abstract
Cost-effective porous carbons for CO 2 capture were developed from petroleum coke using KOH as an activating agent. In particular, the effect of the carbonization temperature on the physical properties and CO 2 adsorption behavior of the prepared porous carbons was investigated while keeping the other conditions constant during KOH activation. The highest specific surface area and total pore volume of 1470 m 2 /g and 0.60 cm 3 /g were obtained for the porous carbon carbonized at 500 °C, with higher carbonization temperatures resulting in reduced porosities. XRD and FTIR analyses revealed that the structural disorder and amount of surface functional groups, both of which are favorable for porosity development during activation, had opposite trends with increasing carbonization temperature. Therefore, an optimal carbonization temperature existed for the maximum porosity. The porous carbon carbonized at 500 °C exhibited the highest CO 2 adsorption capacity of 4.17 mmol/g at 25 °C and 1 bar owing to its highest narrow micropore volume (pore size of less than 0.8 nm). In addition to its high CO 2 adsorption capacity, the prepared porous carbon presented good selectivity for CO 2 over N 2 , moderate heat of adsorption, fast adsorption kinetics, facile regeneration, and stable adsorption working capacity during consecutive adsorption and desorption cycles, indicating its promise in practical CO 2 capture applications.
| Original language | English |
|---|---|
| Pages (from-to) | 85-92 |
| Number of pages | 8 |
| Journal | Fuel |
| Volume | 248 |
| DOIs | |
| Publication status | Published - 2019 Jul 15 |
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Keywords
- Carbonization temperature
- CO adsorption
- KOH activation
- Narrow micropore
- Petroleum coke
- Porous carbon
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
- Organic Chemistry
Cite this
Effect of carbonization temperature on the physical properties and CO 2 adsorption behavior of petroleum coke-derived porous carbon . / Jang, Eunji; Choi, Seung Wan; Lee, Ki Bong.
In: Fuel, Vol. 248, 15.07.2019, p. 85-92.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of carbonization temperature on the physical properties and CO 2 adsorption behavior of petroleum coke-derived porous carbon
AU - Jang, Eunji
AU - Choi, Seung Wan
AU - Lee, Ki Bong
PY - 2019/7/15
Y1 - 2019/7/15
N2 - Cost-effective porous carbons for CO 2 capture were developed from petroleum coke using KOH as an activating agent. In particular, the effect of the carbonization temperature on the physical properties and CO 2 adsorption behavior of the prepared porous carbons was investigated while keeping the other conditions constant during KOH activation. The highest specific surface area and total pore volume of 1470 m 2 /g and 0.60 cm 3 /g were obtained for the porous carbon carbonized at 500 °C, with higher carbonization temperatures resulting in reduced porosities. XRD and FTIR analyses revealed that the structural disorder and amount of surface functional groups, both of which are favorable for porosity development during activation, had opposite trends with increasing carbonization temperature. Therefore, an optimal carbonization temperature existed for the maximum porosity. The porous carbon carbonized at 500 °C exhibited the highest CO 2 adsorption capacity of 4.17 mmol/g at 25 °C and 1 bar owing to its highest narrow micropore volume (pore size of less than 0.8 nm). In addition to its high CO 2 adsorption capacity, the prepared porous carbon presented good selectivity for CO 2 over N 2 , moderate heat of adsorption, fast adsorption kinetics, facile regeneration, and stable adsorption working capacity during consecutive adsorption and desorption cycles, indicating its promise in practical CO 2 capture applications.
AB - Cost-effective porous carbons for CO 2 capture were developed from petroleum coke using KOH as an activating agent. In particular, the effect of the carbonization temperature on the physical properties and CO 2 adsorption behavior of the prepared porous carbons was investigated while keeping the other conditions constant during KOH activation. The highest specific surface area and total pore volume of 1470 m 2 /g and 0.60 cm 3 /g were obtained for the porous carbon carbonized at 500 °C, with higher carbonization temperatures resulting in reduced porosities. XRD and FTIR analyses revealed that the structural disorder and amount of surface functional groups, both of which are favorable for porosity development during activation, had opposite trends with increasing carbonization temperature. Therefore, an optimal carbonization temperature existed for the maximum porosity. The porous carbon carbonized at 500 °C exhibited the highest CO 2 adsorption capacity of 4.17 mmol/g at 25 °C and 1 bar owing to its highest narrow micropore volume (pore size of less than 0.8 nm). In addition to its high CO 2 adsorption capacity, the prepared porous carbon presented good selectivity for CO 2 over N 2 , moderate heat of adsorption, fast adsorption kinetics, facile regeneration, and stable adsorption working capacity during consecutive adsorption and desorption cycles, indicating its promise in practical CO 2 capture applications.
KW - Carbonization temperature
KW - CO adsorption
KW - KOH activation
KW - Narrow micropore
KW - Petroleum coke
KW - Porous carbon
UR - http://www.scopus.com/inward/record.url?scp=85062898162&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85062898162&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2019.03.051
DO - 10.1016/j.fuel.2019.03.051
M3 - Article
AN - SCOPUS:85062898162
VL - 248
SP - 85
EP - 92
JO - Fuel
JF - Fuel
SN - 0016-2361
ER -