Porous metal-organic frameworks for gas storage and separation: Status and challenges

EnergyChem, Journal Year: 2019, Volume and Issue: 1(1), P. 100006 - 100006

Published: June 27, 2019

Language: Английский

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Microporous Metal-Organic Framework Materials for Gas Separation

Chem, Journal Year: 2019, Volume and Issue: 6(2), P. 337 - 363

Published: Nov. 11, 2019

Language: Английский

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Energy-efficient separation alternatives: metal–organic frameworks and membranes for hydrocarbon separation

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(15), P. 5359 - 5406

Published: Jan. 1, 2020

The diversity of metal–organic frameworks enables the design highly efficient adsorbents and membranes towards hydrocarbon separations for energy consumption mitigation.

Language: Английский

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Pore Space Partition within a Metal–Organic Framework for Highly Efficient C₂H₂/CO₂ Separation

Journal of the American Chemical Society, Journal Year: 2019, Volume and Issue: 141(9), P. 4130 - 4136

Published: Feb. 22, 2019

The pore space partition (PSP) approach has been employed to realize a novel porous MOF (FJU-90) with dual functionalities for the challenging C2H2/CO2 separation under ambient conditions. By virtue of triangular ligand (Tripp = 2,4,6-tris(4-pyridyl)pyridine), cylindrical channels in original FJU-88 have partitioned into uniformly interconnected cavities, leading dramatically reduced apertures from 12.0 × 9.4 5.4 5.1 Å2. Narrowing down sizes, resulting activated FJU-90a takes up very large amount C2H2 (180 cm3 g–1) but much less CO2 (103 at 298 K and 1 bar, demonstrating it be best material this (50%:50%) terms gravimetric productivity. IAST calculations, molecular modeling studies, simulated experimental breakthrough experiments comprehensively demonstrate that strategy is powerful constructing MOFs functionality gas separation.

Language: Английский

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A Robust Ethane-Trapping Metal–Organic Framework with a High Capacity for Ethylene Purification

Journal of the American Chemical Society, Journal Year: 2019, Volume and Issue: 141(12), P. 5014 - 5020

Published: March 12, 2019

The separation of ethane from ethylene is prime importance in the purification chemical feedstocks for industrial manufacturing. However, differentiating these compounds notoriously difficult due to their similar physicochemical properties. High-performance porous adsorbents provide a solution. Conventional trap preference ethane, but this incurs multiple steps processes. Alternatively, high-purity can be obtained single step if adsorbent preferentially adsorbs over ethylene. We herein report metal–organic framework, MUF-15 (MUF, Massey University Framework), constructed inexpensive precursors that sequesters ethane/ethylene mixtures. productivity material exceptional: 1 kg MOF produces 14 L polymer-grade gas adsorption starting an equimolar mixture. Computational simulations illustrate underlying mechanism guest adsorption. performance was assessed by measuring multicomponent breakthrough curves, which maintained wide range feed compositions and operating pressures. robust, maintains its presence acetylene, easily regenerated purging with inert or placing under reduced pressure.

Language: Английский

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Simultaneous Trapping of C₂H₂ and C₂H₆ from a Ternary Mixture of C₂H₂/C₂H₄/C₂H₆ in a Robust Metal–Organic Framework for the Purification of C₂H₄

Angewandte Chemie International Edition, Journal Year: 2018, Volume and Issue: 57(49), P. 16067 - 16071

Published: Oct. 19, 2018

Abstract The removal of C 2 H and 6 from 4 streams is great significance for feedstock purification to produce polyethylene other commodity chemicals but the simultaneous adsorption over a ternary mixture has never been realized. Herein, robust metal–organic framework, TJT‐100, was designed synthesized, which demonstrates remarkably selective . Breakthrough experiments show that TJT‐100 can be used as an adsorbent high‐performance /C (0.5:99:0.5) afford purity greater than 99.997 %, beyond required ethylene polymerization. Computational studies reveal uncoordinated carboxylate oxygen atoms coordinated water molecules pointing towards pore trap through formation multiple C−H⋅⋅⋅O electrostatic interactions, while corresponding –framework interaction unfavorable.

