Three-dimensional simulation of bubble behavior and mass transfer for CO2 absorption in nanoabsorbents

Lirong Li, Yong Tae Kang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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..

Original languageEnglish
Title of host publicationASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791858905
DOIs
Publication statusPublished - 2019 Jan 1
EventASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019 - Dalian, China
Duration: 2019 Jul 82019 Jul 10

Publication series

NameASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019

Conference

ConferenceASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019
CountryChina
CityDalian
Period19/7/819/7/10

Keywords

  • AlO nanoparticles
  • Bubble behavior
  • CO absorption
  • DPM model
  • Mass transfer enhancement
  • VOF model

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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  • Cite this

    Li, L., & Kang, Y. T. (2019). Three-dimensional simulation of bubble behavior and mass transfer for CO2 absorption in nanoabsorbents. In ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019 (ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2019). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/MNHMT2019-3944