Abstract
Due to the recent increase in the consumption of energy and the use of fossil fuels, global warming has become a serious issue. To address this problem, CO2 gas, which is the major element of the greenhouse gases, should be captured, regenerated and converted to useful fuels. The Integrated Gasification Combined Cycle (IGCC) and cement process generate large amount of CO2, which are controlled through pre-combustion capture. However, this method has a disadvantage because the system temperature should be decreased to -20 °C or lower. Therefore, the development of new absorbent is required to reduce the energy consumed for refrigeration. There is a study that improved the CO2 absorption performance by adding Al2O3 nanoparticles to methanol. However, studies on the regeneration of CO2 in nanofluid absorbents (nanoabsorbents) are insufficient. Therefore, in this study, the CO2 regeneration performance in Al2O3 nanoabsorbents is evaluated. It is found that the regeneration performance of CO2 is improved by 16% by using nanoabsorbents compared to methanol. Furthermore, the CO2 regeneration characteristics of nanoabsorbents are analyzed by considering the detachment time of CO2 bubbles from the surface, the cross-sectional area of CO2 bubble, and the number of regeneration sites through the CO2 regeneration and bubble visualization experiments. It is concluded that the mechanism of surface effect is the most plausible to explain the CO2 regeneration performance enhancement by nanoabsorbents.
| Original language | English |
|---|---|
| Pages (from-to) | 980-988 |
| Number of pages | 9 |
| Journal | Applied Thermal Engineering |
| Volume | 103 |
| DOIs | |
| Publication status | Published - 2016 Jun 25 |
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Keywords
- AlO nanoparticles
- CO regeneration
- Enhancement mechanism
- Nanoabsorbents
- Visualization
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Industrial and Manufacturing Engineering
Cite this
CO2 regeneration performance enhancement by nanoabsorbents for energy conversion application. / Lee, Jung Hun; Lee, Jae Won; Kang, Yong Tae.
In: Applied Thermal Engineering, Vol. 103, 25.06.2016, p. 980-988.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - CO2 regeneration performance enhancement by nanoabsorbents for energy conversion application
AU - Lee, Jung Hun
AU - Lee, Jae Won
AU - Kang, Yong Tae
PY - 2016/6/25
Y1 - 2016/6/25
N2 - Due to the recent increase in the consumption of energy and the use of fossil fuels, global warming has become a serious issue. To address this problem, CO2 gas, which is the major element of the greenhouse gases, should be captured, regenerated and converted to useful fuels. The Integrated Gasification Combined Cycle (IGCC) and cement process generate large amount of CO2, which are controlled through pre-combustion capture. However, this method has a disadvantage because the system temperature should be decreased to -20 °C or lower. Therefore, the development of new absorbent is required to reduce the energy consumed for refrigeration. There is a study that improved the CO2 absorption performance by adding Al2O3 nanoparticles to methanol. However, studies on the regeneration of CO2 in nanofluid absorbents (nanoabsorbents) are insufficient. Therefore, in this study, the CO2 regeneration performance in Al2O3 nanoabsorbents is evaluated. It is found that the regeneration performance of CO2 is improved by 16% by using nanoabsorbents compared to methanol. Furthermore, the CO2 regeneration characteristics of nanoabsorbents are analyzed by considering the detachment time of CO2 bubbles from the surface, the cross-sectional area of CO2 bubble, and the number of regeneration sites through the CO2 regeneration and bubble visualization experiments. It is concluded that the mechanism of surface effect is the most plausible to explain the CO2 regeneration performance enhancement by nanoabsorbents.
AB - Due to the recent increase in the consumption of energy and the use of fossil fuels, global warming has become a serious issue. To address this problem, CO2 gas, which is the major element of the greenhouse gases, should be captured, regenerated and converted to useful fuels. The Integrated Gasification Combined Cycle (IGCC) and cement process generate large amount of CO2, which are controlled through pre-combustion capture. However, this method has a disadvantage because the system temperature should be decreased to -20 °C or lower. Therefore, the development of new absorbent is required to reduce the energy consumed for refrigeration. There is a study that improved the CO2 absorption performance by adding Al2O3 nanoparticles to methanol. However, studies on the regeneration of CO2 in nanofluid absorbents (nanoabsorbents) are insufficient. Therefore, in this study, the CO2 regeneration performance in Al2O3 nanoabsorbents is evaluated. It is found that the regeneration performance of CO2 is improved by 16% by using nanoabsorbents compared to methanol. Furthermore, the CO2 regeneration characteristics of nanoabsorbents are analyzed by considering the detachment time of CO2 bubbles from the surface, the cross-sectional area of CO2 bubble, and the number of regeneration sites through the CO2 regeneration and bubble visualization experiments. It is concluded that the mechanism of surface effect is the most plausible to explain the CO2 regeneration performance enhancement by nanoabsorbents.
KW - AlO nanoparticles
KW - CO regeneration
KW - Enhancement mechanism
KW - Nanoabsorbents
KW - Visualization
UR - http://www.scopus.com/inward/record.url?scp=84965048009&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84965048009&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2016.04.160
DO - 10.1016/j.applthermaleng.2016.04.160
M3 - Article
AN - SCOPUS:84965048009
VL - 103
SP - 980
EP - 988
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
SN - 1359-4311
ER -