Composite phenolic resin-based carbon molecular sieve membranes for gas separation

Teixeira, Madalena; Campo, M.C.; Tanaka, David A. Pacheco; Tanco, Margot A. Llosa; Magén, Cesar; Mendes, Adélio

doi:10.1016/j.carbon.2011.06.012

Cited by 77 publications

(62 citation statements)

References 40 publications

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“…Ceramic substrates have been reported to provide ideal surfaces for the coating of phenolic resins, particularly porous alumina tubes which allow this technology to be scaled up. This has been shown by Pacheco Tanaka and co-workers [30][31][32][33] by coating novolac and resol phenolic resins, or by mixing alpha-alumina with novolac. A very recent development involves the preparation of carbon-alumina mixed matrix membranes, where the phenolic resin was incorporated into the porous structure of an alumina substrate by a vacuum impregnation, showing that the vacuum time played an important role in the structural formation of the mixed matrix membranes [22].…”

Section: Introductionmentioning

confidence: 80%

Vacuum-assisted tailoring of pore structures of phenolic resin derived carbon membranes

Jalil

Wang²,

Yacou

et al. 2017

Journal of Membrane Science

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This work shows the preparation and separation performance assessment of carbon membranes derived from phenolic resin by a vacuum-assisted method and carbonisation in an inert atmosphere.The vacuum time played an important role in tailoring the structure of the membranes. For instance, pore volumes and surface areas increased from 0.81 and 834 to 2.2 cm 3 g -1 and 1910 m 2 g -1 , respectively, as the vacuum time exposure increased from 0 to 1200 s. The significant structural changes correlated very well with water permeation, as fluxes increased by 91% as the vacuum time increased from 0 to 1200s, reaching up to 169 kg m -2 h -1 at 5 bar. Molecular weight cut-off tests showed no rejection for the smaller glucose and sucrose molecules, though this increased to ~ 80% and full rejection for 36kD and 400kD polyvinyl pyrrolidine. Interestingly, FTIR spectra showed that the peaks of C-H stretching vibration (2800-3200 cm -1 ) and C-O stretching (1030 cm -1 ) became more pronounced as a function of increasing vacuum time, strongly suggesting that the use of vacuum further assisted in the polycondensation of phenolic oligomers. Based on these outcomes, a cluster to cluster model is proposed, whereby vacuum application promoted crosslinking reactions of the phenolic resin, creating microporous regions within the clusters, and mesoporous regions between the clusters. 2 Graphical AbstractKeywords: carbon membranes; vacuum-assisted method; water; molecular weight cut-off.

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Section: Introductionmentioning

confidence: 80%

Vacuum-assisted tailoring of pore structures of phenolic resin derived carbon membranes

Jalil

Wang²,

Yacou

et al. 2017

Journal of Membrane Science

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“…A shell-and-tube apparatus [17] equipped with a pressure controller (Horiba Stec, model UR-7340) and an STEC SF-2 film flow meter was used to measure the permeation of gases through the supported carbon membranes. The temperature was kept constant by using an oven having three independent heating zones.…”

Section: Permeation Experimentsmentioning

confidence: 99%

“…The c-CMSM exhibited ideal O2/N2 and C3H6/C3H8 permselectivities of 5 and 15, respectively. The effect of Ag was also evaluated and it was observed that the load of Ag enhanced the carbon membrane performance especially for C3H6/C3H8 separation, where the C3H6/C3H8 permselectivity increased from a maximum of 15 to 38 [17,18]; however, since resol resins contain reactive methylol groups it has been realized that the permeation characteristics depends on the batch of the resin used and in the time elapsed since the resin was fabricated. The preparation of CMSM on a-alumina supports by carbonization at 500 o C and 550 o C of a resorcinolformaldehyde resin loaded with boehmite has been studied [30], the authors conclude that the membrane carbonized at 550 o C has more ultramicropores and a narrower pore size distribution and that the permselectivity after activation surpasses the Robeson upper bound for O2/N2 > 11.5.…”

Section: Introductionmentioning

confidence: 99%

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Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part I: Preparation, characterization and gas permeation studies

