An ethylenediamine-grafted Y zeolite: a highly regenerable carbon dioxide adsorbent via temperature swing adsorption without urea formation

Kim, Chaehoon; Cho, Hae Sung; Chang, Shuai; Cho, Sung June; Choi, Minkee

doi:10.1039/c6ee00601a

Cited by 123 publications

(98 citation statements)

References 57 publications

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“…S35 †). 4,5,7,8,10,11,[13][14][15][20][21][22][23][24][25][26][27][28][29][30][31][32][33] Here, it is worth noting that the pore volume of our exfGO samples is much higher than those reported in the literature for amine impregnation.…”

Section: 7813-1521-28contrasting

confidence: 50%

“…Due to their ultrahigh pore volume, exfGO-D samples can accept a record high TETA loading of z10 g g À1 of sample, without any sign of surface wetting (Table S6 †). 4,7,8,[13][14][15][21][22][23][24][25][26][27][28] Indeed, SEM micrographs still show void spaces for a TETA loading as high as 7.0 g g À1 in the exfGO-D sample (Fig. S26 †).…”

Section: 7813-1521-28mentioning

confidence: 85%

“…5b). 4,7,8,[13][14][15][21][22][23][24][25][26][27][28]32,33 Here it is worth noting that the capacity loss of z21% in our TEPA@exfGO sample is arguably smaller than the z40% capacity loss from TEPA@mesoporous silica capsules, under similar synthetic and experimental conditions.…”

Section: 7813-1521-28mentioning

confidence: 93%

“…4c, S30, Tables S6 and S8 †). 4,5,7,8,10,11,[13][14][15][20][21][22][23][24][25][26][27][28][29][30][31][32][33] These uptake capacities are further conrmed under a simulated ue-gas stream of z100 ml min À1 , consisting of only 15% of CO 2 in N 2 , bubbled through water. A CO 2 capture of 35-40 wt% from the ue-gas is attained at 75 C ( Fig.…”

Section: 7813-1521-28mentioning

confidence: 99%

“…The recent efforts on the introduction of CO 2 -philic amine groups into nanoporous structures have led to a large enhancement in selective carbon (CO 2 ) capture and effluent ue-gas tolerance. 4,7,8 However, the practical feasibility of these materials for CO 2 capture is compromised by the lack of a simple and large-scale synthesis method. Substantial improvements in both the structural stability and scalable synthesis of these materials are therefore urgently needed.…”

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confidence: 99%

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Design of hyperporous graphene networks and their application in solid-amine based carbon capture systems

Gadipelli

Skipper

et al. 2017

J. Mater. Chem. A

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We demonstrate a simple and fully scalable method for obtaining hierarchical hyperporous graphene networks of ultrahigh total pore volume by thermal-shock exfoliation of graphene-oxide (exfGO) at a relatively mild temperature of 300 C. Such pore volume per unit mass has not previously been achieved in any type of porous solid. We find that the amount of oxidation of starting graphene-oxide is the key factor that determines the pore volume and surface area of the final material after thermal shock. Specifically, we emphasize that the development of the hyperporosity is directly proportional to the enhanced oxidation of sp 2 C]C to form C]O/COO. Using our method, we reproducibly synthesized remarkable meso-/macroporous graphene networks with exceptionally high total pore volumes, exceeding 6 cm 3 g À1. This is a step change compared to #3 cm 3 g À1 in conventional GO under similar synthetic conditions.Moreover, a record high amine impregnation of >6 g g À1 is readily attained in exfGO samples (solid-amine@exfGO), where amine loading is directly controlled by the pore-structure and volume of the host materials. Such solid-amine@exfGO samples exhibit an ultrahigh selective flue-gas CO 2 capture of 30-40 wt% at 75 C with a working capacity of z25 wt% and a very long cycling stability under simulated flue-gas stream conditions. To the best of our knowledge, this is the first report where a graphene-oxide based hyperporous carbon network is used to host amines for carbon capture application with exceptionally high storage capacity and stability.The widespread implementation of clean energy technologies, such as CCS (carbon capture and sequestration), fuel cells, batteries, supercapacitors, water electrolysers, and/or molecular storage and transport, is critical to tackle climate change and energy security issues. [1][2][3][4][5] In this regard, nanoporous carbons, metal-organic frameworks (MOFs), polymers and zeolites have gained tremendous attention as storage, transport and conversion media.2-7 Considerable performance improvements have been achieved by synthesizing and manipulating their functional features and porous structures.6 In the case of CO 2 capture, obtaining high enough CO 2 uptake capacities by using sorbent based materials under ue-gas conditions is still a challenging task. Many sorbent materials show good CO 2 uptake capacities but only at 0 C or 25 C and for 100% dry CO 2 .Porous sorbents including zeolites, activated carbons and MOFs do not show desirable selective CO 2 uptake under humid conditions and/or at >50 C. 8 This is a major setback for the implementation of CCS. The recent efforts on the introduction of CO 2 -philic amine groups into nanoporous structures have led to a large enhancement in selective carbon (CO 2 ) capture and effluent ue-gas tolerance. 4,7,8 However, the practical feasibility of these materials for CO 2 capture is compromised by the lack of a simple and large-scale synthesis method. Substantial improvements in both the structural stability and scalable synthesis of these...

