Enhanced CO2/CH4 separation performance of mixed-matrix membranes through dispersion of sorption-selective MOF nanocrystals

Chen, Ke; Xu, Kai; Liu, Xiang; Dong, Xiao; Han, Yue; Wang, Chongqing; Sun, Lin‐Bing; Pan, Yichang

doi:10.1016/j.memsci.2018.06.007

Cited by 94 publications

(48 citation statements)

References 49 publications

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“…Such significant improvements in the mixed-matrix membrane's CO2/CH4 separation performance and mechanical strength suggest a feasible and effective approach for potential biogas upgrading and natural gas purification . For Chen et al (2018) and Kanehashi et al (2018), MMMs can increase the permeability and/or selectivity of polymeric membranes and can reduce membrane aging, also the membranes containing carbon or porous organic nanoparticles were the most stable.…”

Section: Purification Of Biogas By Membranesmentioning

confidence: 99%

“…Inorganic membranes are an area of interest for many researchers because of their higher values of permeability and selectivity. The ability of these membranes to withstand harsh environmental conditions, make them eligible for CO2/CH4 separation (SAHOTA et al, 2018;CHEN et al, 2018). Due to high thermal and chemical stability, inorganic membranes provide higher separation performance with longer operational life at complicated fabrication process and higher cost.…”

Section: Comparative Analysis Of Purification Of Biogas By Membrane Smentioning

confidence: 99%

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Use of membranas for biogas purification: review

Gomes

Morais

Pasquini

2019

RHE

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O biogás é um combustível orgânico limpo que é produzido pela decomposição da matéria orgânica sob condições anaeróbias, composto de cerca de 55-65% de metano, 30-45% de dióxido de carbono, traços de sulfeto de hidrogênio e frações de vapor de água. A presença de outros compostos além do metano, embora ocorram em concentrações muito baixas, é um problema, uma vez que são prejudiciais para qualquer equipamento de processamento e restringem seu uso. Portanto, para atingir a composição padrão de biogás, é importante incluir as etapas de purificação antes de usar o biogás. As tecnologias tradicionais de purificação baseiam-se essencialmente no uso de métodos físicos e químicos, que também geram poluentes secundários e são caros. O presente estudo é uma revisão de diferentes processos de purificação de biogás baseados em membranas que são amplamente utilizados em todo o mundo e as principais tecnologias sendo desenvolvidas ou em pesquisa. Materiais de membrana apropriados, bem como um módulo eficiente e projeto de processo, determinam a competitividade com a tecnologia de separação convencional.

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Section: Purification Of Biogas By Membranesmentioning

confidence: 99%

Section: Comparative Analysis Of Purification Of Biogas By Membrane Smentioning

confidence: 99%

Use of membranas for biogas purification: review

Gomes

Morais

Pasquini

2019

RHE

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“…KAUST-7 showed an apparent pore size of 4.75 Å and a CO 2 sorption capacity of 2.2 mmol/g at 25 °C and 1 bar. Recently, Chen et al [ 125 ] synthesized nanosized KAUST-7 crystals by novel co-solvent synthesis method ( Figure 7 ) and dispersed them in 6FDA-Durene matrix. The CO 2 permeability increased along with the loading from 750 (pristine polymer) to 1038 (33 wt.% loading) Barrer ( Table 5 ).…”

Section: Metal Organic Framework (Mofs)mentioning

confidence: 99%

“… Fine-tuning crystal size of KAUST-7 by varying ethanol-water (solvent) ratios in synthesis solution: ( a ) pure water, ethanol/water ratio of ( b ) 0.46, ( c ) 0.82, ( d ) 1.2, ( e ) 1.5, ( f ) 2.2, ( g ) 2.7, ( h ) 6.3, and ( i ) pure ethanol [ 125 ], with copyright permission from © 2018 Elsevier. …”

