Fabrication of ultramicroporous triphenylamine-based polyaminal networks for low-pressure carbon dioxide capture

Rong, Meng; Yang, Liangrong; Wang, Li; Yu, Jing; Qu, Hongnan; Liu, Huizhou

doi:10.1016/j.jcis.2019.04.036

Cited by 34 publications

(31 citation statements)

References 52 publications

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“…In Figure 3 , the powder X-ray diffraction (PXRD) pattern of PAN-NA reveals a wide peak, positioned around 2θ = 20°, corresponding to the most amorphous part [ 5 , 23 ]. The lack of any sharp peaks may indicate the absence of melamine, meaning that all melamine has been reacted.…”

Section: Resultsmentioning

confidence: 99%

“…Then, in the intermediate pressure range, nearly horizontal adsorption occurs. Furthermore, when relative pressure (P/P 0 ) surpasses 0.8, N 2 uptake increases dramatically, indicating the presence of bigger mesopores, which are mostly caused by interparticle voids induced by loose packing of fine particles, as demonstrated by SEM micrographs ( Figure 4 ) [ 23 , 25 , 26 ]. On the other hand, the polymer exhibits reversible adsorption–desorption isotherms, which differ from the hysteresis phenomena commonly reported in many other porous organic polymers due to pore structural deformation during measurements in liquid N 2 .…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of Naphthalene-Based Polyaminal-Linked Porous Polymers for Highly Effective Uptake of CO2 and Heavy Metals

et al. 2022

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Studying the effect of functional groups on the porosity structure and adsorption efficiency of polymer materials is becoming increasingly interesting. In this work, a novel porous polyaminal-linked polymer, based on naphthalene and melamine (PAN-NA) building blocks, was successfully synthesized by a one-pot polycondensation method, and used as an adsorbent for both CO2 and heavy metals. Fourier transform infrared spectroscopy, solid-state 13 C NMR, powder X-ray diffraction, and thermogravimetry were used to characterize the prepared polymer. The porous material structure was established by field-emission scanning electron microscope and N2 adsorption–desorption methods at 77 K. The polymer exhibited excellent uptake of CO2, 133 mg/g at 273 K and 1 bar. In addition, the adsorption behavior of PAN-NA for different metal cations, including Pb(II), Cr(III), Cu(II), Cd(II), Ni(II), and Ba(II), was investigated; a significant adsorption selectivity toward the Pb(II) cation was detected. The influence of pH, adsorbent dose, initial concentrations, and contact time was also assessed. Our results prove that the introduction of naphthalene in the polymer network improves the porosity and, thus, CO2 adsorption, as well as the adsorption of heavy metals.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synthesis of Naphthalene-Based Polyaminal-Linked Porous Polymers for Highly Effective Uptake of CO2 and Heavy Metals

et al. 2022

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“…In particular, the CO 2 uptakes of NPC-600-4 can reach 2.29 mmol/g and 1.23 mmol/g at 0.15 bar, which is a typical CO 2 partial pressure of flue gas. These values surpass some typical solid sorbents under identical measurement conditions, such as MOFs [ 7 ], covalent organic framework [ 10 ], zeolites [ 8 ] and N-rich porous organic polymer [ 51 ]. Interestingly, NPC-500-4 has the second largest CO 2 uptake at low pressure (P < 0.4 bar, 273 K and P < 1 bar, 298 K), which is due to its higher amine content and large ultramicropore volume.…”

Section: Resultsmentioning

confidence: 89%

“…The dependencies of the Q st and CO 2 adsorption capacity are shown in Figure 9 . For each sample, the Q st values greatly decrease with the CO 2 uptake, suggesting that the interaction between the CO 2 molecules and the porous N-doped carbon surface is much stronger than that between the CO 2 molecules [ 50 , 51 ]. Moreover, the ranking order of the Q st values is basically consistent with the order of the CO 2 uptakes.…”

Section: Resultsmentioning

confidence: 99%

One-Pot Synthesis of Rubber Seed Shell-Derived N-Doped Ultramicroporous Carbons for Efficient CO2 Adsorption

2022

Self Cite

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In this work, a series of novel rubber seed shell-derived N-doped ultramicroporous carbons (NPCs) were prepared by one-step high-temperature activation (500–1000 °C), using melamine as the nitrogen source and KOH as the activator. The effects of the melamine dosage and the activation temperatures on the surface chemical properties (doped N contents and N species), textural properties (surface area, pore structure, and microporosity), CO2 adsorption capacities, and CO2/N2 selectivity were thoroughly investigated and characterized. These as-prepared NPCs demonstrate controllable BET surface areas (398–2163 m2/g), ultramicroporosity, and doped nitrogen contents (0.82–7.52 wt%). It was found that the ultramicroporosity and the doped nitrogens significantly affected the CO2 adsorption and the separation performance at low pressure. Among the NPCs, highly microporous NPC-600-4 demonstrates the largest CO2 adsorption capacity of 5.81 mmol/g (273 K, 1.0 bar) and 3.82 mmol/g (298 K, 1.0 bar), as well as a high CO2/N2 selectivity of 36.6, surpassing a lot of reported biomass-based porous carbons. In addition, NPC-600-4 also shows excellent thermal stability and recycle performance, indicating the competitive application potential in practical CO2 capture. This work also presents a facile one-pot synthesis method to prepare high-performance biomass-based NPCs.

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“…Polymers have also shown excellent reusability [75] and low heat of adsorption [77]. The works of [11,15,18,69,73,[78][79][80][81][82][83][84][85] highlight the use of polymers for CO 2 , SO 2 , NH 3, and H 2 S sequestration.…”

Section: Polymersmentioning

confidence: 99%

Adsorbents for Noxious Gas Sequestration: State of the Art

Aimikhe

Eyankware

2019

JSRR

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Adsorbents such as metal-organic frameworks (MOFs), polymers, activated carbon (AC), and membranes are becoming prominent for CO2, SO2, H2S and NH3 capture and in some cases, storage. Using the standard adsorbent properties (SAPs) such as adsorption capacity, selectivity, permeability/permeance, regenerability and reusability, ease of functionability and tunability, thermal and chemical stability, suitable candidates for noxious gas sequestration can be determined. To foster the development and selection of a more efficient adsorbent, proper documentation of adsorbent performance in terms of SAPs is crucial. In this study, a critical review of metal-organic framework (MOF), polymer, activated carbon (AC) and membrane adsorbents was performed. Using the SAPs, an up to date comparative analysis was done to select the best performing adsorbents. The results of the comparative analysis were then used to categorize the adsorbents' suitability for pre-combustion and post-combustion applications. A perspective of future study on adsorbents for noxious gas sequestration was also presented.

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Fabrication of ultramicroporous triphenylamine-based polyaminal networks for low-pressure carbon dioxide capture

Cited by 34 publications

References 52 publications

Synthesis of Naphthalene-Based Polyaminal-Linked Porous Polymers for Highly Effective Uptake of CO2 and Heavy Metals

Synthesis of Naphthalene-Based Polyaminal-Linked Porous Polymers for Highly Effective Uptake of CO2 and Heavy Metals

One-Pot Synthesis of Rubber Seed Shell-Derived N-Doped Ultramicroporous Carbons for Efficient CO2 Adsorption

Adsorbents for Noxious Gas Sequestration: State of the Art

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