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Section: 7813-1521-28contrasting

confidence: 50%

Section: 7813-1521-28mentioning

confidence: 85%

Section: 7813-1521-28mentioning

confidence: 93%

Section: 7813-1521-28mentioning

confidence: 99%

mentioning

confidence: 99%

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Design of hyperporous graphene networks and their application in solid-amine based carbon capture systems

Gadipelli

Skipper

et al. 2017

J. Mater. Chem. A

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Engineering Surface Amine Modifiers of Ultrasmall Gold Nanoparticles Supported on Reduced Graphene Oxide for Improved Electrochemical CO₂ Reduction

Zhao

Wang

Liu

et al. 2018

Advanced Energy Materials

107

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Ultrasmall gold (Au) nanoparticles with high mass activity have great potential for practical applications in CO2electroreduction. However, these nanoparticles often suffer from poor product selectivity since their abundant low-coordinated sites are favorable for H2evolution. In this work, a catalyst, reduced graphene oxide supported ultrasmall Au nanoparticles (≈2.4 nm) is developed which delivers high Auspecific mass activities (>100 A g-1) and good Faradaic efficiencies (32-60%) for the CO2-to-CO conversion at moderate overpotentials (450-600 mV). The efficiencies can be improved to 59-75% while retaining the ultrahigh mass activities via a simple amine-modification strategy. In addition, an aminestructure-dependent effect is revealed: linear amines promote the CO formation whereas the branched polyamine greatly depresses it; the increasing alkyl chain length boosts the promotion effect of linear amines. The strong Au-amine interaction and molecular configuration induced amine coverage on the ultrasmall Au NPs may contribute to this effect.

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Porous Organic Salts: Diversifying Void Structures and Environments

et al. 2022

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Porous organic salts (POSs) are porous organic materials, in which various aromatic sulfonic acids and amines are regularly self-assembled by chargeassisted hydrogen bonding. POSs exhibit high solubility in highly polar solvents. Therefore, they are prepared via facile recrystallization and exhibit high recyclability. In this study, tetrahedral-structured tetrasulfonic acid and triphenylmethylamine (TPMA) were combined to construct POSs with rigid diamond networks called diamondoid porous organic salts (d-POSs). Furthermore, by introducing substituents (e.g., F, Cl, Br, or I) at the para-positions of benzene rings of TPMA, these substituents were exposed on the void surface of d-POSs, and their diamond networks were distorted. This induced the formation of a variety of void structures and environments in the d-POSs, which significantly affected their gas adsorption behavior. In particular, the d-POS from TPMA substituted by fluorine exhibited very high CO 2 adsorption of 182 mL(STP) g À 1 at 1 atm in allorganic porous materials.

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An ethylenediamine-grafted Y zeolite: a highly regenerable carbon dioxide adsorbent via temperature swing adsorption without urea formation

Abstract: An ethylenediamine-grafted Y zeolite effectively adsorbs CO2 from a wet flue gas and it is highly regenerable through a temperature swing adsorption (TSA) process.

Cited by 123 publications

References 57 publications

Design of hyperporous graphene networks and their application in solid-amine based carbon capture systems

Design of hyperporous graphene networks and their application in solid-amine based carbon capture systems

Engineering Surface Amine Modifiers of Ultrasmall Gold Nanoparticles Supported on Reduced Graphene Oxide for Improved Electrochemical CO₂ Reduction

Porous Organic Salts: Diversifying Void Structures and Environments

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An ethylenediamine-grafted Y zeolite: a highly regenerable carbon dioxide adsorbent via temperature swing adsorption without urea formation

Abstract: An ethylenediamine-grafted Y zeolite effectively adsorbs CO2 from a wet flue gas and it is highly regenerable through a temperature swing adsorption (TSA) process.

Cited by 123 publications

References 57 publications

Design of hyperporous graphene networks and their application in solid-amine based carbon capture systems

Design of hyperporous graphene networks and their application in solid-amine based carbon capture systems

Engineering Surface Amine Modifiers of Ultrasmall Gold Nanoparticles Supported on Reduced Graphene Oxide for Improved Electrochemical CO2 Reduction

Porous Organic Salts: Diversifying Void Structures and Environments

Contact Info

Product

Resources

About

Engineering Surface Amine Modifiers of Ultrasmall Gold Nanoparticles Supported on Reduced Graphene Oxide for Improved Electrochemical CO₂ Reduction