Abstract: C3H6 adsorption on a family of NIIC-20-G (G = glycol) MOFs is carried out. The C3H6 adsorption capacities at 1 bar vary from 109.3 to 168 mlg–1 (273 K) and from 74.2 to 113.3 mlg–1 (298 K), depending on the nature of G. The following highest IAST adsorption selectivity values (S) are obtained at 298 K, 1:1 gas mixture, 1 bar: S(C3H6/CO2) = 7.4, S(C3H6/CH4) = 587.0, S(C3H6/C2H6) = 4.4, S(C3H6/C2H4) = 7.0, S(C3H8/C3H6) = 2.1. The isosteric heats of the C3H6 adsorption range from 32.4 to 38.0 kJ∙mol–1, which are lower than that of C3H8, suggesting enthalpy-driven preferential adsorption of propane over propylene. Theoretical DFT and GCMC calculations support the experimental results and provide more detailed information on the nature of adsorption centers of propane and propylene molecules. Multiple breakthrough separation experiments are carried out for NIIC-20-Pr (Pr = propyleneglycol) using different C3H6/C2H4 and C3H8/C3H6 gas mixtures. The productivity of ethylene ranges from 2.60 to 2.94 mol∙kg–1, the propylene productivity is 0.56 mol·kg–1. Given the remarkable fundamental adsorption characteristics, the NIIC-20-G porous materials should be considered among the best solutions for efficient and economically viable separation of industrially important gas mixtures.

Cite: Lysova A. , Kovalenko K. , Nizovtsev A. , Dybtsev D. , Fedin V.
Tunable selective adsorption and efficient purification of propylene on a series of mesoporous metal-organic frameworks
Microporous and Mesoporous Materials. 2026. V.402. 113993 :1-8. DOI: 10.1016/j.micromeso.2025.113993 WOS Scopus

Dates:

Submitted:	Nov 7, 2025
Accepted:	Dec 10, 2025
Published print:	Jan 15, 2026

Identifiers:

Web of science:	WOS:001642287900002
Scopus:	2-s2.0-105024539193

Citing: Пока нет цитирований

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