Ultrathin porous amine-based solid adsorbent incorporated zeolitic imidazolate framework-8 membrane for gas separation

Qin, Yu; Xu, Li; Liu, Liying; Deng, Xiaoyu; Gao, Yucheng; Ding, Zijian

doi:10.1039/d1ra04801e

Cited by 10 publications

(2 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Currently, the main technologies have been explored for CO 2 /CH 4 separation, including cryogenic separation [ 13 , 14 ], membrane separation [ 15 , 16 , 17 ], water scrubbing [ 18 , 19 ], organic solvent scrubbing [ 20 , 21 ] and solid adsorbent adsorption separation [ 22 , 23 , 24 ]. The solid adsorbents, such as porous zeolites, carbon molecular sieves, titanium silicate, metal–organic frameworks, activated carbon and silica gel [ 25 , 26 , 27 ], presented many advantages of great separation efficiency and renewable capability and cost-effectiveness [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Amphipathic Solvent-Assisted Synthetic Strategy for Random Lamellae of the Clinoptilolites with Flower-like Morphology and Thinner Nanosheet for Adsorption and Separation of CO2 and CH4

Jia

Sun

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

The random lamellae of the synthetic CP were synthesized with a hydrothermal approach using o-Phenylenediamine (OPD) as a modifier. The decreases in the order degree of the CP synthesized in the presence of the OPD resulted from the loss of long-range order in a certain direction. Subsequently, the ultrasonic treatment and washing were conducive to further facilitate the disordered arrangements of its lamellae. The possible promotion mechanism regarding the nucleation and growth behaviors of the sol-gel particles was proposed. The fractal evolutions of the aluminosilicate species with crystallization time implied that the aluminosilicate species became gradually smooth to rough during the crystallization procedures since the amorphous structures transformed into flower-like morphologies. Their gas adsorption and separation performances indicated that the adsorption capacity of CO2 at 273 K reached up to 2.14 mmol·g−1 at 1 bar, and the selective factor (CO2/CH4) up to 3.4, much higher than that of the CPs synthesized without additive OPD. The breakthrough experiments displayed a longer breakthrough time and enhancement of CO2 uptake, showing better performance for CO2/CH4 separation. The cycling test further highlighted their efficiency for CO2/CH4 separation.

show abstract

Section: Introductionmentioning

confidence: 99%

Amphipathic Solvent-Assisted Synthetic Strategy for Random Lamellae of the Clinoptilolites with Flower-like Morphology and Thinner Nanosheet for Adsorption and Separation of CO2 and CH4

Jia

Sun

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…A major challenge for developing effective gas separation membranes is overcoming the well-known permeability-selectivity trade-off for light gases in polymeric materials, which leads to an upper bound that serves as reference for evaluating the advances in highly permselective membrane materials, and, in turn, influencing the material design [13][14][15][16]. The efforts for enhanced CO 2 /CH 4 separation have been focused on the development of large-scale projects by improving stability and efficiency, which are linked to the innovation of materials, thermally rearranged (TR) polymers, polymers of intrinsic microporosity (PIM), which are two types of polymers that consistently perform at or beyond the polymer upper bound for certain gas pairs (O 2 /N 2 and CO 2 /CH 4 ), biopolymer-based membranes and mixed matrix membranes (MMM) formulations and blending systems, where ionic liquids were included [14,15,[17][18][19][20][21][22][23][24]. The routes to develop better membranes were covered in these referenced reviews, which introduce some large-scale applications where better membranes based on new advanced materials could be implemented.…”

Section: Introductionmentioning

confidence: 99%

Multiobjective Optimization Based on “Distance-to-Target” Approach of Membrane Units for Separation of CO2/CH4

2021

View full text Add to dashboard Cite

The effective separation of CO2 and CH4 mixtures is essential for many applications, such as biogas upgrading, natural gas sweetening or enhanced oil recovery. Membrane separations can contribute greatly in these tasks, and innovative membrane materials are being developed for this gas separation. The aim of this work is the evaluation of the potential of two types of highly CO2-permeable membranes (modified commercial polydimethylsiloxane and non-commercial ionic liquid–chitosan composite membranes) whose selective layers possess different hydrophobic and hydrophilic characteristics for the separation of CO2/CH4 mixtures. The study of the technical performance of the selected membranes can provide a better understanding of their potentiality. The optimization of the performance of hollow fiber modules for both types of membranes was carried out by a “distance-to-target” approach that considered multiple objectives related to the purities and recovery of both gases. The results demonstrated that the ionic liquid–chitosan composite membranes improved the performance of other innovative membranes, with purity and recovery percentage values of 86 and 95%, respectively, for CO2 in the permeate stream, and 97 and 92% for CH4 in the retentate stream. The developed multiobjective optimization allowed for the determination of the optimal process design and performance parameters, such as the membrane area, pressure ratio and stage cut required to achieve maximum values for component separation in terms of purity and recovery. Since the purities and recoveries obtained were not enough to fulfill the requirements imposed on CO2 and CH4 streams to be directly valorized, the design of more complex multi-stage separation systems was also proposed by the application of this optimization methodology, which is considered as a useful tool to advance the implementation of the membrane separation processes.

show abstract

Non‐selective Defect Minimization towards Highly Efficient Metal‐Organic Framework Membranes for Gas Separation

Dorosti,

Ge,

Wang

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

The persistence of defects in polycrystalline membranes poses a substantial obstacle to reaching the theoretical molecular sieving separation and scaling up production. The low membrane selectivity in most reported literature is largely due to the unavoidable non‐selective defects during synthesis, leading to a mismatch between the well‐defined pore structure of polycrystalline molecular sieve materials. This paper presents a novel approach for minimizing non‐selective defects in metal‐organic framework (MOF) membranes by a constricted crystal growth strategy in a confined environment. The in‐situ ZIF formation using the densely packed seeding array between the substrate and the pre‐grown top ZIF layer yields a confined membrane interlayer, which is highly uniform with a tightly packed crystalline structure. Unlike uncontrolled crystal growth, we purposely regulate the interlayer membrane growth in the direction parallel to the substrate. A notable 99% decrease in defects in the confined interlayer was achieved compared to the random‐grown top layer, leading to a ~353% increment in H2/N2 selectivity over the non‐confined reference MOF membrane. The performance of this new membrane sits in the optimal range above the Robeson upper bound. The membrane boasts a balanced high H2 permeability (>5000 Barrer) and selectivity (>50), significantly surpassing peer ZIF membranes.

show abstract

Ultrathin porous amine-based solid adsorbent incorporated zeolitic imidazolate framework-8 membrane for gas separation

Abstract: The amine-based solid adsorbent was innovatively incorporated during the fabrication of the ZIF-8 membrane for gas separation.

Cited by 10 publications

References 72 publications

Amphipathic Solvent-Assisted Synthetic Strategy for Random Lamellae of the Clinoptilolites with Flower-like Morphology and Thinner Nanosheet for Adsorption and Separation of CO2 and CH4

Amphipathic Solvent-Assisted Synthetic Strategy for Random Lamellae of the Clinoptilolites with Flower-like Morphology and Thinner Nanosheet for Adsorption and Separation of CO2 and CH4

Multiobjective Optimization Based on “Distance-to-Target” Approach of Membrane Units for Separation of CO2/CH4

Non‐selective Defect Minimization towards Highly Efficient Metal‐Organic Framework Membranes for Gas Separation

Contact Info

Product

Resources

About