CO2 regeneration performance enhancement by nanoabsorbents for energy conversion application

Jung Hun Lee, Jae Won Lee, Yong Tae Kang

Research output: Contribution to journalArticle

3 Citations (Scopus)

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 languageEnglish
Pages (from-to)980-988
Number of pages9
JournalApplied Thermal Engineering
Volume103
DOIs
Publication statusPublished - 2016 Jun 25

Fingerprint

Energy conversion
Methanol
Global warming
Refrigeration
Fossil fuels
Gasification
Greenhouse gases
Cements
Visualization
Nanoparticles
Gases
Experiments
Temperature

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 journalArticle

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