In the present study, surface modification of Fe3O4 particles with ascorbic acid (AA-Fe3O4) is carried out to enhance the absorption and regeneration performances of Fe3O4 nanoabsorbents with magnetic fields. The surface modified AA-Fe3O4 particles compensate for the defects of commercial magnetic nanoparticles by enhanced hydrophilicity and increased surface area. Methanol, which is widely used as a conventional industrial physical absorbent of CO2 capture, is used as a base fluid; however, the absorption process must be operated at low temperature for high absorption performance. In addition, a substantial amount of energy input is required to reach the regeneration operating temperature. Manufactured AA-Fe3O4 is analyzed using various analysis methods to assess absorption characteristics. Furthermore, a property analysis of 0.005 vol% AA-Fe3O4 dispersed in methanol shows that a high dispersion stability is obtained compared to 0.005 vol% commercial Fe3O4 dispersed in methanol. An evaluation on the performance of AA-Fe3O4 at 25 °C in the presence of external rotating magnetic fields shows an enhancement of 23.3 % in absorption. According to the specific energy consumption analysis, it is concluded that AA-Fe3O4/methanol nanoabsorbents will be beneficial for industrial applications in efficient energy savings for CO2 capture.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) . (No. NRF-2020R1A5A1018153 ).
- CO absorption/regeneration
- Magnetic fields
- Specific energy consumption analysis
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Waste Management and Disposal
- Process Chemistry and Technology