McNeil, LA;
Mutch, GA;
Iacoviello, F;
Bailey, JJ;
Triantafyllou, G;
Neagu, D;
Miller, TS;
... Metcalfe, IS; + view all
(2020)
Dendritic silver self-assembly in molten-carbonate membranes for efficient carbon dioxide capture.
Energy & Environmental Science
, 13
(6)
pp. 1766-1775.
10.1039/c9ee03497h.
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Abstract
Membranes for CO_{2} capture should offer high permeant fluxes to keep membrane surface area small and material requirements low. Ag-supported, dual-phase, molten-carbonate membranes routinely demonstrate the highest CO_{2} fluxes in this class of membrane. However, using Ag as a support incurs high cost. Here, the non-equilibrium conditions of permeation were exploited to stimulate the self-assembly of a percolating, dendritic network of Ag from the molten carbonate. Multiple membrane support geometries and Ag incorporation methods were employed, demonstrating the generality of the approach, while X-ray micro-computed tomography confirmed that CO_{2} and O_{2} permeation stimulated self-assembly. We report the highest flux of Ag-supported molten-salt membranes to date (1.25 ml min^{−1} cm^{−2} at 650 °C) and ultrahigh permeability (9.4 × 10^{−11} mol m^{−1} s−1 Pa^{−1}), surpassing the permeability requirement for economically-competitive post-combustion CO_{2} capture, all whilst reducing the membrane-volume-normalised demand for Ag by one order of magnitude.
| Type: | Article |
|---|---|
| Title: | Dendritic silver self-assembly in molten-carbonate membranes for efficient carbon dioxide capture |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c9ee03497h |
| Publisher version: | https://doi.org/10.1039/C9EE03497H |
| Language: | English |
| Additional information: | © The Royal Society of Chemistry 2020. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10096587 |
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