Section: Figurementioning

confidence: 99%

Performance of Mixed Matrix Membranes Containing Porous Two-Dimensional (2D) and Three-Dimensional (3D) Fillers for CO2 Separation: A Review

et al. 2018

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Application of conventional polymeric membranes in CO2 separation processes are limited by the existing trade-off between permeability and selectivity represented by the renowned upper bound. Addition of porous nanofillers in polymeric membranes is a promising approach to transcend the upper bound, owing to their superior separation capabilities. Porous nanofillers entice increased attention over nonporous counterparts due to their inherent CO2 uptake capacities and secondary transport pathways when added to polymer matrices. Infinite possibilities of tuning the porous architecture of these nanofillers also facilitate simultaneous enhancement of permeability, selectivity and stability features of the membrane conveniently heading in the direction towards industrial realization. This review focuses on presenting a complete synopsis of inherent capacities of several porous nanofillers, like metal organic frameworks (MOFs), Zeolites, and porous organic frameworks (POFs) and the effects on their addition to polymeric membranes. Gas permeation performances of select hybrids with these three-dimensional (3D) fillers and porous nanosheets have been summarized and discussed with respect to each type. Consequently, the benefits and shortcomings of each class of materials have been outlined and future research directions concerning the hybrids with 3D fillers have been suggested.

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“…The selectivity of various gases are not included in the context of this paper. Additionally, Chen 40 reported that are highly selective towards CO 2 due to the suitable CO 2 molecular fit in their ultramicropores (less than 0.7 nm), polarization in addition to electrostatic forces from their inorganic anions such as SiF 6 −2 . The two are known to have a one-dimensional pore channels and adopt cubic topology.…”

mentioning

confidence: 99%

Solid Sorbents as a Retrofit Technology for CO2 Removal from Natural Gas Under High Pressure and Temperature Conditions

Khraisheh

Almomani

Walker

2020

Sci Rep

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The capture of CO2 under high pressure and temperature is challenging and is required in a number for industrial applications including natural gas processing. In this work, we examine the use of benchmark hybrid ultraporous materials HUMs for their potential use in CO2 adsorption processes under high-pressure conditions, with three varying temperatures (283, 298 and 318 K). NbOFFOVE-1-Ni and SIFSIX-3-Ni were the selected HUMs given their established superior CO2 capacity under low pressure (0–1 bar). Both are microporous with highly ordered crystalline structures as compared to the mesoporous hexagonal silica (Santa Barbara Anhydrous-15 (SBA-15)). SBA-15 was previously tested for both low and high-pressure applications and can serve as a benchmark in this study. Sorbent characterization using XRD, SEM, FTIR and N2 adsorption were conducted to assure the purity and structure of the sorbents. TGA analysis were conducted to establish the thermal stability of the sorbents under various temperatures. High-pressure CO2 adsorption was conducted from 0–35 bar using magnetic suspension balance (Rubotherm). Although the SBA-15 had the highest surface (527 m3/g) are of the three adsorbents, the CO2 adsorption capacity (0.42 mmol/g) was an order of magnitude less than the studies HUMs with SIFSIX-3-Ni having 2.6 mmol/g, NbOFFIVE-1-Ni achieving 2.5 mmol/g at 298 K. Multistage adsorption isotherms were obtained at different pressures. In addition, results indicate that electrostatics in HUMs are most effective at improving isosteric heat of adsorption Qst and CO2 uptake. Higher temperatures had negative effect on adsorption capacity for the HUMs and SBA-15 at pressures between 7–9 bar. In SAB-15 the effect of temperature is reversed in what is known as a cross over phenomena.

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Enhanced CO2/CH4 separation performance of mixed-matrix membranes through dispersion of sorption-selective MOF nanocrystals

Cited by 94 publications

References 49 publications

Use of membranas for biogas purification: review

Use of membranas for biogas purification: review

Performance of Mixed Matrix Membranes Containing Porous Two-Dimensional (2D) and Three-Dimensional (3D) Fillers for CO2 Separation: A Review

Solid Sorbents as a Retrofit Technology for CO2 Removal from Natural Gas Under High Pressure and Temperature Conditions

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