Language: Английский

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Alternatives to Cryogenic Distillation: Advanced Porous Materials in Adsorptive Light Olefin/Paraffin Separations

Small, Journal Year: 2019, Volume and Issue: 15(25)

Published: April 17, 2019

As primary feedstocks in the petrochemical industry, light olefins such as ethylene and propylene are mainly obtained from steam cracking of naphtha short chain alkanes (ethane propane). Due to their similar physical properties, separations paraffins-pivotal processes meet olefin purity requirement downstream processing-are typically performed by highly energy-intensive cryogenic distillation at low temperatures high pressures. To reduce energy input save costs, adsorptive olefin/paraffin have been proposed promising techniques complement or even replace distillation, growing efforts devoted developing advanced adsorbents fulfill this challenging task. In Review, a holistic view is first provided summarizing how different established leverage differences between paraffins for effective separations. Subsequently, recent advances development porous materials highlighted with an emphasis on separation mechanisms. Last, perspective possible directions push limit research field presented.

Language: Английский

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Cage-Interconnected Metal–Organic Framework with Tailored Apertures for Efficient C₂H₆/C₂H₄ Separation under Humid Conditions

Journal of the American Chemical Society, Journal Year: 2019, Volume and Issue: 141(51), P. 20390 - 20396

Published: Nov. 29, 2019

Metal-organic frameworks (MOFs) with open metal sites (OMSs) have been shown to preferentially adsorb unsaturated hydrocarbons such as C2H4 due the formation of π-complexation. However, adsorption capacity and selectivity might well be dampened under humid conditions because OMSs could easily poisoned in presence water vapor. C2H6-selective adsorbents less hydrophilic environments, on other hand, not only effectively minimize impact humidity separation but also directly produce high-purity from C2H6/C2H4 mixtures. Here, we report a MOF (JNU-2) underlying rare xae topology. Its cage-like cavities are interconnected through apertures limiting diameter ca. 3.7 Å, which is domain kinetic diameters C2H6 molecules. Molecular modeling studies suggest four oxygen atoms aperture poised interact multiple C-H···O hydrogen bonding, rendering JNU-2 an enhanced selectivity. Indeed, experimental results reveal that takes up great amount comparable top-performing MOFs displays excellent even conditions; moreover, it can regenerated at room temperature owing its moderate enthalpy. This work successfully demonstrated strategy balancing for by designing materials tailored apertures. The function screening selectivity, while internal provide space large adsorption.

Language: Английский

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Pore-Space-Partition-Enabled Exceptional Ethane Uptake and Ethane-Selective Ethane–Ethylene Separation

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(5), P. 2222 - 2227

Published: Jan. 27, 2020

An ideal material for C2H6/C2H4 separation would simultaneously have the highest C2H6 uptake capacity and selectivity. But such is elusive. A benchmark ethane-selective peroxo-functionalized MOF-74-Fe that exhibits best known performance due to its high selectivity (4.4), although moderate (74.3 cm3/g). Here, we report a family of pore-space-partitioned crystalline porous materials (CPMs) with exceptional potential (i.e., C2H4 recovered from mixture) despite their (up 1.75). The ethane as 166.8 cm3/g at 1 atm 298 K, more than twice peroxo-MOF-74-Fe, has been achieved even though isosteric heat adsorption (21.9–30.4 kJ/mol) these CPMs low about one-third peroxo-MOF-74-Fe (66.8 kJ/mol). While overall potentials not yet surpassed robust exhibit outstanding properties including thermal stability 450 °C) aqueous stability, regeneration energy, degree chemical geometrical tunability within same isoreticular framework.

Language: Английский

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

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: June 22, 2020

Abstract Separation of C 2 H 4 from /C 6 mixture with high working capacity is still a challenging task. Herein, we deliberately design Th-metal-organic framework (MOF) for highly efficient separation binary and ternary mixture. The synthesized MOF Azole-Th-1 shows UiO-66-type structure fcu topology built on Th secondary building unit tetrazole-based linker. Such noticeable structure, connected by N,O-donor ligand chemical stability. At 100 kPa 298 K performs excellent (purity > 99.9%) not only (1:9, v/v) but also (9:1:90, v/v/v), the corresponding can reach up to 1.13 1.34 mmol g −1 , respectively. mechanism, as unveiled density functional theory calculation, due stronger van der Waals interaction between ethane skeleton.

Language: Английский

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