Abstract

Since limiting warming to 1.5 degrees C by 2100 will not only require an energy transition but also billions of tons of carbon dioxide (CO2) removal per year, it is essential to expand these efforts. This can be done offshore via electrochemical direct ocean capture (eChem DOC) which extracts CO2 from seawater that can later be stored underground or converted to products. Deployments of eChem DOC will be powered by renewable energy and therefore need to function with variable power inputs. This project aims to support future large-scale deployments by developing a model of eChem DOC operation, informed by industry and literature, and assessing its performance under variable power and varying designs. Initial analysis suggests that discretizing the eChem system has a higher impact on increasing overall capture than storing the chemical solutions to continue capture during periods of lower power availability, but this is likely situation dependent. Future work will use more realistic power profiles.
Original languageAmerican English
PublisherNational Renewable Energy Laboratory (NREL)
StatePublished - 2024

Publication series

NamePresented at the 2024 FECM / NETL Carbon Management Research Project Review Meeting, 5-9 August 2024, Pittsburgh, Pennsylvania

NREL Publication Number

  • NREL/PO-5700-90673

Keywords

  • direct ocean capture
  • electrochemical acid stripping CO2
  • electrochemical direct ocean capture
  • electrodialysis
  • Hybrid Optimization Performance Platform
  • hybrid renewable energy
  • marine carbon dioxide removal
  • marine energy
  • ocean carbon dioxide removal
  • offshore solar energy
  • offshore wind energy
  • python modeling
  • renewable energy

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