Science· 2016Q1
Pore chemistry and size control in hybrid porous materials for acetylene capture from ethylene
- 1,431citations
- Q1SCImago
- 2016year
Short summary
New metal coordination networks with tailored pore chemistry and size enable preferential binding and orderly assembly of acetylene molecules, achieving high adsorption capacity (2.1 mmol/g at 0.025 bar) and selectivity (39.7-44.8) for acetylene at ambient conditions.
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Key points
- Developed metal coordination networks with controlled pore chemistry and size for gas separation.
- Acetylene binding sites validated by modeling and neutron powder diffraction.
- Achieved high acetylene adsorption capacity of 2.1 mmol/g at 0.025 bar.
- Demonstrated high acetylene selectivity of 39.7-44.8.
- Showcased efficiency in separating acetylene/ethylene mixtures via breakthrough curves.
AI-generated from the title and abstract; the full text is not read.
Abstract
The trade-off between physical adsorption capacity and selectivity of porous materials is a major barrier for efficient gas separation and purification through physisorption. We report control over pore chemistry and size in metal coordination networks with hexafluorosilicate and organic linkers for the purpose of preferential binding and orderly assembly of acetylene molecules through cooperative host-guest and/or guest-guest interactions. The specific binding sites for acetylene are validated by modeling and neutron powder diffraction studies. The energies associated with these binding interactions afford high adsorption capacity (2.1 millimoles per gram at 0.025 bar) and selectivity (39.7 to 44.8) for acetylene at ambient conditions. Their efficiency for the separation of acetylene/ethylene mixtures is demonstrated by experimental breakthrough curves (0.73 millimoles per gram from a 1/99 mixture).
The authors' abstract, as published at the source. Science, 2016 · DOI ↗
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Field: Inorganic Chemistry
Inorganic ChemistryChemistry