Tanco

Tanaka

Rodrigues

et al. 2015

International Journal of Hydrogen Energy

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Supported composite alumina-carbon molecular sieve membranes (c-CMSM) were prepared from in house prepared novolac phenolic resin loaded with boehmite nanoparticles in a single dipping-drying-carbonization step. A porous a-alumina tube support was dipped into a N-methyl-2-pyrrolidone solution containing polymerized novolac resin loaded with boehmite, subsequently dried at 100 o C and carbonized at 500 o C under nitrogen environment. The structure, morphology and performance of the membranes were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), carbon dioxide adsorption and permeation of N2, O2, He, H2 and CO2. SEM showed carbon membranes with a thin and very uniform layer with a thickness of ca. 3 m CO2 adsorption isotherms indicated that the produced carbon membranes presented a micro-porous structure. The c-CMSM exhibited good gas separation properties. The permselectivity surpass the Robeson upper bound for polymeric membranes, especially regarding ideal permselectivities of pairs H2/N2 = 117, and He/O2 = 49. Aging effects were observed after membrane exposure to ambient air.However with a thermal treatment under nitrogen atmosphere the permeance of nitrogen increases.

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“…In addition, carbon templates such as triblock copolymers [22] and surfactant hexyltriethylammonium bromide (C6) [23] have been embedded and carbonised in silica films as molecular sieve structures for desalination and gas separation. Alumina nano wires and silver nanoparticles have been used to improve the performance of CMS membranes [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Fine ultra-micropore control using the intrinsic viscosity of precursors for high performance carbon molecular sieve membranes

Qin

Cao

Wen

et al. 2017

Separation and Purification Technology

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Please cite this article as: G. Qin, X. Cao, H. Wen, WeiWei, J.C. Diniz da Costa, Fine ultra-micropore control using the intrinsic viscosity of precursors for high performance carbon molecular sieve membranes, Separation and Purification Technology (2016), doi: http://dx.doi.org/10.1016/j.seppur. 2016.12.047 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Fine ultra-micropore control using the intrinsic viscosity of precursors for high performance carbon molecular sieve membranes AbstractHere we report the permeability and separation performance of self-standing carbon molecular sieve (CMS) membranes formed by pyrolysis of polyimide (PI) precursors derived from poly(amic acid) (PAA) with varying intrinsic viscosity. CMS resulted in ultra-microporous membranes showing a classical molecular sieving structure as gas permeation was high for smaller molecular gas (H 2 ), which then decreased sequentially as the molecular sizes increased in the order of CO 2 , O 2 and N 2 . An important relationship was found when the intrinsic viscosity of the PAA precursor decreased from 1.66 to 0.65 dl g -1 , the ideal gas selectivity jumped to higher values such as from 101.8 to 163.1 for H 2 /N 2 , from 21.5 to 34.6 for CO 2 /N 2 and from 6.7 to 10.7 for O 2 /N 2 while the permeability decreased such as from 1816 to 1487 Barrer for H 2 , from 383.4 to 314.8 Barrer for CO 2 , from 119.0 to 97.7 Barrer for O 2 , from 17.8 to 9.1 Barrer for N 2 . The low intrinsic viscosity conferred a superior pore size control of the CMS structure, with an average ultramicropore size around 3Å. The O 2 /N 2 and H 2 /N 2 ideal selectivity versus permeability results were all above the Robeson's upper bound line, thus demonstrating the effect of low intrinsic viscosity precursors in  Corresponding author. E-mail: qingt@buaa.edu.cn (Guotong Qin); Tel +86-10 82338556 the synthesis of high performance CMS membranes.

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Composite phenolic resin-based carbon molecular sieve membranes for gas separation

Cited by 77 publications

References 40 publications

Vacuum-assisted tailoring of pore structures of phenolic resin derived carbon membranes

Vacuum-assisted tailoring of pore structures of phenolic resin derived carbon membranes

Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part I: Preparation, characterization and gas permeation studies

Fine ultra-micropore control using the intrinsic viscosity of precursors for high performance carbon molecular sieve membranes

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