Robust Anion-PillaredUltramicroporous Material forC<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> Separation withHigh C<sub>2</sub>H<sub>2</sub> Uptake and Selectivity
Removing trace amounts of C<sub>2</sub>H<sub>2</sub> from C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> mixtures for C<sub>2</sub>H<sub>4</sub> purification is crucial but extremely challenging. In this work, by introducing SiF<sub>6</sub><sup>2–</sup> with specific recognition for C<sub>2</sub>H<sub>2</sub>, we constructed a robust adsorbent, FJI-W88, with a high C<sub>2</sub>H<sub>2</sub> adsorption capacity and excellent C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> separation selectivity. FJI-W88 not only exhibits ultrahigh C<sub>2</sub>H<sub>2</sub> uptake at 0.01 bar (2.80 mmol g<sup>–1</sup>) but also shows exceptional C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> (1/99) IAST selectivity of 698. Column breakthrough experiments further demonstrate that FJI-W88 can obtain C<sub>2</sub>H<sub>4</sub> of high purity (≥99.95%) and high yield (230.0 mol kg<sup>–1</sup>) from C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> (1/99) mixtures. Additionally, the C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> (1/99) separation performance of FJI-W88 is basically unaffected under harsh conditions, such as high temperature and humidity.
Publication Details
- Journal
- Figshare
- Published
- 2025-03-22
- DOI
- https://doi.org/10.1021/acs.inorgchem.5c00749.s001
- Primary Topic
- Mycorrhizal Fungi and Plant Interactions
- Type
- article
- Field-Weighted Citation Impact
- 0.00