CO2 adsorption and conversion into cyclic carbonates over a porous ZnBr2-grafted N-heterocyclic carbene-based aromatic polymer

Puthiaraj, Pillaiyar; Ravi, Seenu; Yu, Kwangsun; Ahn, Wha‐Seung

doi:10.1016/j.apcatb.2019.03.076

Cited by 136 publications

(58 citation statements)

References 58 publications

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“…This is because the accumulation of CO2 in the atmosphere is accelerating at a frightening pace and is considered the leading cause of the greenhouse effect over the past few decades [1][2][3][4]. Among these transformations, the synthesis of cyclic carbonates from epoxides and CO2 has attracted increasing attention due to their high efficiency in industrial processes [5][6][7][8][9][10]. For example, cyclic carbonates can be widely used as aprotic high-boiling polar solvents, electrolytes for lithium-ion batteries, precursors of polymeric materials, and fine chemical intermediates.…”

Section: Introductionmentioning

confidence: 99%

Ionization of a covalent organic framework for catalyzing the cycloaddition reaction between epoxides and carbon dioxide

Zhang

et al. 2020

Chinese Journal of Catalysis

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Section: Introductionmentioning

confidence: 99%

Ionization of a covalent organic framework for catalyzing the cycloaddition reaction between epoxides and carbon dioxide

Zhang

et al. 2020

Chinese Journal of Catalysis

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“…The (b) exhibited a characteristic peak at 617 cm −1 , which belonged to the vibrative absorption of C-Cl [36]. The absorption of C-Cl weakened and the characteristic peak of the imidazolium ring appeared at 1598 cm −1 and 1167 cm −1 after quaternization, which belonged to the imidazolium ring stretching of C=N and C-N, respectively [1, 6,37]. The preceding results indicated that imidazolium-based HIPs were successfully prepared.…”

Section: Characterization Of Polymersmentioning

confidence: 95%

Hypercrosslinked Ionic Polymers with High Ionic Content for Efficient Conversion of Carbon Dioxide into Cyclic Carbonates

Pei

et al. 2022

Catalysts

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The effective conversion of carbon dioxide (CO2) into cyclic carbonates requires porous materials with high ionic content and large specific surface area. Herein, we developed a new systematic post-synthetic modification strategy for synthesizing imidazolium-based hypercrosslinked ionic polymers (HIPs) with high ionic content (up to 2.1 mmol g−1) and large specific surface area (385 m2 g−1) from porous hypercrosslinked polymers (HCPs) through addition reaction and quaternization. The obtained HIPs were efficient in CO2 capture and conversion. Under the synergistic effect of high ionic content, large specific surface area, and plentiful micro/mesoporosity, the metal-free catalyst [HCP-CH2-Im][Cl]-1 exhibited quantitative selectivities, high catalytic yields, and good substrate compatibility for the conversion of CO2 into cyclic carbonates at atmospheric pressure (0.1 MPa) in a shorter reaction time in the absence of cocatalysts, solvents, and additives. High catalytic yields (styrene oxide, 120 °C, 8 h, 94% yield; 100 °C, 20 h, 93% yield) can be achieved by appropriately extending the reaction times at low temperature, and the reaction times are shorter than other porous materials under the same conditions. This work provides a new strategy for synthesizing an efficient metal-free heterogeneous catalyst with high ionic content and a large specific surface area from HCPs for the conversion of CO2 into cyclic carbonates. It also demonstrates that the ionic content and specific surface area must be coordinated to obtain high catalytic activity for CO2 cycloaddition reaction.

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“…Several efforts have focused on immobilizing bifunctional homogeneous catalyst analogues on heterogeneous supports to meet the above requirements. [154][155][156][157][158] The bifunctional catalysts contain both electrophilic (Lewis acid) and nucleophilic (Lewis base) functions, thereby avoiding the use of a co-catalyst. Such catalysts can be prepared by (i) anchoring organometallic complexes on heterogeneous supports, [155,156] (ii) encapsulating these complexes within large-pore zeolites, [157] and (iii) tailoring the ligands of metal-organic frameworks (MOFs).…”

Section: Cyclic Carbonates and Polycarbonatesmentioning

confidence: 99%

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input

et al. 2020

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Decarbonizing the chemical industry will eventually entail using CO 2 as a feedstock for chemical synthesis. However, many chemical syntheses involve CO 2 reduction using inputs such as renewable hydrogen. In this review, chemical processes are discussed that use CO 2 as an oxidant for upgrading hydrocarbon feedstocks. The captured CO 2 is inherently reduced by the hydrocarbon co-reactants without consuming molecular hydrogen or renewable electricity. This CO 2 utilization approach can be potentially applied to synthesize eight emission-intensive molecules, including olefins and epoxides. Catalytic systems and reactor concepts are discussed that can overcome practical challenges, such as thermodynamic limitations, overoxidation, coking, and heat management. Under the best-case scenario, these hydrogen-free CO 2 reduction processes have a combined CO 2 abatement potential of approximately 1 gigatons per year and avoid the consumption of 1.24 PWh renewable electricity, based on current market demand and supply.

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CO2 adsorption and conversion into cyclic carbonates over a porous ZnBr2-grafted N-heterocyclic carbene-based aromatic polymer

Cited by 136 publications

References 58 publications

Ionization of a covalent organic framework for catalyzing the cycloaddition reaction between epoxides and carbon dioxide

Ionization of a covalent organic framework for catalyzing the cycloaddition reaction between epoxides and carbon dioxide

Hypercrosslinked Ionic Polymers with High Ionic Content for Efficient Conversion of Carbon Dioxide into Cyclic Carbonates

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input

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CO2 adsorption and conversion into cyclic carbonates over a porous ZnBr2-grafted N-heterocyclic carbene-based aromatic polymer

Cited by 136 publications

References 58 publications

Ionization of a covalent organic framework for catalyzing the cycloaddition reaction between epoxides and carbon dioxide

Ionization of a covalent organic framework for catalyzing the cycloaddition reaction between epoxides and carbon dioxide

Hypercrosslinked Ionic Polymers with High Ionic Content for Efficient Conversion of Carbon Dioxide into Cyclic Carbonates

Synthesizing High‐Volume Chemicals from CO2 without Direct H2 Input

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Product

Resources

About

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input