Adsorptive Separation of Acetylene from Ethylene in Isostructural Gallate‐Based Metal–Organic Frameworks

Abstract

The separation of acetylene from ethylene is of paramount importancei nt he purification of chemicalf eedstocks fori ndustrial manufacturing. Herein, an isostructural series of gallate-based metal-organic frameworks (MOFs), Mgallate (M = Ni, Mg, Co), featuring three-dimensionallyi nterconnected zigzag channels, the aperture size of which can be finely tunedw ithin 0.3 by metalr eplacement. Controlling the apertures ize of M-gallate materials slightly from 3.69 down to 3.47 could result in ad ramatic enhancement of C 2 H 2 /C 2 H 4 separation performance.A st he smallest radius amongt he studied metal ions, Ni-gallate exhibits the best C 2 H 2 /C 2 H 4 adsorption separation performance owingt ot he strongestc onfinement effect,r ankinga fter the state-of-theart UTSA-200a with aC 2 H 4 productivity of 85.6 mol L À1 from 1:99 C 2 H 2 /C 2 H 4 mixture. The isostructural gallate-based MOFs, readilys ynthesized from inexpensive gallic acid, are demonstratedt ob ean ew

Adsorptive Separation of Geometric Isomers of 2-Butene on Gallate-Based Metal–Organic Frameworks

“…23 Notably, Mgallate were also found to display excellent performance in the adsorption separation of C 2 H 2 from C 2 H 4 as a result of supramolecular interactions and steric effect. 24 On the whole, these results indicate the potential of this series of gallate-based MOFs to affect the separation mixtures of hydrocarbons with comparable sizes through shape-selective separation, which generally depends on the subtle matching of the shape and size of the adsorbates with the micropores of adsorbent. Herein, we explore the ability of M-gallate (M = Ni, Mg, Co) to separate C 4 mixtures and find that they display excellent performance for the adsorption separation of trans/cis-2-butene and 1,3butadiene, 1-butene, and iso-butene with record-high selectivity.…”

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.…”

One-step synthesis of nitrogen-grafted copper-gallic acid for enhanced methylene blue removal

“…A study by Rahim et al (2020) reported the preparation of an adsorbent from the combination of TA/Zn(IV) MPN for capturing heavy metal contaminants in wastewater 14 . Wang et al (2019) assembled Ni-, Mg-, and Co-gallate with a tunable aperture for the adsorption and separation of acetylene from ethylene 15 . Within the range of available phenolic linkers, TA, gallic acid (GA), and polydopamine (PDA) are the widely used linker for MPN synthesis 16 – 19 .…”