Sorção De Co2 Utilizando Líquido Iônico Aditivado Com Extensores De Área Superficial

Souza, André Luiz Anton de; Vieira, Michele O.; Polesso, Bárbara B.; Cobalchini, Fabiana W.; Bernard, Franciele L.; Vecchia, Felipe Dalla; Einloft, Sandra

doi:10.21577/0100-4042.20170227

Cited by 3 publications

(2 citation statements)

References 23 publications

(23 reference statements)

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“…Greenhouse gas (GHG) concentration in the atmosphere is increasing due to anthropogenic source emissions. CO 2 is a greenhouse gas with important environmental impact [1,2]. Approximately 116 million tons of CO 2 are used annually for value-added products production, 94% of which are used only for urea production [3].…”

Section: Introductionmentioning

confidence: 99%

Chemical fixation of CO2: the influence of linear amphiphilic anions on surface active ionic liquids (SAILs) as catalysts for synthesis of cyclic carbonates under solvent-free conditions

Vieira

Monteiro

Neto

et al. 2019

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Carbon dioxide (CO 2 ) conversion is an efficient option to mitigate environmental impacts caused by CO 2 high concentration in the atmosphere. In this work are described catalytic activities of surface active ionic liquids (SAILs) composed of well-known cations 1-butyl-3-methylimidazolium ([bmim + ]) and tetra-n-butylammonium ([TBA + ]) and long alkyl chain anions: lauryl sulfate ([) and lauroyl sarcosinate ([C 12 SAR − ]) for cyclic carbonate synthesis. Results evidenced that [TBA + ] is more active as a catalyst due to its higher molecular volume increasing the cationanion distance and weakening the electrostatic interaction resulting in a more electrophilic cation. The [TBA][C 12 BSO 3 ] SAIL presented better catalytic activity for styrene carbonate (SC) synthesis, reaching 81.4% of conversion and 87.0% of selectivity as well as the high recycle capacity and possible application as catalyst for the syntheses of different cyclic carbonates: glycidyl isopropyl ether carbonate (GC) and epichlorohydrin carbonate (EC).

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Section: Introductionmentioning

confidence: 99%

Chemical fixation of CO2: the influence of linear amphiphilic anions on surface active ionic liquids (SAILs) as catalysts for synthesis of cyclic carbonates under solvent-free conditions

Vieira

Monteiro

Neto

et al. 2019

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“…As a result, from the industrial revolution, the industrialization and the development of society promoted a significant increase in the concentration of carbon dioxide (CO2). CO2 is one of the most important greenhouse gases (GHG) in terms of quantities emitted [1,2]. Approximately 116 million tons of CO2 are used annually, with 94% being used only for urea production.…”

Section: Introductionmentioning

confidence: 99%

CO<sub>2</sub> Chemical Conversion Using Catalytics Systems Based on Titanate Nanotubes

Monteiro

Vieira

Scheid

et al. 2019

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CO2 is the most important greenhouse gas in terms of emitted quantities and its emission has increased significantly due to the action of anthropogenic sources. Among the alternatives for mitigation of this gas is the direct synthesis of propylene carbonate (PC), which requires efficient and selective catalysts. In this scenario the titanate nanotubes (TNT) are promising catalysts because they can be modified to become selective for the PC synthesis. The present work has the objective to develop titanate nanotubes with different metals (Na, Sn and Zn) as well as protonated titanate nanotubes (HTNT) and to test their efficiency in the direct synthesis of PC. The synthesized nanostructures were characterized by TEM, EDS, XRD and N2 adsorption-desorption. The results showed that the synthesized TNT have a specific surface area of 155, 232, 56 and 140 m2/g (NaTNT, HTNT, SnTNT and ZnTNT, respectively). Besides, the ion exchange of [Na+] by [Sn+2] and [Zn+2] decreased the crystallinity of nanostructure. On the catalytic tests, the system NaTNT/ZnBr2 showed the best results with a yield of 61% and a selectivity of 81% in PC. The catalytic system SnTNT/DMF and ZnTNT/DMF are promising to this reaction showing interesting yields and catalytic activity (59 and 53%; 295 and 265 mmol/g) for PC synthesis.

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Hybrid Ionic Liquid–Silica Xerogels Applied in CO2 Capture

et al. 2019

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The imidazolium-based ionic liquids (ILs) are solvents known for selectively solubilizing CO2 from a gas CH4/CO2 mixture, hence we have produced new hybrid adsorbents by immobilizing two ILs on xerogel silica to obtain a solid–gas system that benefits the ILs’ properties and can be industrially applied in CO2 capture. In this work, the ILs (MeO)3Sipmim.Cl and (MeO)3Sipmim.Tf2N were used at different loadings via the sol–gel process employing a based 1-methyl-3-(3-trimethoxysylilpropyl) imidazolium IL associated to the anion Cl− or Tf2N− as a reactant in the synthesis of silica xerogel. The CO2 adsorption measurements were conducted through pressure and temperature gravimetric analysis (PTGA) using a microbalance. SEM microscopies images have shown that there is an IL limit concentration that can be immobilized (ca. 20%) and that the xerogel particles have a spherical shape with an average size of 20 µm. The adsorbent with 20% IL (MeO)3Sipmim.Cl, SILCLX20, shows greater capacity to absorb CO2, reaching a value of 0.35 g CO2 / g adsorbent at 0.1 MPa (298 K). Surprisingly, the result for xerogel with IL (MeO)3Sipmim.Tf2N shows poor performance, with only 0.05 g CO2 / g absorbed, even having a hydrophobic character which would benefit their interaction with CO2. However, this hydrophobicity could interfere negatively in the xerogel synthesis process. The immobilization of ionic liquids in silica xerogel is an advantageous technique that reduces costs in the use of ILs as they can be used in smaller quantities and can be recycled after CO2 desorption.

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Sorção De Co2 Utilizando Líquido Iônico Aditivado Com Extensores De Área Superficial

Cited by 3 publications

References 23 publications

Chemical fixation of CO2: the influence of linear amphiphilic anions on surface active ionic liquids (SAILs) as catalysts for synthesis of cyclic carbonates under solvent-free conditions

Chemical fixation of CO2: the influence of linear amphiphilic anions on surface active ionic liquids (SAILs) as catalysts for synthesis of cyclic carbonates under solvent-free conditions

CO<sub>2</sub> Chemical Conversion Using Catalytics Systems Based on Titanate Nanotubes

Hybrid Ionic Liquid–Silica Xerogels Applied in CO2 Capture

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