What question did this study set out to answer?

This research aims to enhance the purification of perfluoropropane by selectively removing perfluoropropylene using a novel Al-based MOF.

June 6, 2026

Shape‐Recognition in an Al‐MOF Enables High C 3 F 6 Adsorption and Size‐Sieving Separation of C 3 F 6 /C 3 F 8

Key Points

This research aims to enhance the purification of perfluoropropane by selectively removing perfluoropropylene using a novel Al-based MOF.
Utilized a rigid Al-based MOF called HIAM-344 with nitrate-regulated narrow pores.
Conducted dynamic breakthrough experiments to evaluate the separation performance.
Performed computational studies to analyze adsorbate-adsorbent interactions.
Achieved a record-high C3F6 uptake of 78.8 cm3/g at 298 K and 1 bar.
Maintained a capacity of 59.2 cm3/g at a low pressure of 0.01 bar.
Demonstrated complete separation of C3F6 and C3F8, producing electronic-grade C3F8 (>99.999%).

Abstract

ABSTRACT The purification of perfluoropropane (C 3 F 8 ) relies on the selective removal of trace perfluoropropylene (C 3 F 6 ), which remains challenging due to their similar physicochemical properties. Herein, we report a rigid Al‐based MOF, HIAM‐344, featuring nitrate‐regulated narrow pore windows and large cavities that enable simultaneous molecular sieving of C 3 F 6 /C 3 F 8 and high C 3 F 6 adsorption at low pressure. HIAM‐344 exhibits a record‐high C 3 F 6 uptake of 78.8 cm 3 g −1 at 298 K and 1 bar, and maintains a remarkably high capacity of 59.2 cm 3 g −1 at a low pressure of 0.01 bar. Dynamic breakthrough experiments demonstrate complete splitting of C 3 F 6 and C 3 F 8 , and direct production of electronic‐grade C 3 F 8 (>99.999%). Computational studies reveal that the outstanding separation performance originates from the synergistic size and shape recognition, as well as the favorable adsorbate‐adsorbent interactions.

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