Polyurethane‐based poly (ionic liquid)s for CO<sub>2</sub> removal from natural gas

Bernard, Franciele L.; Santos, Leonardo Moreira dos; Schwab, Marina Barbieri; Polesso, Bárbara B.; Nascimento, Jaílton Ferreira do; Einloft, Sandra

doi:10.1002/app.47536

Cited by 19 publications

(22 citation statements)

References 65 publications

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“…For SIL and SIL-Cl samples an increase in temperature resulted in a decrease on CO 2 sorption capacity, indicating typical behavior of a physical sorbent. Similar behavior was described in litertura (Bernard et al., 2019; Ye et al., 2012). For SIL-OAc the temperature increase improves the interaction between [OAc] - and CO 2 molecules increasing CO 2 sorption capacity.…”

Section: Resultssupporting

confidence: 81%

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Polesso

Bernard

Ferrari

et al. 2019

Heliyon

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Physical immobilization of ionic liquids (ILs) in solid materials appears as an interesting strategy for the development of new sorbents for CO 2 separation from natural gas. In this work the effect of physical immobilization of two ionic liquids with different anions (bmim[Cl] and bmim[OAc]) on two mesoporous supports (commercial silica SBA-15 and silica extracted from rice husk) was evaluated for CO 2 separation from natural gas by experimental determination of CO 2 sorption, CO 2 /CH 4 selectivity and sorption kinetics. Results showed that the pure supports present the greatest CO 2 sorption capacity when compared to immobilized ILs. However, CO 2 removal efficiency improves considerably in the CO 2 /CH 4 mixture when ILs are immobilized in these supports. The best selectivity results were obtained for supports immobilized with the IL bmim[Cl] and values increased for SIL-Cl by 37% and SBA-Cl 51% when compared with their respective supports. The contribution of SIL-Cl (3.03 ± 0.12) to separation performance (CO 2 /CH 4 ) is similar to SBA-Cl (3.29 ± 0.39). ILs supported also presented fast sorption kinetics when compared to pure ILs thus being an interesting alternative in the search for highly efficient and low-cost separation processes.

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Section: Resultssupporting

confidence: 81%

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Polesso

Bernard

Ferrari

et al. 2019

Heliyon

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“…The incorporation of sulphate and sulphonate anions produces highly resilient PILs through the presence of irreversibly cross-linked ion pairs [ 211 , 212 , 213 , 214 ]. Similar stability can be achieved by the incorporation of hydroxide, carbonate, phosphate, and phosphonate anions [ 121 , 179 ]. These anions provide thin films that exhibit not only reversible CO 2 solubility, but also that resist the hydrolysis of anionic groups.…”

Section: Polymeric Ionic Liquids (Pils)mentioning

confidence: 96%

“…A broad variety of PU-based PILs has been prepared to investigate the influence of different ionic diols as cations and counterions on the CO 2 selectivity [ 178 , 179 ]. Further research on their application in CO 2 /CH 4 separation demonstrated the possibility of PU-based PILs to overcome the CO 2 sorption capacity in comparison to linear PILs [ 121 ]. Furthermore, several hybrid urethane-imide PILs showed enhanced CO 2 sorption capacity in the CO 2 physisorption experiments [ 180 ].…”

Section: Polymeric Ionic Liquids (Pils)mentioning

confidence: 99%

A Review on Ionic Liquid Gas Separation Membranes

et al. 2021

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Ionic liquids have attracted the attention of the industry and research community as versatile solvents with unique properties, such as ionic conductivity, low volatility, high solubility of gases and vapors, thermal stability, and the possibility to combine anions and cations to yield an almost endless list of different structures. These features open perspectives for numerous applications, such as the reaction medium for chemical synthesis, electrolytes for batteries, solvent for gas sorption processes, and also membranes for gas separation. In the search for better-performing membrane materials and membranes for gas and vapor separation, ionic liquids have been investigated extensively in the last decade and a half. This review gives a complete overview of the main developments in the field of ionic liquid membranes since their first introduction. It covers all different materials, membrane types, their preparation, pure and mixed gas transport properties, and examples of potential gas separation applications. Special systems will also be discussed, including facilitated transport membranes and mixed matrix membranes. The main strengths and weaknesses of the different membrane types will be discussed, subdividing them into supported ionic liquid membranes (SILMs), poly(ionic liquids) or polymerized ionic liquids (PILs), polymer/ionic liquid blends (physically or chemically cross-linked ‘ion-gels’), and PIL/IL blends. Since membrane processes are advancing as an energy-efficient alternative to traditional separation processes, having shown promising results for complex new separation challenges like carbon capture as well, they may be the key to developing a more sustainable future society. In this light, this review presents the state-of-the-art of ionic liquid membranes, to analyze their potential in the gas separation processes of the future.

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“…Results provide evidence that the addition of CPIL-TBP can increase the selectivity of PU for CO 2 over CH 4 . PU/CPIL-TBP 20% composite presented higher CO 2 /CH 4 selectivity as compared with polyurethane-based poly(ionic liquid) s (PILPC-TBP: CO 2 /CH 4 selectivity of ∼2.22 at 303.15 K and 2 MPa) 49 and PU foam/ILs composite (PUF BF4 40: CO 2 /CH 4 selectivity of 1.42 at 3 MPa) 29 .…”

Section: Tensile Properties and Young Moduli Are Presented Inmentioning

confidence: 96%

Polyurethane/poly (Ionic Liquids) Cellulosic Composites and their Evaluation for Separation of CO2 from Natural Gas

et al. 2019

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The development of both versatile and inexpensive sorbents for CO 2 /CH 4 separation has become one of the greatest challenges to the environment and natural gas processing. This study reports the preparation and characterization of polyurethane (PU)/ cellulose based poly(ionic liquid)(CPIL) composites for CO 2 /CH 4 separation. PU matrix was reinforced with CPIL in the range of 10-30 wt%. Several characterization techniques (TGA, DSC, DMTA and FESEM) were used to study the physical properties of composites when the PU matrix is reinforced with cellulose based poly (ionic liquids) (CPIL) up to 30%. CO 2 sorption, reusability and CO 2 /CH 4 selectivity were assessed by pressure-decay technique. Results showed that CPIL addition in PU matrix promoted the increase in both thermal stability and mechanical properties when compared to PU. The best result for CO 2 sorption (35.0 mgCO 2 /g) was obtained for PU/CPIL-TBP 10% which presented a higher sorption value when compared to PU (24.1 mgCO 2 /g) and PU/CELLULOSE 10% (26.8 mgCO 2 /g). PU/ CPIL-TBP 20% demonstrated higher CO 2 /CH 4 selectivity. PU/CPIL composites appear as promissory materials for CO 2 capture. These compounds combine the benefits of ionic liquids (ILs) (high ionic conductivity, chemical and thermal stability) and cellulose (thermal stability) with PU properties (mechanical stability, processing and tunable macromolecular design).

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Polyurethane‐based poly (ionic liquid)s for CO₂ removal from natural gas

Cited by 19 publications

References 65 publications

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

A Review on Ionic Liquid Gas Separation Membranes

Polyurethane/poly (Ionic Liquids) Cellulosic Composites and their Evaluation for Separation of CO2 from Natural Gas

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Polyurethane‐based poly (ionic liquid)s for CO2 removal from natural gas

Cited by 19 publications

References 65 publications

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

A Review on Ionic Liquid Gas Separation Membranes

Polyurethane/poly (Ionic Liquids) Cellulosic Composites and their Evaluation for Separation of CO2 from Natural Gas

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Product

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Polyurethane‐based poly (ionic liquid)s for CO₂ removal from natural gas