High CO2 Adsorption Capacity and CO2/CH4 Selectivity by Nanocomposites of MOF-199

Salehi, Samira; Anbia, Mansoor

doi:10.1021/acs.energyfuels.6b03347

Cited by 117 publications

(50 citation statements)

References 47 publications

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“…This behavior is related to sample S specific surface area being twice as large as sample A (Table 2). Unlike CO 2 sorption, selectivity (CO 2 /N 2 ) of sample A is higher when compared to sample S. This behavior is attributed to metal presence in sample A improving support/CO 2 affinity 1,58,59,62,63 . Comparing CO 2 sorption capacity of IL immobilized samples one can observe a reduction in CO 2 sorption values for all samples.…”

Section: Influence Of Anion On Co 2 Sorption Capacitymentioning

confidence: 92%

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Imidazolium-based Ionic Liquids Impregnated in Silica and Alumina Supports for CO2 Capture

et al. 2019

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Ionic liquids (ILs) physical immobilization in solid materials is a key strategy for developing efficient and low cost CO 2 capture processes. In this work, two porous commercial substrates with different characteristics (silica and alumina) were impregnated with ILs by physical wet method. Imidazolium based IL combined with [Br]and [Tf 2 N]anions were used in impregnation process. CO 2 sorption capacity and selectivity (CO 2 /N 2) of these materials were investigated. The best results regarding CO 2 /N 2 selectivity and CO 2 sorption were obtained with [Tf 2 N]anion. In relation to solid support, commercial alumina exhibited enhanced CO 2 uptake and higher selective capacity (CO 2 /N 2) (6.1 (± 0.1)). Combination of commercial alumina as support and 20 wt% of mbmim [Tf 2 N] resulted in higher CO 2 /N 2 selectivity of 9.5 ± 1.0. In addition, this material also showed fast sorption kinetics when compared to pure IL besides reuse capacity.

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Section: Influence Of Anion On Co 2 Sorption Capacitymentioning

confidence: 92%

“…As seen, ILs immobilization improves silica samples selectivity. This behavior is probably related to imidazolium ring polarity 58,59 and IL content 60 . Yet, ionic liquids have more affinity for CO 2 when compared to other gases such as CH 4 and N 2 61 .…”

Section: Influence Of Anion On Co 2 Sorption Capacitymentioning

confidence: 98%

Imidazolium-based Ionic Liquids Impregnated in Silica and Alumina Supports for CO2 Capture

et al. 2019

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“…A suitable CO 2 adsorbent should have a high specific surface area, a high porosity with proper pore sizes, a favorable surface chemistry, and a high chemical/ mechanical stability. Many CO 2 adsorbents based on different materials, such as zeolites (Banerjee et al 2009;Cavenati et al 2004;Kongnoo et al 2017;Ojuva et al 2013), silica gels (Arellano et al 2016), activated carbon (Fujiki and Yogo 2016;Roberts et al 2017;Singh et al 2017), and metal-organic frameworks (An and Rosi 2010;Millward and Yaghi 2005;Salehi and Anbia 2017), have been investigated in recent decades. However, adsorbents based on these materials have some drawbacks, such as their high cost, complex preparation methods, toxicities, and the use of corrosive materials during their preparation.…”

Section: Introductionmentioning

confidence: 99%

Lightweight, flexible, and multifunctional anisotropic nanocellulose-based aerogels for CO2 adsorption

et al. 2020

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CO 2 adsorption is a promising strategy to reduce costs and energy use for CO 2 separation. In this study, we developed CO 2 adsorbents based on lightweight and flexible cellulose nanofiber aerogels with monolithic structures prepared via freeze-casting, and cellulose acetate or acetylated cellulose nanocrystals (a-CNCs) were introduced into the aerogels as functional materials using an impregnation method to provide CO 2 affinity. The microstructure of the adsorbent was examined using scanning electron microscopy, and compression tests were performed to analyze the mechanical properties of the adsorbents. The CO 2 adsorption behavior was studied by recording the adsorption isotherms and performing column breakthrough experiments. The samples showed excellent mechanical performance and had a CO 2 adsorption capacity of up to 1.14 mmol/g at 101 kPa and 273 K. Compared to the adsorbent which contains cellulose acetate, the one impregnated with a-CNCs had better CO 2 adsorption capacity and axial mechanical properties owing to the building of a nanoscale scaffold on the surface of the adsorbent. Although the CO 2 adsorption capacity could be improved further, this paper reports a potential CO 2 adsorbent that uses all cellulose-based materials, which is beneficial for the environment from both resource and function perspectives. Moreover, the interesting impregnation process provides a new method to attach functional materials to aerogels, which have potential for use in many other applications.

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“…A few MOF-CNT composites have already been described with regard to applications in different fields. For example, there are studies regarding the adsorption of hydrogen, [40][41][42][43] carbon dioxide, [44][45][46][47][48][49] and the removal of organic pollutants. [50,51] Furthermore, there are studies for the use as separators, [52,53] phase change materials, [54] oxidation catalysts [55] or various detectors.…”

Section: Introductionmentioning

confidence: 99%

Electrically Conducting Nanocomposites of Carbon Nanotubes and Metal‐Organic Frameworks with Strong Interactions between the two Components

et al. 2019

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Highly integrated nanocomposites of Zr‐based metal‐organic frameworks (MOFs) of the UiO‐66 class and multi‐wall carbon nanotubes (MWCNTs) are prepared by direct crystallization of MOFs in the presence of CNTs. Powder samples with homogeneously distributed and strongly intergrown nanotubes and nanoparticles are obtained. Growth of the MOFs in the presence of CNTs deposited on glass slides yields open or compact coatings of the nanocomposites. The materials combine the high porosity and versatility of MOFs with the high electrical conductivities of CNTs. Upon increasing the amount of CNTs in the synthesis, the electrical conductivity shows a clear percolation behavior. Even with small amounts of CNTs, high conductivities are observed. SEM and TEM pictures show the strong intergrowth between the CNTs and the MOF nanoparticles. Crystallization times are shorter in the presence of CNTs, and CNTs run centrally through the MOF crystals. These facts indicate that the CNTs serve as heterogeneous nucleation centers for the formation of MOF nanocrystals. Sensing experiments performed on the coatings show significant changes in the electrical conductivities of the nanocomposite materials in the presence of different analytes, which are also discernable from the changes observed on bare CNTs. This is further proof for the close interaction between the components of the nanocomposites.

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High CO₂ Adsorption Capacity and CO₂/CH₄ Selectivity by Nanocomposites of MOF-199

Cited by 117 publications

References 47 publications

Imidazolium-based Ionic Liquids Impregnated in Silica and Alumina Supports for CO2 Capture

Imidazolium-based Ionic Liquids Impregnated in Silica and Alumina Supports for CO2 Capture

Lightweight, flexible, and multifunctional anisotropic nanocellulose-based aerogels for CO2 adsorption

Electrically Conducting Nanocomposites of Carbon Nanotubes and Metal‐Organic Frameworks with Strong Interactions between the two Components

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