Identifying the Point of Attachment in the Hypercrosslinking of Benzene for the Synthesis of a Nanoporous Polymer as a Superior Adsorbent for High-Pressure CO<sub>2</sub> Capture Application

Rawat, Anuj; Muhammad, Raeesh; Srivastava, Vimal Chandra; Mohanty, Paritosh

doi:10.1021/acs.macromol.2c02449

Cited by 14 publications

(13 citation statements)

References 34 publications

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“…The Brunauer–Emmett–Teller (BET) was used to calculate the specific surface area. The PSD of the catalysts was calculated by the density functional theory method, as reported by Rawat et al The desorption branch data were used to calculate the PSD.…”

Section: Methodsmentioning

confidence: 99%

“…The Brunauer−Emmett−Teller (BET) was used to calculate the specific surface area. was calculated by the density functional theory method, as reported by Rawat et al 29 The desorption branch data were used to calculate the PSD. The crystalline phases and the crystallite structures of the reduced catalyst were determined by powder X-ray diffraction (XRD).…”

Section: Catalyst Characterizationmentioning

confidence: 99%

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Tri-reforming of CH₄ over a Thermally Stable and Carbon-Resistant Nanonickel Metal Catalyst Dispersed on Mesoporous-Zirconia

Pandey,

Biswas,

Pant

et al. 2024

Ind. Eng. Chem. Res.

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A novel nanonickel metal catalyst dispersed on mesoporous-zirconia is developed for the controlled production of the synthesis gas with an H 2 /CO molar ratio of 1.5−2 via the trireforming of methane (TRM). The catalysts were tested in a fixedbed reactor at 600−850 °C and 1 atm. At the optimum feed (CH 4 / CO 2 /O 2 /H 2 O/N 2 ) ratio of 1:0.5:0.1:0.0125:1, the maximum CO 2 and CH 4 conversion was ∼28 and ∼86%, respectively, over the 5 wt % Ni/ZrO 2 . At this condition, the syngas with an H 2 /CO ratio of ∼1.5 was achieved at a lower reaction temperature of 700 °C. The superior activity of this catalyst was due to the presence of highly dispersed and reduced nickel particles over the combined tetragonal and monoclinic phases of mesoporous ZrO 2 . The basic strength of the catalyst, the nickel particle size, and metal dispersion played vital roles in controlling the TRM activity as well as the H 2 /CO ratio. The time-on-stream study and the used catalyst characterization results established that the nanosized nickel metal particles dispersed on mesoporous zirconia were thermally stable and coke-resistant.

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Section: Methodsmentioning

confidence: 99%

Section: Catalyst Characterizationmentioning

confidence: 99%

Tri-reforming of CH₄ over a Thermally Stable and Carbon-Resistant Nanonickel Metal Catalyst Dispersed on Mesoporous-Zirconia

Pandey,

Biswas,

Pant

et al. 2024

Ind. Eng. Chem. Res.

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“…Synthesis of NENP was carried out by the polycondensation of cyanuric chloride (CC) and melamine at 413 K for 30 min as reported by our research group previously (Scheme ). , A quick and facile microwave-assisted method was used for the synthesis. − …”

Section: Experimental Detailsmentioning

confidence: 99%

Fabrication of a Mixed Matrix Membrane Using Nitrogen-Enriched Nanoporous Polytriazine for Removal of Pb²⁺ from Aqueous Solution

Das,

Rawat,

Chaudhary

et al. 2024

ACS Appl. Nano Mater.

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An important concern for the environment is the toxicity of lead ions in aqueous solutions. In the present research, a nitrogen-enriched nanoporous polytriazine (NENP) is synthesized (SABET ∼ 700 m2 g–1), which works well as an adsorbent to remove Pb2+ from water bodies. In batch adsorption mode, 5 mg of NENP having a high nitrogen content (∼52%) is capable of reducing the concentration of Pb2+ from 1.6 ppm to <10 ppb within 10 min, at 298 K and a pH of 7. The maximum adsorption capacity of 537 mg g–1 is estimated in 10 min for 600 ppm of Pb2+ solution having a pH of 7. Meanwhile, a mixed matrix membrane designated as N-MMM was fabricated using NENP as the active adsorbent and characterized by field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and N2 sorption analysis. In a cross-flow membrane setup, N-MMM with the flux of 16.2 L m–2 h–1 can treat 5 L of an aqueous solution containing 1.6 ppm of Pb2+ and provide safe drinking water (<10 ppb by WHO) for 300 min within the permissible limit (WHO) at 2 bar transmembrane pressure and a cross-flow velocity of 1L/M. N-MMM exhibits a remarkably high removal efficiency of 99.4% and good retention ability up to 3 consecutive cycles. These findings will be beneficial for the cost-effective production of metal-free heteroatom-enriched nanoporous materials for efficient removal of Pb2+ ions from water bodies.

