Trace CO
            <sub>2</sub>
            capture by an ultramicroporous physisorbent with low water affinity

Mukherjee, Soumya; Sikdar, Nivedita; O’Nolan, Daniel; Franz, Douglas M.; Gascón, Victoria; Kumar, Amrit; Kumar, Naveen; Scott, Hayley S.; Madden, David G.; Kruger, Paul E.; Space, Brian; Zaworotko, Michael J.

doi:10.1126/sciadv.aax9171

Cited by 151 publications

(139 citation statements)

References 41 publications

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“…To investigate the reaction mechanism, we performed a detailed assessment of the reaction intermediates and the by-products generated during CO 2 reduction. The overall reaction process in DMF is described by chemical reaction equations (1)(2)(3)(4)(5)(6). The equations are separated into 'liquid metal components' reactions (equations (1-4)) and 'solid components' reactions (equations (5,6)).…”

Section: Reaction Mechanismmentioning

confidence: 99%

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Mechanical energy-induced CO2 conversion using liquid metals

Tang¹,

Tang²,

Mayyas³

et al. 2020

Preprint

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We report a green carbon capture and conversion technology offering scalability and economic viability for mitigating CO2 emissions. The technology uses suspensions of gallium liquid metal to reduce CO2 into carbonaceous solid products and O2 at near room temperature. The nonpolar nature of the liquid gallium interface allows the solid products to instantaneously exfoliate, hence keeping active sites accessible. The solid co-contributor of silver-gallium rods ensures a cyclic sustainable process. The overall process relies on mechanical energy as the input, which drives nano dimensional triboelectrochemical reactions. By altering the secondary solvent and changing the reactor height, the dissolution and conversion efficiency can be tuned. The optimum reactor height is only 27 cm, when gallium/silver fluoride mix at 7:1 mass ratio is employed as the reaction material. At CO2 input of ~8 sccm, 92% efficiency was obtained at the record low input energy of 228.5 kW∙h for the capture and conversion of a tonne of CO2. The potential impact of this green technology is remarkable, likely benefiting a variety of industries and offering an economical solution for CO2 capture and conversion.

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Section: Reaction Mechanismmentioning

confidence: 99%

“…Innovative technologies are urgently demanded for capturing and converting CO 2 into value-added species, at low input energy, to mitigate the negative effects of this greenhouse gas and support a sustainable carbon cycle 1,2 . Activating CO 2 into CO 2…”

Section: Main Textmentioning

confidence: 99%

Mechanical energy-induced CO2 conversion using liquid metals

Tang¹,

Tang²,

Mayyas³

et al. 2020

Preprint

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show abstract

“…Among the physisorption materials, anion-functionalized MOFs are a new sub-class of porous materials constructed by the metal moiety, organic linkers, and inorganic anions. The reticular design strategy enables the precise control over the pore chemistry of anion-functionalized MOFs by exploitation of molecular blocks [23][24][25][26][27][28][29][30][31][32]. Previous study reported by Eddaoudi's group [8] showed that, at a low concentration of 400 ppm and 298 K, NbOFFIVE-1-Ni and SIFSIX-3-Cu adsorbs 1.3 and 1.2 mmol g −1 CO 2 , respectively.…”

Section: Introductionmentioning

confidence: 99%

阴离子功能化超微孔mof高效选择性捕获低浓度 Co2

et al. 2020

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CO 2 capture, especially under low-pressure range, is of significance to maintain long-duration human operation in confined spaces and decrease the CO 2 corrosion and freezing effect for the liquefaction of natural gas. Herein, we for the first time report a novel anion-functionalized ZU-16-Co (TIFSIX-3-Co, TIFSIX=hexafluorotitanate (TiF 6 2−), 3=pyrazine), which exhibits one-dimensional pore channels decorated by abundant F atoms, for efficient CO 2 capture at a concentration around 400-10,000 ppm. Among its isostructural MFSIX-3 (M=Si, Ti, Ge) family materials, ZU-16-Co with fine-tuned pore size of 3.62 Å exhibits the highest CO 2 uptake at 0.01 bar (10,000 ppm) and 1 bar (2.63 and 2.87 mmol g −1 , respectively). The high CO 2 capture ability of ZU-16-Co originates from the fine-tuned pore dimensions with strong F•••C=O host-guest interactions and relatively large pore volumes coming from its longer coordinated Ti-F-Co distance (3.9 Å) in c direction. The excellent carbon trapping performance was further verified by dynamic breakthrough tests for CO 2 /N 2 (1/99 and 15/85) and CO 2 /CH 4 (50/ 50) mixtures. The adsorption and separation performances, resulting from the fine-tuned pore system with periodic arrays of exposed functionalities, demonstrate that ultramicroporous ZU-16-Co can be a promising adsorbent for low-concentration carbon capture.

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“…To date, the most effective way is carbon capture and storage (CCS) based on solid adsorbents. 6,7 Currently, a wide range of materials with ne structural and chemical properties have been investigated as possible CO 2 captors at low (303-353 K) or high (T > 473 K) temperatures, such as various activated carbons, [8][9][10] zeolites, [11][12][13] silicates, [14][15][16] metal oxides, [17][18][19] metal-organic frameworks (MOFs) [20][21][22][23][24][25] and zirconates/aluminates, [26][27][28][29] each presenting some advantages and disadvantages. Solid sorbents impregnated or graed with polyamines and related groups are widely researched materials, which combine the advantages of both the amine group and solid materials to maximize the sorption properties.…”

Section: Introductionmentioning

confidence: 99%

“…30 However, the thermal stability of the amine group employed should be considered carefully for long term implementation, which is particularly important when the adsorbent is subject to steam stripping and/or high temperature regeneration. In addition, MOFs [20][21][22][23][24][25] have been extensively investigated in carbon storage/separation due to their enriched morphological texture, chemical tunability, highly available porous surface, aromaticity and densely coordinated unsaturated metal sites. However, most MOF adsorbents exhibit decreased CO 2 uptake capacities under wet conditions.…”

Section: Introductionmentioning

confidence: 99%