Abstract
Carbon dioxide (CO 2) sequestration using the accelerated carbonation of basic oxygen furnace (BOF) slag in a high-gravity rotating packed bed (RPB) under various operational conditions was investigated. The effects of reaction time, reaction temperature, rotation speed and slurry flow rate on the CO 2 sequestration process were evaluated. The samples of reacted slurry were analyzed quantitatively using thermogravimetric analysis (TGA) and atomic absorption spectrometry (AAS) and qualitatively using X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), and transmission electron microscopy (TEM). The sequestration experiments were performed at a liquid-to-solid ratio of 20:1 with a flow rate of 2.5Lmin -1 of a pure CO 2 stream under atmospheric temperature and pressure. The results show that a maximum conversion of BOF slag was 93.5% at a reaction time of 30min and a rotation speed of 750rpm at 65°C. The experimental data were utilized to determine the rate-limiting mechanism based on the shrinking core model (SCM), which was validated by the observations of SEM and TEM. Accelerated carbonation in a RPB was confirmed to be a viable method due to its higher mass-transfer rate.
| Original language | English |
|---|---|
| Pages (from-to) | 97-106 |
| Number of pages | 10 |
| Journal | Journal of Hazardous Materials |
| Volume | 227-228 |
| DOIs | |
| Publication status | Published - Aug 15 2012 |
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Keywords
- Alkaline solid wastes
- Basic oxygen furnace slag
- Calcium carbonate
- CO sequestration
- Shrinking core model
ASJC Scopus subject areas
- Health, Toxicology and Mutagenesis
- Pollution
- Waste Management and Disposal
- Environmental Chemistry
- Environmental Engineering
Cite this
Accelerated carbonation of steelmaking slags in a high-gravity rotating packed bed. / Chang, E. E.; Pan, Shu Yuan; Chen, Yi Hung; Tan, Chung Sung; Chiang, Pen Chi.
In: Journal of Hazardous Materials, Vol. 227-228, 15.08.2012, p. 97-106.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Accelerated carbonation of steelmaking slags in a high-gravity rotating packed bed
AU - Chang, E. E.
AU - Pan, Shu Yuan
AU - Chen, Yi Hung
AU - Tan, Chung Sung
AU - Chiang, Pen Chi
PY - 2012/8/15
Y1 - 2012/8/15
N2 - Carbon dioxide (CO 2) sequestration using the accelerated carbonation of basic oxygen furnace (BOF) slag in a high-gravity rotating packed bed (RPB) under various operational conditions was investigated. The effects of reaction time, reaction temperature, rotation speed and slurry flow rate on the CO 2 sequestration process were evaluated. The samples of reacted slurry were analyzed quantitatively using thermogravimetric analysis (TGA) and atomic absorption spectrometry (AAS) and qualitatively using X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), and transmission electron microscopy (TEM). The sequestration experiments were performed at a liquid-to-solid ratio of 20:1 with a flow rate of 2.5Lmin -1 of a pure CO 2 stream under atmospheric temperature and pressure. The results show that a maximum conversion of BOF slag was 93.5% at a reaction time of 30min and a rotation speed of 750rpm at 65°C. The experimental data were utilized to determine the rate-limiting mechanism based on the shrinking core model (SCM), which was validated by the observations of SEM and TEM. Accelerated carbonation in a RPB was confirmed to be a viable method due to its higher mass-transfer rate.
AB - Carbon dioxide (CO 2) sequestration using the accelerated carbonation of basic oxygen furnace (BOF) slag in a high-gravity rotating packed bed (RPB) under various operational conditions was investigated. The effects of reaction time, reaction temperature, rotation speed and slurry flow rate on the CO 2 sequestration process were evaluated. The samples of reacted slurry were analyzed quantitatively using thermogravimetric analysis (TGA) and atomic absorption spectrometry (AAS) and qualitatively using X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), and transmission electron microscopy (TEM). The sequestration experiments were performed at a liquid-to-solid ratio of 20:1 with a flow rate of 2.5Lmin -1 of a pure CO 2 stream under atmospheric temperature and pressure. The results show that a maximum conversion of BOF slag was 93.5% at a reaction time of 30min and a rotation speed of 750rpm at 65°C. The experimental data were utilized to determine the rate-limiting mechanism based on the shrinking core model (SCM), which was validated by the observations of SEM and TEM. Accelerated carbonation in a RPB was confirmed to be a viable method due to its higher mass-transfer rate.
KW - Alkaline solid wastes
KW - Basic oxygen furnace slag
KW - Calcium carbonate
KW - CO sequestration
KW - Shrinking core model
UR - http://www.scopus.com/inward/record.url?scp=84862644936&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84862644936&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2012.05.021
DO - 10.1016/j.jhazmat.2012.05.021
M3 - Article
C2 - 22633879
AN - SCOPUS:84862644936
VL - 227-228
SP - 97
EP - 106
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
ER -