Enhanced propylene/propane separation by carbonaceous membrane derived from poly (aryl ether ketone)/2,6-bis(4-azidobenzylidene)-4-methyl-cyclohexanone interpenetrating network

Chng, Mei Lin; Xiao, Youchang; Chung, Tai‐Shung; Toriida, Masahiro; Tamai, Shoji

doi:10.1016/j.carbon.2009.03.032

Cited by 62 publications

(42 citation statements)

References 43 publications

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“… C 3 H 6 /C 3 H 8 mixture selectivity as a function of C 3 H 6 permeance (at <50°C) for polymer, CMS, ZIF‐8, and silica membranes. The solid line shows the upper‐bound trade‐off curve for polymer membranes and CMS membranes reported in the literature to date.…”

Section: Resultsmentioning

confidence: 99%

“…Among them, using CMS for the separation of C 3 H 6 and C 3 H 8 is even more promising, because of the high product value and high energy‐intensity of the existing separation technology . Several research groups have successfully fabricated CMS membranes with superior C 3 H 6 /C 3 H 8 separation performance exceeding the upper bound curve between permeability and selectivity for conventional polymeric membranes, making CMS membrane one of the most promising candidates for C 3 H 6 /C 3 H 8 separation.…”

Section: Introductionmentioning

confidence: 99%

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Ultrathin carbon molecular sieve membrane for propylene/propane separation

Lin

Wei

et al. 2015

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com) Ultrathin (down to 300 nm), high quality carbon molecular sieve (CMS) membranes were synthesized on mesoporous c-alumina support by pyrolysis of defect free polymer films. The effect of membrane thickness on the micropore structure and gas transport properties of CMS membranes was studied with the feed of He/N 2 and C 3 H 6 /C 3 H 8 mixtures. Gas permeance increases with constant selectivity as the membrane thickness decreases to 520 nm. The 520-nm CMS membrane exhibits C 3 H 6 /C 3 H 8 mixture selectivity of 31 and C 3 H 6 permeance of 1.0 3 10 28 mol m 22 s 21 Pa 21 . Both C 3 H 8 permeance and He/N 2 selectivity increase, but the permeance of He, N 2 , and C 3 H 6 and the selectivity of C 3 H 6 /C 3 H 8 decrease with further decrease in membrane thickness from 520 to 300 nm. These results can be explained by the thickness-dependent chain mobility of the polymer film which yields thinner final CMS membranes with reduction in pore size and possible closure of C 3 H 6 -accessible micropores.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrathin carbon molecular sieve membrane for propylene/propane separation

Lin

Wei

et al. 2015

AIChE Journal

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“…Membranes have been widely explored for natural gas treatment [1,2], olefin-paraffin separation [3][4][5], and nitrogen enrichment from air [6]. Natural gas is the fastest-growing fossil fuel throughout the world, with consumption rising about 0.8% each year from 2012 to 2040.…”

Section: Introductionmentioning

confidence: 99%

Carbon molecular sieve membrane structure–property relationships for four novel 6FDA based polyimide precursors

Sanders

Kulkarni

et al. 2015

Journal of Membrane Science

126

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“…Chemically modified membranes in the form of immobilized liquid membranes, composite inorganic‐polymer membranes, zeolite membranes and carbon membranes have been experimented and reported to exhibit significantly huge improvements in the propylene permeance and separation factors (Table I). 3–11 However, when applied on a large scale these modified membranes are expensive and unstable. Consequently the scope for polymer‐based membranes widens.…”

Section: Introductionmentioning

confidence: 99%

Membranes of poly(phenylene oxide) and its copolymers: Synthesis, characterization, and application in recovery of propylene from a refinery off‐gas mixture

Gajbhiye

2012

J of Applied Polymer Sci

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Copolymers of 2,6-dimethyl-phenol (DMP) and 2,6-diphenyl-phenol (DPP) were synthesized in the initial molar ratio of 100 : 0 (S(PPO)), 90 : 10 (Co-A), 75 : 25 (Co-B), 65 : 35 (Co-C), and 0 : 100 (PDPPO). Dense membranes of 30 lm thickness were tested for single gas permeation and binary mixture separation of 55:45 (in mol %) propylene-propane at 30 C 6 2 C. Their performance was ultimately examined in the enrichment of propylene from a refinery off-gas mixture (ROG or also called as absorber tail gas, ATG) having the same composition as the ATG of a fluid catalytic cracking (FCC) unit of HPCL refinery, Visakhapatnam. The mixture contains C 1 -C 5 hydrocarbons and nonhydrocarbons such as CO, CO 2 , H 2 , and N 2 . A detailed permeation study of the hydrocarbon part of ATG revealed that using S(PPO) and Co-A, propylene could be upgraded from $ 29 mol % (on nonhydrocarbon free basis) to 62.2 and 74.4 mol % with propylene/propane selectivity ratio of 5.99 and 8.45, respectively. The structure of polymers was characterized by Fourier transform infrared (FTIR), proton nuclear magnetic resonance (Proton NMR), viscosity measurements. Scanning electron microscope (SEM), wide angle X-ray diffraction (WAXD), density and fractional free volume measurements were used for studying membrane morphology. Dynamic mechanical thermal analyzer (DMTA) and tensile testing were carried to find glass transition temperature (T g ) and mechanical properties. The relative differences observed in gas permeation of these polymers were correlated with the physical properties measured. S(PPO) and Co-A were identified as potential materials for the upgradation of propylene from refinery off-gas streams.

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Enhanced propylene/propane separation by carbonaceous membrane derived from poly (aryl ether ketone)/2,6-bis(4-azidobenzylidene)-4-methyl-cyclohexanone interpenetrating network

Cited by 62 publications

References 43 publications

Ultrathin carbon molecular sieve membrane for propylene/propane separation

Ultrathin carbon molecular sieve membrane for propylene/propane separation

Carbon molecular sieve membrane structure–property relationships for four novel 6FDA based polyimide precursors

Membranes of poly(phenylene oxide) and its copolymers: Synthesis, characterization, and application in recovery of propylene from a refinery off‐gas mixture

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