Separation of CO2 from the CO2/N2 mixed gas through ionic liquid membranes at the high feed concentration

Jindaratsamee, Pinyarat; Ito, Akira; Komuro, Shogo; Shimoyama, Yusuke

doi:10.1016/j.memsci.2012.07.012

Cited by 45 publications

(17 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…x CO2 further increased above 20%. The x CO2dependence (or CO 2 partial pressure-dependence) of P m,CO2 shown in Figure 6 generally agrees with the relationship between CO 2 permeability and partial pressure reported in literature, which is typical for facilitated gas transport in IL membrane [18,19]. The decreases of P m,CO2 and CO 2 /N 2 have been attributed to the saturation of the anionic carriers (F ) for CO 2 at high CO 2 partial pressures that results in smaller carrier potential gradient to reduce the CO 2 permeation through the IL membrane [20]; on the contrary, permeance of the physically absorbed N 2 can be enhanced due to diffusivity enhancement by the reduced IL viscosity under high CO 2 concentration.…”

Section: Separation Of Co 2 /N 2 Mixturessupporting

confidence: 90%

Colloidal Silicalite Coating for Improving Ionic Liquid Membrane Loading on Macroporous Ceramic Substrate for Gas Separation

Cao

Yang

Sun

et al. 2016

J. Memb. Separ. Tech.

View full text Add to dashboard Cite

A thin layer of colloidal silicalite was coated on a macroporous alumina substrate to improve the effectiveness in loading and supporting ionic liquid (IL) membrane on macroporous ceramic substrate. The [bmim][BF4] IL and CO2 gas separation were used as the model system in this research. The colloidal silicalite top layer enabled the formation of a pinhole-free IL membrane with significantly reduced load of IL as compared to the bare alumina substrate because the former had a smaller and more uniform inter-particle pore size than the latter. The supported IL membrane was extensively studied for CO2 separation in conditions relevant to coal combustion flue gases. The silicalite-supported IL membrane achieved a CO2/N2 permselectivity of ~24 with CO2 permeance of ~1.0 10-8 mol/m 2 •s•Pa in dry conditions at 26˚C and reached a CO2/N2 separation factor of ~18 with CO2 permeance of ~1.56 10-8 mol/m 2 •s•Pa for a feed mixture containing ~11% CO2 and ~9% water vapor at 50 o C. This supported IL membrane exhibited excellent stability under a 5bar transmembrane pressure at 103˚C and chemical resistance to H2O, SO2, and air (O2). Results of this study also indicated that, in order to fully realize the advantages of using the colloidal silicalite support for IL membranes, it is necessary to develop macroporous ceramic supports with optimized pore size distribution so that the IL film can be retained in the micron-thin silicalite layer without penetrating into the base substrate.

show abstract

Section: Separation Of Co 2 /N 2 Mixturessupporting

confidence: 90%

Colloidal Silicalite Coating for Improving Ionic Liquid Membrane Loading on Macroporous Ceramic Substrate for Gas Separation

Cao

Yang

Sun

et al. 2016

J. Memb. Separ. Tech.

View full text Add to dashboard Cite

show abstract

“…Many reports using RTILs in the applications of gas separation membranes focused on using them as the liquid phase of supported ionic liquid membranes (SILM) because of the low volatility and high thermal stability of RTIL. Some SILMs showed good CO 2 /N 2 selectivities ranging from 20 to 50 with CO 2 permeabilities from 744 to 1200 Barrer . While some SILMs have attractive potential transport properties, there are challenges of commercialization including weak mechanical stability, loss of RTIL at elevated temperatures and pressures and degradation of transport properties.…”

Section: Introductionmentioning

confidence: 99%

Gas transport properties in (6FDA‐RTIL)‐(6FDA‐MDA) block copolyimides

Zhang

Cao

Coleman

et al. 2015

J of Applied Polymer Sci

View full text Add to dashboard Cite

This article reports synthesis and structure property studies of block copolyimides synthesized using diamino room temperature ionic liquids (RTIL) as diamine monomers. Specifically, polyimide oligomers of different lengths were synthesized using 2,2bis (3,4-carboxylphenyl) hexafluoropropane dianhydride (6FDA) and diamino RTIL (1,3-di(3-aminopropyl) imidazolium bis[(trifluoromethyl) sulfonyl] imide). These oligomers were copolymerized with 6FDA and m-phenylenediamine (MDA) using in situ polymerization to form (6FDA-RTIL)-(6FDA-MDA) block copolyimides. The impact of the length and relative concentration of 6FDA-RTIL oligomer in the copolymer on the resulting thermal, physical, and gas transport properties was monitored. As the concentration of the 6FDA-RTIL segments increased, the backbone of the block copolyimides became more flexible resulting in a decrease in the glass transition temperature (T g ) and an increase in the density. The permeabilities of the RTIL containing copolyimides were consistently lower than those of the base polyimide, 6FDA-MDA, with some increase in selectivities. Interestingly, the permeabilities of films produced with the low molecular weight oligomers were very different than those produced with same composition of the high molecular weight oligomers. This may be indicative of very different morphologies within these copolyimides.

show abstract

“…17,18 Consequently, several studies on the permeation properties of gases through SILM systems have explored the effect of the IL structure. Relating to the influence of the cation, a number of groups have investigated the gas permeation properties of different families of ILs (imidazolium, [19][20][21][22][23][24][25][26][27][28][29][30] phosphonium, 31,32 sulphonium, 32 pyridinium, 33 and ammonium 34 ) and improved results were obtained for imidazolium-based SILMs in terms of permeability and selectivity. Other studies, also focused on imidazolium ILs, explored different structural variations of the cation in order to enhance CO 2 solubility and selectivity.…”

Section: Introductionmentioning

confidence: 99%

CO2 separation applying ionic liquid mixtures: the effect of mixing different anions on gas permeation through supported ionic liquid membranes

et al. 2013

View full text Add to dashboard Cite

In order to increase flexibility in tailoring the permeability and selectivity of supported ionic liquid membranes (SILMs) for flue gas separation and natural gas purification, this work explores the use of ionic liquid mixtures. For that purpose, gas permeation properties of CO 2 , CH 4 were measured at 293 K using a time lag apparatus. In addition to gas permeation results, the thermophysical properties of those mixtures, namely viscosity and density, were also determined so that trends between the two types of properties could be evaluated. The results show that mixing [Ac] or

show abstract

Separation of CO2 from the CO2/N2 mixed gas through ionic liquid membranes at the high feed concentration

Cited by 45 publications

References 19 publications

Colloidal Silicalite Coating for Improving Ionic Liquid Membrane Loading on Macroporous Ceramic Substrate for Gas Separation

Colloidal Silicalite Coating for Improving Ionic Liquid Membrane Loading on Macroporous Ceramic Substrate for Gas Separation

Gas transport properties in (6FDA‐RTIL)‐(6FDA‐MDA) block copolyimides

CO2 separation applying ionic liquid mixtures: the effect of mixing different anions on gas permeation through supported ionic liquid membranes

Contact Info

Product

Resources

About