Two-dimensional cobalt metal-organic frameworks for efficient C3H6/CH4 and C3H8/CH4 hydrocarbon separation

A Co-based two-dimensional (2D) microporous metal-organic frameworks, [Co-2(TMTA)(DMF)(2)(H2O)(2)]center dot NO3-center dot DMF (UPC-32) has been synthesized based on 4,4',4-(2,4,6-trimethylbenzene-1,3,5-triyl) tribenzoic acid (H(3)TMTA). UPC-32 features a 2D microporous framework exhibits high adsorption of H2 (118.2 cm(3)/g, 1.05 wt%, at 77 K), and adsorption heat (Q(st)) of CO2 (34-46 kJ/mol). UPC-32 with narrow distance between layers (3.8 angstrom) exhibits high selectivity of C3H6/CH4 (31.46) and C3H8/CH4 (28.04) at 298 K and 1 bar. It is the first 2D Co-MOF that showed selective separation of C3 hydrocarbon from CH4. (C) 2017 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.