Solvent-induced framework-interpenetration isomers of Cu MOFs for efficient light hydrocarbon separation

Wang, Yutong; Fan, Weidong; Wang, Xia; Han, Yinfeng; Zhang, Liangliang; Liu, Di; Dai, Fang; Sun, Daofeng

doi:10.1039/c8qi00469b

Cited by 28 publications

(13 citation statements)

References 36 publications

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“…As depicted in Figure 3c, at zero coverage, the Q st of C 3 H 6 of CAU-1 is 33.3 kJ/mol, higher than some other materials such as MFM-202a, 47 UTSA-35a, 45 LIFM-38, 48 and UPC-35. 49 It is noticed that the Q st of C 3 H 6 is constantly higher than that of N 2 , suggesting stronger interactions of CAU-1 with C 3 H 6 .…”

Section: Resultsmentioning

confidence: 91%

Ultramicroporous Metal–Organic Framework with Polar Groups for Efficiently Recovering Propylene from Polypropylene Off-Gas

Tan

Peng

Xue³

et al. 2019

Ind. Eng. Chem. Res.

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Recovery of propylene from polypropylene (PP) purge stream is of great importance due to both more efficient conversion of the monomers and environmental protection. Herein, eight stable metal–organic frameworks (MOFs) with various topological structures were synthesized and their C3H6/N2 separation performances were studied.The results indicate that CAU-1, an Al-MOF with ultramicroporous structure and amine-decorated function site, shows prominent C3H6/N2 liming selectivity among these MOFs. The ideal adsorbed solution theory (IAST) selectivity of CAU-1 is up to 236 under ambient condition, surpassing other reported porous materials. In addition, the high recovery efficiency (>99%) obtained by breakthrough experiments, good regenerability, and high stability under harsh chemical conditions suggest the great potential of CAU-1 in practical industrial application. Our work demonstrates that the ultramicroporous structures and polar groups in CAU-1 play key roles for C3H6/N2 separation, which provides a guideline to design and synthesize high-performance MOFs in propylene recovery from polypropylene off-gas.

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Section: Resultsmentioning

confidence: 91%

Ultramicroporous Metal–Organic Framework with Polar Groups for Efficiently Recovering Propylene from Polypropylene Off-Gas

Tan

Peng

Xue³

et al. 2019

Ind. Eng. Chem. Res.

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“…As for the mixture of C 3 and C 2 with equal proportion, the IAST selectivities are 15.3, 88, and 5.9, for C 3 H 8 /C 2 H 2 , C 3 H 8 /C 2 H 4 , and C 3 H 8 /C 2 H 6 , and 19.2, 121.8, and 5.9 for C 3 H 6 /C 2 H 2 , C 3 H 6 /C 2 H 4 , and C 3 H 6 /C 2 H 6 , respectively (Figure f), which are significantly higher than FJI-C1 (4.1, 9.0, and 6.8 for C 3 H 8 to C 2 H 2 , C 2 H 4 , and C 2 H 6 ), and UPC-35 (4.9. 6.9, and 5.5 for C 3 H 6 to C 2 H 2 , C 2 H 4 , and C 2 H 6 ; 4.9, 7.0, and 5.6 for C 3 H 8 to C 2 H 2 , C 2 H 4 , and C 2 H 6 ) . Interestingly, UPC-98 shows a relatively high adsorption selectivity toward C 2 H 2 /C 2 H 4 (3.1) compared to C 2 H 2 /C 2 H 6 (0.9) at room temperature.…”

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confidence: 94%

A Stable Interpenetrated Zn-MOF with Efficient Light Hydrocarbon Adsorption/Separation Performance

Wang

Zhang

Fan

et al. 2020

Crystal Growth & Design

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The design of MOFs with functionalized groups as well as suitable pore space plays a momentous part in gas adsorption and separation. Herein, a new Zn-MOF (Zn 4 (BTB-NH 2 ) 3 •xsolvent, UPC-98, H 3 BTB-NH 2 = 2′-amino-5′-(4carboxyphenyl)-[1,1′:3′,1″-terphenyl]-4,4″-dicarboxylic acid) was synthesized successfully by an amino-functionalized ligand (H 3 BTB-NH 2 ) for light hydrocarbon adsorption and separation application. UPC-98 with twofold interpenetrating structure retains relatively high thermal stability and acid−base stability, which can be stable in aqueous solutions (pH = 4−9) and air environment at 250 °C. Interestingly, UPC-98 with micropore of 4−5 Å displays a high uptake of C 3 H 8 (118.4 cm 3 •g −1 ) and C 3 H 6 (120.5 cm 3 •g −1 ) at 273 K and exhibits excellent adsorption selectivity of C 3 /C 1 and C 2 /C 1 . The effective separation performance for C 2 H 2 /C 2 H 4 is confirmed via breakthrough experiments.

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“…The major component of light hydrocarbon consists of methane (85%), ethane (9%), propane (3%), and butane (1%) [1][2][3][4][5] . Accordingly, propane produced from natural gas is important raw materials for modern industry [8][9][10] . For example, China's propane consumption in 2019 is 16.57 million tons 11 .…”

Section: Introductionmentioning

confidence: 99%

Th-MOF showing six-fold imide-sealed pockets for middle-size-separation of propane from nature gas

Feng¹,

Wang²,

Gong³

et al. 2021

Preprint

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Separation of propane from nature gas is of great importance to industry. However, in light of size-based separation, there still lacks effective method to directly separate propane from nature gas, due to the comparable physical properties for these light alkanes (C1-C4) and the middle size of propane. In this work, we found that a new Th-MOF could be an ideal solution for this issue. The Th-MOF takes UiO-66-type structure, but with the pocket sealed by six-fold imide groups; this not only precisely reduces the size of pocket to exactly match propane, but also enhances the host-guest interactions through multiple supramolecular interactions. As a result, highly selective adsorption of propane over methane, ethane, and butane was observed, implying unique middle-size separation. The actual separation was confirmed by breakthrough experiments, and it is found that both relatively smaller molecules (methane and ethane) and relatively bigger molecules (butane) break through the Th-MOF column within 10 min/g, whereas propane with middle size can maintain very long retention time up to 80 min/g, strongly suggesting middle-size separation and its superior application in direct separation of propane from nature gas. The separation mechanism, as unveiled by both theoretical calculation and comparative experiments, is due to the six-fold imide-sealed pockets that could effectively distinguish propane from other light alkanes through both size effect and host-guest interactions.

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Solvent-induced framework-interpenetration isomers of Cu MOFs for efficient light hydrocarbon separation

Abstract: For a pair of Cu-paddlewheel framework-interpenetrating isomers, the interpenetrating framework exhibits a high adsorption and separation selectivity for light hydrocarbons.

Cited by 28 publications

References 36 publications

Ultramicroporous Metal–Organic Framework with Polar Groups for Efficiently Recovering Propylene from Polypropylene Off-Gas

Ultramicroporous Metal–Organic Framework with Polar Groups for Efficiently Recovering Propylene from Polypropylene Off-Gas

A Stable Interpenetrated Zn-MOF with Efficient Light Hydrocarbon Adsorption/Separation Performance

Th-MOF showing six-fold imide-sealed pockets for middle-size-separation of propane from nature gas

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