Microporous Metal–Organic Framework with Dual Functionalities for Efficient Separation of Acetylene from Light Hydrocarbon Mixtures

Abstract

Separating acetylene from light hydrocarbon mixtures like ethylene is a very important process for downstream industrial applications. Herein, we report a new MOF [CuL 2 (SiF 6 )] (UTSA-220, L = (1E,2E)-1,2-bis(pyridin-4ylmethylene)hydrazine) with dual functionalities featuring optimal pore size with strong binding sites for acetylene. UTSA-220 exhibits apparently higher uptake capacity for C 2 H 2 than those for other light hydrocarbons. The potential of this material for trace C 2 H 2 removal from C 2 H 4 has also been demonstrated by a dynamic breakthrough experiment performed with C 2 H 2 / C 2 H 4 (1/99 v/v) under simulated industrial conditions. According to the dispersion-corrected density functional theory (DFT-D) simulation, SiF 6 2− and azine moieties serve as preferential binding sites for C 2 H 2 , indicating the feasibility of the dual functionalities incorporated in UTSA-220 for adsorbent-based C 2 H 2 separations.

RETRACTED ARTICLE: A porous Co(II)–MOF for selective C2H2/CO2 separation and treatment activity on virus-induced COPD via reducing tlr3 gene expression

“…Thus, we want to study MOF which has abundant bases and micropores. Moreover, in recent years, it has been shown that the establishment for the porous MOFs with bifunctional ligands is a feasible way to obtain the donor positions discordant MOFs [20][21][22]. In this research, a novel MOF containing Co(II) ions as nodes f[Co(L)]Á4H 2 OÁ2CH 3 CNg n (1) have been prepared via Co(NO 3 ) 2 Á6H 2 O reacting with the bifunctional ligand 5-(3,5-di-pyridin-4-yl- [1,2,4]triazol-1-ylmethyl)-isophthalic acid (H 2 L) under the solvothermal conditions (Scheme 1).…”

A Microporous MOF with Inorganic Nitrate Ions Immobilized on a Porous Surface Displaying Efficient C2H2 Separation and Purification

“…Accordingly, the single-component adsorption-desorption isotherms for C 2 H 2 , CO 2 , and CH 4 were collected at three different temperatures of 278 K, 288 K, and 298 K and pressures up to 1 atm (Figure 3). The adsorption branches were overlapped with the desorption ones for all isotherms, indicating the ad- , [12] MOF-5 (26 cm 3 (STP) g -1 ), [12] BSF-1 (52.6 cm 3 (STP) g -1 ), [13] [Zn 12 (tdc) 6 (glycerol) 6 (dabco) 3 ] (55.1 cm 3 (STP) g -1 ), [14] UTSA-36 (56.8 cm 3 (STP) g -1 ), [15] Cu 2 (bdc) 2 (dabco) (60 cm 3 (STP) g -1 ), [16] Mg(HCOO) 2 (66 cm 3 (STP) g -1 ), [17] (Me 2 NH 2 ) 2 [Zn 6 (TBAPy) 2 (Ade-NH 2 ) 4 (μ 4 -O)] (69.4 cm 3 (STP) g -1 ), [18] CPL-2 (70 cm 3 (STP) g -1 ), [19] SIFSIX-3-Ni (74 cm 3 (STP) g -1 ), [6] UTSA-220 (76 cm 3 (STP) g -1 ), [20] Ni-gallate (80.4 cm 3 (STP) g -1 ), [21] and TIFSIX-2-Cu-i (91.8 cm 3 (STP g -1 ). [6] To our delight, ZJNU-8 adsorbed much more amount of C 2 H 2 than CO 2 and CH 4 especially at the low pressure.…”

A robust Th-azole framework for highly efficient purification of C2H4 from a C2H4/C2H2/C2H6 mixture

“…And partial hydrogenation of acetylene into ethylene over catalyst 10 or solvent extraction of cracked olefins 11 are also involved with the purification of ethylene from acetylene. Adsorptive separation by porous materials is an alternative technology, especially, some metal-organic frameworks (MOFs) [12][13][14][15][16][17][18][19][20][21] with high volume, designable pore characteristics, and countless structural possibilities, can be employed into the gas separation processes, the adsorption selectivity and capacity are higher than the results of conventional adsorbents [22][23][24] such as zeolites and carbon-based, especially the adsorption and separation for C 2 H 6 /C 2 H 4 8,22,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] .…”