Modeling, Optimization, and Techno-Economic Analysis of Bipolar Membrane Electrodialysis for Direct Air Capture Processes

Francesco Sabatino*, Matteo Gazzani, Fausto Gallucci, Martin van Sint Annaland

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Bipolar membrane electrodialysis (BPMED) could allow for the complete electrification of direct air capture (DAC) technologies. In this work, we have modeled and optimized two DAC processes based on different electrodialysis cell designs. The technical assessment has been complemented by a detailed economic analysis, showing the advantages but also the current shortcomings of this technology and pathways for advancement. A minimum energy demand of 24 MJ kgCO2–1 has been estimated for the base-case scenario, a result comparable to what has been reported for other liquid-scrubbing DAC technologies. Several solutions to further abate power consumption have been reviewed, with the most promising case providing a 29% reduction. Membrane cost and performance are currently the main limiting factors. In a scenario where cheaper membranes with better performance are assumed to be available, total costs below $250 tonCO2–1 may be feasible, making BPMED a viable fully electrified alternative to other technologies requiring natural gas.
Original languageEnglish
Pages (from-to)12668–12679
Number of pages12
JournalIndustrial & Engineering Chemistry Research
Volume61
Issue number34
Early online date9 Aug 2022
DOIs
Publication statusPublished - 31 Aug 2022

Keywords

  • atmospheric chemistry
  • electrical conductivity
  • Electrical energy
  • energy
  • membranes

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