Using Ionic Liquids to Improve CO2 Capture

Molecules, Journal Year: 2024, Volume and Issue: 29(22), P. 5388 - 5388

Published: Nov. 15, 2024

Most of our energy consumption proceeds from the use fossil fuels and production natural gas. However, presence impurities in this gas, like CO2, makes treatment necessary to avoid further concerns, such as greenhouse gas emissions, corrosion industrial equipment, etc.; thus, development CO2 capture storage procedures is utmost importance order decrease mitigate its contribution global warming. Among processes available, three separation technologies are being used achieve goal: absorption, adsorption membranes. To overcome some limitations these methodologies, joint with ionic liquids gaining interest. The present work reviewed most recent developments (for 2024) using coupled absorption-, adsorption- or membrane-based processes.

Language: Английский

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Ionic Polymers with Phenolic Hydroxyl Groups as Hydrogen Bond Donors Toward Enhanced Catalytic Performance for CO₂ Conversion

ChemistrySelect, Journal Year: 2024, Volume and Issue: 9(30)

Published: Aug. 9, 2024

Abstract In this study, imidazolium‐based multifunctional ionic polymer ( IP 1 – 3 ) series, co‐incorporated with phenolic hydroxyl groups as hydrogen bond donors (HBDs) and Cl − nucleophiles, are synthesized by a facile quaternization method. The physicochemical characterizations of these IPs systematically examined using FTIR, XPS, BET, TGA, CO 2 ‐TPD, SEM elemental mapping TEM methods. Their catalytic activities evaluated toward the conversion carbon dioxide (CO epoxides into cyclic carbonates under solvent‐ additive‐free environments. Apart from synergy effect between HBDs , it is found that types spacer linking two imidazole units in diimidazole precursors L also play an important role activity. And pyridine Lewis base site, exhibits best performance solvent‐free mild conditions i. e., atmospheric pressure 80 °C, 5 h. Notably, catalyst demonstrates good substrate applicability. Furthermore, exhibited reusability, stability, can be recycled for ten successive runs stable potential This study provides alternative route to construct efficient activity fixation mild‐conditions.

Language: Английский

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Rh(I) Catalyzed Polymerization of Propargylated Monosaccharides to Electrospinable Helically Chiral Linear Polyacetylenes and Sorption‐Active Porous Polyacetylene Networks

Journal of Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 8, 2024

ABSTRACT We report the Rh(I)‐catalyzed chain‐growth polymerizations of propargylated monosaccharides to form π‐conjugated polyacetylene‐type products with monosaccharide substituents attached polyacetylene backbone via short methylene spacers. The homopolymerization provides helically chiral linear polyacetylenes M w ~ 20,000 soluble in either water (monosaccharide free OH groups) or organic solvents (acetylated substituents). methodology is established for transformation prepared polymers into fibers (average diameter ~2.7 μm) taking advantage electrospinning technique. Copolymerization 1,3,5‐triethynylbenzene cross‐linker hyper‐cross‐linked networks units content up 46 wt.%, permanent micro/mesoporosity and S BET area 482 m 2 g −1 . serve as centers active reversible isothermal adsorption vapor from air. achieved H O capture capacity 200 mg (298 K, RH = 90%) shows promising (co)building blocks construction porous materials effective harvesting

Language: Английский

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Achieving carbon neutrality through conversion of CO2 to cyclic carbonates using bifunctional benzimidazolium-based pyridine hypercrosslinked polymers

Applied Surface Science, Journal Year: 2024, Volume and Issue: unknown, P. 162164 - 162164

Published: Dec. 1, 2024

Language: Английский

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A New Aluminum Porphyrin-Based Porous Hyper-Cross-Linked Polymer Modified by Imidazolium Salts for Cooperative Conversion of CO₂ into Cyclic Carbonates under Mild Conditions

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 22, 2024

Metalloporphyrin-based porous organic polymers that behave as advanced biomimetic nanoreactors have drawn continuous attention for heterogeneous CO2 cycloaddition conversion in the past decades. However, use of homogeneous onium salts, usually acting nucleophilic cocatalysts, may increase cost product purification and cause additional environmental problems. In this contribution, a new aluminum porphyrin-based hyper-cross-linked polymer modified by imidazolium salts (denoted Im@Al-HCP) has been successfully constructed first time. The two-step process hyper-cross-linking reaction combined with postsynthetic modification endows catalyst large surface area (about 213 m2·g–1), good adsorption capacity (up to 1.45 mmol·g–1), highly dispersed cooperative active sites. Accordingly, bifunctional Im@Al-HCP exhibits an outstanding catalytic activity, recyclability, broad substrate generality without cocatalysts solvents under mild conditions. particular, high turnover frequency (TOF) value up 5000 h–1 can be acquired, which far exceeds most reported catalysts identical addition, as-made recycled at least six times obvious loss activity. This work not only bring some inspirations construction multifunctional but also provides great potential industrial applications cycloadditions.

Language: Английский

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Synergistic Interaction-regulated selective carbon dioxide adsorption of amino-functionalized porous organic polymers

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: unknown, P. 131257 - 131257

Published: Dec. 1, 2024

Language: Английский

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