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“…The obtained whitish-yellow powdered product was washed several times with water and ethanol and finally dried at 343 K overnight in a vacuum oven. 42,43…”

Section: Synthesis Of Cyclophosphazene and Triazine Moietiey-based In...mentioning

confidence: 99%

Removal of Uranium from Aqueous Solution and Simulated Seawater Using a Mixed Matrix Membrane Fabricated by Cyclophosphazene and Triazine-Based Inorganic–Organic Hybrid Material

Das

Rawat

Singh

et al. 2023

ACS Appl. Eng. Mater.

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The efficient removal of uranium ions from aqueous and simulated seawater is reported by using a mixed matrix membrane (MMM-2) fabricated by cyclophosphazene and triazine-based inorganic−organic hybrid material (CTHM-2) as the adsorbent. CTHM-2 with a specific surface area of 76 m 2 g −1 was synthesized within 60 min by microwave-assisted polycondensation reaction. In batch mode adsorption, the concentration of uranium has been decreased from 5 ppm to <15 ppb (permissible limit of uranium by the World Health Organization) within 120 min at pH of 6 and 298 K. However, a maximum adsorption capacity of 580 mg g −1 is estimated with 500 ppm of the initial concentration. The isotherm and kinetic studies indicate that it could fit well with the Freundlich isotherm and pseudo-second order kinetics. The negative ΔG and ΔH values indicate the spontaneous and exothermic adsorption processes, respectively. When the MMM-2 was used to treat 5 L of 5 ppm U(VI) solution, with a water flux of 8.1 L m −2 h −1 and 2 bar transmembrane pressure, it provides safe drinkable water (<15 ppb) for 300 min. Additionally, the CTHM-2 and MMM-2 could be further used to remove uranium ions from the simulated seawater with adsorption capacities of 53 and 167 mg g −1 , respectively.

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Identifying the Point of Attachment in the Hypercrosslinking of Benzene for the Synthesis of a Nanoporous Polymer as a Superior Adsorbent for High-Pressure CO₂ Capture Application

Cited by 14 publications

References 34 publications

Tri-reforming of CH₄ over a Thermally Stable and Carbon-Resistant Nanonickel Metal Catalyst Dispersed on Mesoporous-Zirconia

Tri-reforming of CH₄ over a Thermally Stable and Carbon-Resistant Nanonickel Metal Catalyst Dispersed on Mesoporous-Zirconia

Fabrication of a Mixed Matrix Membrane Using Nitrogen-Enriched Nanoporous Polytriazine for Removal of Pb²⁺ from Aqueous Solution

Removal of Uranium from Aqueous Solution and Simulated Seawater Using a Mixed Matrix Membrane Fabricated by Cyclophosphazene and Triazine-Based Inorganic–Organic Hybrid Material

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Identifying the Point of Attachment in the Hypercrosslinking of Benzene for the Synthesis of a Nanoporous Polymer as a Superior Adsorbent for High-Pressure CO2 Capture Application

Cited by 14 publications

References 34 publications

Tri-reforming of CH4 over a Thermally Stable and Carbon-Resistant Nanonickel Metal Catalyst Dispersed on Mesoporous-Zirconia

Tri-reforming of CH4 over a Thermally Stable and Carbon-Resistant Nanonickel Metal Catalyst Dispersed on Mesoporous-Zirconia

Fabrication of a Mixed Matrix Membrane Using Nitrogen-Enriched Nanoporous Polytriazine for Removal of Pb2+ from Aqueous Solution

Removal of Uranium from Aqueous Solution and Simulated Seawater Using a Mixed Matrix Membrane Fabricated by Cyclophosphazene and Triazine-Based Inorganic–Organic Hybrid Material

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Identifying the Point of Attachment in the Hypercrosslinking of Benzene for the Synthesis of a Nanoporous Polymer as a Superior Adsorbent for High-Pressure CO₂ Capture Application

Tri-reforming of CH₄ over a Thermally Stable and Carbon-Resistant Nanonickel Metal Catalyst Dispersed on Mesoporous-Zirconia

Tri-reforming of CH₄ over a Thermally Stable and Carbon-Resistant Nanonickel Metal Catalyst Dispersed on Mesoporous-Zirconia

Fabrication of a Mixed Matrix Membrane Using Nitrogen-Enriched Nanoporous Polytriazine for Removal of Pb²⁺ from Aqueous Solution