TY - GEN
T1 - Three-dimensional simulation of bubble behavior and mass transfer for CO2 absorption in nanoabsorbents
AU - Li, Lirong
AU - Kang, Yong Tae
PY - 2019/1/1
Y1 - 2019/1/1
N2 - CO2 absorption performance in gas-liquid system is affected by nanoparticles. The enhancement mechanisms involved have been extensively paid attention. The CO2 gas bubble behaviors and the characteristics of the nanoparticle motion have been clarified in the present study. The equivalent substitution method is used to regard the liquid with nanoparticles as a continuous term with changed physical properties, that is, nanofluid. Therefore, the volume-of-fluid (VOF) method is employed to well predict the gas bubble behaviors and mass transfer coefficient in nanofluid. It is found that the mass transfer coefficient in the gas-liquid system for CO2 absorption can be significantly enhanced by Al2O3 nanoparticles. With the increase of nanoparticles volume concentration, the surface renewal frequency increases dramatically. The discrete-particle-method (DPM) is adopted to track the motion of nanoparticles. In this way, the deformation of the bubbles and the motion of the nanoparticle are well captured. It is concluded that the enhanced mass transfer coefficient in gas-liquid-nanoparticle system is not only related to the Brownian motion of the particles, but also related to the nanoparticle deduced turbulence in the liquid field..
AB - CO2 absorption performance in gas-liquid system is affected by nanoparticles. The enhancement mechanisms involved have been extensively paid attention. The CO2 gas bubble behaviors and the characteristics of the nanoparticle motion have been clarified in the present study. The equivalent substitution method is used to regard the liquid with nanoparticles as a continuous term with changed physical properties, that is, nanofluid. Therefore, the volume-of-fluid (VOF) method is employed to well predict the gas bubble behaviors and mass transfer coefficient in nanofluid. It is found that the mass transfer coefficient in the gas-liquid system for CO2 absorption can be significantly enhanced by Al2O3 nanoparticles. With the increase of nanoparticles volume concentration, the surface renewal frequency increases dramatically. The discrete-particle-method (DPM) is adopted to track the motion of nanoparticles. In this way, the deformation of the bubbles and the motion of the nanoparticle are well captured. It is concluded that the enhanced mass transfer coefficient in gas-liquid-nanoparticle system is not only related to the Brownian motion of the particles, but also related to the nanoparticle deduced turbulence in the liquid field..
KW - AlO nanoparticles
KW - Bubble behavior
KW - CO absorption
KW - DPM model
KW - Mass transfer enhancement
KW - VOF model
UR - http://www.scopus.com/inward/record.url?scp=85084099657&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85084099657&partnerID=8YFLogxK
U2 - 10.1115/MNHMT2019-3944
DO - 10.1115/MNHMT2019-3944
M3 - Conference contribution
AN - SCOPUS:85084099657
T3 - ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019
BT - ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019
Y2 - 8 July 2019 through 10 July 2019
ER -