A microporous calcium-based MOF for separation of CH4 from C2 hydrocarbons and CO2. (1st November 2021)

• Record Type: Journal Article
• Authors: Chen, Min; Wang, Zhuo-Wei
• Is Part Of: Polyhedron. Volume 208(2021)
• Publication Date: 2021-11-01
• Subjects: Metal-organic frameworks -- C2 hydrocarbons -- Carbon dioxide -- Methane -- Selectivity; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2021.115438
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: A new hms -type metal-organic framework, namely {[Ca3 (NTB)2 (H2 O)2 ]·NMF·4NMP·4H2 O}n (Ca-MOF), with microporous channels constructed by Ca(II) ions and triphenylamine-based carboxylate ligand was successfully synthesized under solvothermal condition. Ca-MOF exhibits selectivity for C2 hydrocarbons and CO2 over CH4 . Abstract: A hms -type microporous metal-organic framework, {[Ca3 (NTB)2 (H2 O)2 ]·NMF·4NMP·4H2 O}n (Ca-MOF, H3 NTB = 4, 4′, 4″-nitrilotrisbenzoic acid, NMF = N -methyl formamide, NMP = N -methyl-2-pyrrolidone), was solvothermal synthesized. Desolvated Ca-MOF shows relatively high C2 hydrocarbons and CO2 storage capacity at 298 K and 1 atm (C2 H2 : 107.0 cm 3 g −1, C2 H4 : 79.0 cm 3 g −1, C2 H6 : 99.2 cm 3 g −1, CO2 : 65.9 cm 3 g −1 ), and a lower CH4 adsorption uptake (14.6 cm 3 g −1 ). Its ideal adsorbed solution theory (IAST)-predicted selectivities of C2 hydrocarbons and CO2 over CH4 range from 5.7 to 10.0 at room temperature, indicating its potential for separation of C2 hydrocarbons and CO2 from CH4 .