A Lagrangian Two-Phase Model for Assessing the Near-Field Impacts of CO2 Ocean Sequestration

Baixin Chen, Masahiro Nishio, Yongchen Song, Makato Akai

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

Abstract

A new version of a two-phase numerical model is developed to simulate CO2 droplet dissolution and the plume dynamics of CO2 enriched seawater produced by direct release of liquid CO2 into deep ocean from a towed pipe. This Lagrangian framework model consists of three sub-models. They are the CO2 droplet moving and dissolving sub-model, the turbulent dispersion of CO2 enriched seawater sub-model, and the biological impact sub-model. We performed simulations of direct injection of liquid CO2 from a release platform towed by a moving-ship into mid-depth seawater to examine the roles of injection parameters, including release platform type and initial CO2 droplet size. Results from the simulations show that a horizontal release platform can create a plume with less physical and biological impacts than a plume created by a vertical release platform. With an injection rate of 100kg/s, simulations predict that injection of small droplets (5mm in diameter) would produce up to 1.5 times the pH. reduction of larger droplets (15 mm in diameter). This large pH. reduction may significantly affect ambient Zooplankton.

Original languageEnglish
Title of host publication25th International Conference on Offshore Mechanics and Arctic Engineering
PublisherAmerican Society of Mechanical Engineers
Pages425-431
Number of pages7
ISBN (Electronic)0791837777
ISBN (Print)0791847497
DOIs
Publication statusPublished - 2006
Event25th International Conference on Offshore Mechanics and Arctic Engineering 2006 - Hamburg, Germany
Duration: 4 Jun 20069 Jun 2006

Conference

Conference25th International Conference on Offshore Mechanics and Arctic Engineering 2006
Abbreviated titleOMAE 2006
CountryGermany
CityHamburg
Period4/06/069/06/06

Keywords

  • Biological impacts
  • CO droplet
  • Ocean storage
  • pH change
  • Two-phase flow

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fluid Flow and Transfer Processes
  • Ocean Engineering

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  • Cite this

    Chen, B., Nishio, M., Song, Y., & Akai, M. (2006). A Lagrangian Two-Phase Model for Assessing the Near-Field Impacts of CO2 Ocean Sequestration. In 25th International Conference on Offshore Mechanics and Arctic Engineering (pp. 425-431). American Society of Mechanical Engineers. https://doi.org/10.1115/OMAE2006-92225