# A new strategy for membrane-based direct air capture

Article · Shigenori Fujikawa, Roman Selyanchyn, Toyoki Kunitake

- Archive id: doi:10.1038/s41428-020-00429-z
- Published: 2020-10-15
- Venue: Polymer Journal
- DOI: https://doi.org/10.1038/s41428-020-00429-z
- Citations: 179
- Source URL: https://doi.org/10.1038/s41428-020-00429-z
- PDF: https://www.nature.com/articles/s41428-020-00429-z.pdf
- Provenance: openalex

## Abstract

Abstract Direct CO2 capture from the air, so-called direct air capture (DAC), has become inevitable to reduce the concentration of CO2 in the atmosphere. Current DAC technologies consider only sorbent-based systems. Recently, there have been reports that show ultrahigh CO2 permeances in gas separation membranes and thus membrane separation could be a potential new technology for DAC in addition to sorbent-based CO2 capture. The simulation of chemical processes has been well established and is commonly used for the development and performance assessment of industrial chemical processes. These simulations offer a credible assessment of the feasibility of membrane-based DAC (m-DAC). In this paper, we discuss the potential of m-DAC considering the state-of-the-art performance of organic polymer membranes. The multistage membrane separation process was employed in process simulation to estimate the energy requirements for m-DAC. Based on the analysis, we propose the target membrane separation performance required for m-DAC with competitive energy expenses. Finally, we discuss the direction of future membrane development for DAC.

_Abstract reproduced under CC-BY (publisher license, via OpenAlex)._

Topics: [Carbon Dioxide Removal](https://space-kitty.com/topics/carbon-removal)

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