Solubility of light gases in poly(n-butyl methacrylate) at elevated pressures

Nadakatti, Suresh; Kim, J.H.; Stern, S. A.

doi:10.1016/0376-7388(95)00182-4

Cited by 13 publications

(15 citation statements)

References 27 publications

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“…In summary, a temperature rise increases diffusivity (D) and permeability (P) and reduces solubility (S) for both H 2 and CO 2 . These results are in agreement with previous studies, such as the work of Naddakati et al [25].…”

Section: Time Lag Resultssupporting

confidence: 83%

Characterization of a Polymeric Membrane for the Separation of Hydrogen in a Mixture with CO2

Malagón-Romero¹,

Ladino²,

Ortiz³

et al. 2016

TOEFJ

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Abstract:Hydrogen is expected to play an important role as a clean, reliable and renewable energy source. A key challenge is the production of hydrogen in an economically and environmentally sustainable way on an industrial scale. One promising method of hydrogen production is via biological processes using agricultural resources, where the hydrogen is found to be mixed with other gases, such as carbon dioxide. Thus, to separate hydrogen from the mixture, it is challenging to implement and evaluate a simple, low cost, reliable and efficient separation process. So, the aim of this work was to develop a polymeric membrane for hydrogen separation. The developed membranes were made of polysulfone via phase inversion by a controlled evaporation method with 5 wt % and 10 wt % of polysulfone resulting in thicknesses of 132 and 239 micrometers, respectively. Membrane characterization was performed using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), atomic force microscopy (AFM), and ASTM D882 tensile test. Performance was characterized using a 2 3 factorial experiment using the time lag method, comparing the results with those from gas chromatography (GC). As a result, developed membranes exhibited dense microstructures, low values of RMS roughness, and glass transition temperatures of approximately 191.75 °C and 190.43 °C for the 5 wt % and 10 wt % membranes, respectively. Performance results for the given membranes showed a hydrogen selectivity of 8.20 for an evaluated gas mixture 54% hydrogen and 46% carbon dioxide. According to selectivity achieved, H 2 separation from carbon dioxide is feasible with possibilities of scalability. These results are important for consolidating hydrogen production from biological processes.

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Section: Time Lag Resultssupporting

confidence: 83%

Characterization of a Polymeric Membrane for the Separation of Hydrogen in a Mixture with CO2

Malagón-Romero¹,

Ladino²,

Ortiz³

et al. 2016

TOEFJ

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“…However, the dual-site-mode sorption model, which is described by the sum of the contributions from Henry ( C H ) and Langmuir sorption ( C L ), has been well established for many polymeric materials (eq ). , C = C H + C L = k H P + b P C L * 1 + b P where k H is the Henry’s solubility coefficient, C L * is the Langmuir saturation constant, b is the Langmuir affinity constant, and P is the applied gas pressure. Similarly, in this study, we speculate that CO 2 adsorbed in 1 -MSM can be distributed in two distinct populations as follows: (1) Henry-type sorption (randomly mixing with weak interactions) and (2) Langmuir-type sorption (sorption in the specific domains with strong interactions).…”

Section: Resultsmentioning

confidence: 99%

Self-Assembling Imidazolium-Based Ionic Liquid in Rigid Nanopores Induces Anomalous CO₂ Adsorption at Low Pressure

Tanaka¹,

Kida²,

Fujimoto³

et al. 2011

Langmuir

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An alkylimidazolium-based long-chain ionic liquid (LCIL) was immobilized in silica nanopores via a supramolecular assembly approach. To discuss the characteristic features of LCIL in a confined nanospace, except for the characteristics of the host materials, we have prepared the silica host with monodisperse morphology and a nanostructured system to immobilize LCIL. The nanostructure is composed of three distinct regions: the silica framework, the hydrophobic interior of the alkyl chains, and the organic-inorganic ionic interface. Anomalous CO(2) adsorption sites were found to be well-ordered locations on the ionic interface fabricated by the π-π-stacked imidazolium heads containing inorganic anions and polar silica surfaces.

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“…There has been much work on measuring gas sorption in various polymers for a variety of alkanes. [35][36][37][38][39] However, given the large number of samples and fluids used in this study, it is desirable to avoid a separate measurement to determine the composition for each of the measured transitions. It has been proposed that for a homologous set of solvents, such as alkanes, solvent quality is determined almost exclusively by density.…”

Section: Resultsmentioning

confidence: 99%

“…It is expected that for methane the total sorption in any of the reported cases will be less than 2 wt % from sorption data in polystyrene and poly(n-butyl methacrylate). 37 The difference in the behavior between the light (C 1-4) alkanes and tetradecane is due to the large difference in compressibility.…”

Section: Effect Of Light Alkane Sorption On the Ldot Of P(s-b-nbma)mentioning

confidence: 99%

Phase Behavior of Diblock Copolymers Dilated with Light Alkanes: Influence of Solvent Compressibility on Upper and Lower Ordering Transitions

Vogt

Watkins

2002

Macromolecules

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The phase behaviors of polystyrene-block-poly(n-butyl methacrylate) (P(S-b-nBMA)) and polystyrene-block-polyisoprene (P(S-b-I)) copolymers were studied in the presence of methane, ethane, propane, butane, and tetradecane. Sorption of the light alkanes induces phase segregation in P(S-b-nBMA), depressing the lower disorder-to-order transition (LDOT). The chain length of the solvent dictates the severity of the depression. At equivalent volume fractions, methane induces the most substantial shift of the LDOT, and as the length of the alkane chain is increased, the degree of the depression is diminished. In contrast to the influence of expanded solvents, dilution of the P(S-b-nBMA) melt with tetradecane slightly increases the miscibility of the segments. In all P(S-b-I)/alkane systems studied, solvent sorption increases the region of miscibility and depresses the upper order-to-disorder transition (UODT). This effect is independent of alkane chain length and depends only on the volume fraction of alkane sorbed into the copolymer. The difference in behaviors between the copolymers is due to the nature of microphase separation. In the P(S-b-I) system, the UODT is enthalpically driven and solvent sorption screens unfavorable contacts. In the P(S-b-nBMA) system, the LDOT arises due to disparities in compressibility between the segments that are exacerbated by the selective sorption of compressible solvents.

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Solubility of light gases in poly(n-butyl methacrylate) at elevated pressures

Cited by 13 publications

References 27 publications

Characterization of a Polymeric Membrane for the Separation of Hydrogen in a Mixture with CO2

Characterization of a Polymeric Membrane for the Separation of Hydrogen in a Mixture with CO2

Self-Assembling Imidazolium-Based Ionic Liquid in Rigid Nanopores Induces Anomalous CO₂ Adsorption at Low Pressure

Phase Behavior of Diblock Copolymers Dilated with Light Alkanes: Influence of Solvent Compressibility on Upper and Lower Ordering Transitions

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Solubility of light gases in poly(n-butyl methacrylate) at elevated pressures

Cited by 13 publications

References 27 publications

Characterization of a Polymeric Membrane for the Separation of Hydrogen in a Mixture with CO2

Characterization of a Polymeric Membrane for the Separation of Hydrogen in a Mixture with CO2

Self-Assembling Imidazolium-Based Ionic Liquid in Rigid Nanopores Induces Anomalous CO2 Adsorption at Low Pressure

Phase Behavior of Diblock Copolymers Dilated with Light Alkanes: Influence of Solvent Compressibility on Upper and Lower Ordering Transitions

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Product

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Self-Assembling Imidazolium-Based Ionic Liquid in Rigid Nanopores Induces Anomalous CO₂ Adsorption at Low Pressure