Review of Recent Developments in CO2 Capture Using Solid Materials: Metal Organic Frameworks (MOFs)

Mohamedali, Mohanned; Nath, Devjyoti; Ibrahim, Hussameldin; Henni, Amr

doi:10.5772/62275

Cited by 31 publications

(37 citation statements)

References 177 publications

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“…One of the main challenges is the increase in atmospheric CO 2 concentration 1 . According to measurements, the mean CO 2 level value is the highest already registered till date 1,2 .…”

Section: Introductionmentioning

confidence: 99%

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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“…One of the main challenges is the increase in atmospheric CO 2 concentration 1 . According to measurements, the mean CO 2 level value is the highest already registered till date 1,2 .…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…Metal organic frameworks (MOFs) are emerging adsorbents that are characterized by high surface area, high porosity and tunable surface functionality [61,62]. MOFs are composed of metal ions or metal cluster vertices joined by organic ligands resulting in a network.…”

Section: Adsorptionmentioning

confidence: 99%

“…Under 20 bar, this material demonstrated a CO 2 uptake capacity of 23.83 and 19.85 mmol/g at 0 and 25°C respectively, 74.5% higher than typical zeolite 5A at 14 bar [64]. There is growing research on ways to further improve the performance of MOFs for CC [61].…”

Section: Adsorptionmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

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With the concentration of CO 2 in the atmosphere increasing beyond sustainable limits, much research is currently focused on developing solutions to mitigate this problem. Possible strategies involve sequestering the emitted CO 2 for long-term storage deep underground, and conversion of CO 2 into value-added products. Conventional processes for each of these solutions often have high-capital costs associated and kinetic limitations in different process steps. Additionally, CO 2 is thermodynamically a very stable molecule and difficult to activate. Despite such challenges, a number of methods for CO 2 capture and conversion have been investigated including absorption, photocatalysis, electrochemical and thermochemical methods. Conventional technologies employed in these processes often suffer from low selectivity and conversion, and lack energy efficiency. Therefore, suitable process intensification techniques based on equipment, material and process development strategies can play a key role at enabling the deployment of these processes. In this review paper, the cutting-edge intensification technologies being applied in CO 2 capture and conversion are reported and discussed, with the main focus on the chemical conversion methods.

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“…The amine loading aims to simultaneously increase the SSA and affinity towards H 2 S molecules without hampering diffusion and accessibility of H 2 S molecules in the internal pores and surface of the MOFs. That said, controlled grafting at molecular precision is critical to prevent the blockage of the pores, and therefore forestall the access of the functional moieties inside the pore volume, while the amine groups are attached to the open metal sites [128]. However, this method is not efficient in competitive CO 2 /H 2 S adsorption since both gases are electron acceptors (Lewis acids) and they have similar effect with amine.…”

Section: Connection Between Functions and Structural Features Of Mofsmentioning

confidence: 99%

Hydrogen Sulfide (H2S) Removal via MOFs

et al. 2020

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The removal of the environmentally toxic and corrosive hydrogen sulfide (H2S) from gas streams with varying overall pressure and H2S concentration is a long-standing challenge faced by the oil and gas industries. The present work focuses on H2S capture using a relatively new type of material, namely metal-organic frameworks (MOFs), in an effort to shed light on their potential as adsorbents in the field of gas storage and separation. MOFs hold great promise as they make possible the design of structures from organic and inorganic units, but also as they have provided an answer to a long-term challenging objective, i.e., how to design extended structures of materials. Moreover, in designing MOFs, one may functionalize the organic units and thus, in essence, create pores with different functionalities, and also to expand the pores in order to increase pore openings. The work presented herein provides a detailed discussion, by thoroughly combining the existing literature on new developments in MOFs for H2S removal, and tries to provide insight into new areas for further research.

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Review of Recent Developments in CO2 Capture Using Solid Materials: Metal Organic Frameworks (MOFs)

Cited by 31 publications

References 177 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

Process intensification technologies for CO2 capture and conversion – a review

Hydrogen Sulfide (H2S) Removal via MOFs

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