Pore size control of microporous carbon membranes by post-synthesis activation and their use in a membrane reactor for dehydrogenation of methylcyclohexane

Hirota, Yuichiro; Ishikado, Akinori; Uchida, Yoshiyuki; Egashira, Yasuyuki; Nishiyama, Norikazu

doi:10.1016/j.memsci.2013.04.010

Cited by 36 publications

(29 citation statements)

References 39 publications

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“…Intense research efforts have been performed on the development of membrane separation. Various membranes, including palladium membranes, 3-5 amorphous silica membranes, 6,7 carbon membranes, 8 and organosilica membranes 9,10 have been applied to the OCH process and these membranes showed highly separation performance for H 2 . From the view point of separation efficiency, hydrocarbon-selective membranes are desired in the OCH process, because concentrations of aromatic hydrocarbon and cycloalkane are lower than that of H 2 after dehydrogenation reaction (e.g., C 6 H 12 !…”

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Separation of C₆H₆ and C₆H₁₂ from H₂ using ionic liquid/PVDF composite membrane

et al. 2015

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SignificanceIonic liquid/polyvinylidene fluoride composite membrane was successfully prepared by impregnation method and used for the separation on organic chemical hydride process. The separation factors of C 6 H 6 /H 2 and C 6 H 12 /H 2 in the ternary mixture system were 7500 and 300, respectively. The ionic liquid membrane showed an excellent possibility as a technology of H 2 purification in the organic chemical hydride process by removing aromatic hydrocarbon and cycloalkane simultaneously from the ternary system. V C 2015 American Institute of Chemical Engineers AIChE J, 62: 624-628, 2016

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Separation of C₆H₆ and C₆H₁₂ from H₂ using ionic liquid/PVDF composite membrane

et al. 2015

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“…In 2013, Hirota and co-workers [117] prepared CMSM by a vapor-phase method using furfuryl alcohol (FFA). The pore size of the carbon membranes was enlarged by activation using several gases and vapors such as H 2 , CO 2 , O 2 and steam.…”

Section: Cmsm Reactors For Dehydrogenation Reactionsmentioning

confidence: 99%

Recent Advances on Carbon Molecular Sieve Membranes (CMSMs) and Reactors

Tanco

Tanaka

2016

Processes

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Carbon molecular sieve membranes (CMSMs) are an important alternative for gas separation because of their ease of manufacture, high selectivity due to molecular sieve separation, and high permeance. The integration of separation by membranes and reaction in only one unit lead to a high degree of process integration/intensification, with associated benefits of increased energy, production efficiencies and reduced reactor or catalyst volume. This review focuses on recent advances in carbon molecular sieve membranes and their applications in membrane reactors.

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“…Previously, we developed a FFA carbon membrane with pore sizes optimized for H2 separation in the dehydrogenation of methylcyclohexane in a membrane reactor 19) . For the separation of H2/methylcyclohexane and H2/toluene (dehydrogenated chemical of methylcyclohexane), larger pore sizes are favorable for improving H2 permeance but should be less than 0.6 nm since the kinetic diameters of methylcyclohexane and toluene are about 0.60 nm.…”

Section: P O R E S I Z E C O N T R O L O F T H E F Fa C a R B O N Memmentioning

confidence: 99%

“…Activation is a common treatment used to control the pore size of carbon membranes. In our previous study, the pore size of the FFA carbon membranes was increased by post-synthesis activation using various gases and vapors such as H2, CO2, O2 and steam (H2O) 19) . Activation treatments using different gas/ vapors at different temperatures had various on the pore size and morphology of the FFA carbon membranes.…”

Section: P O R E S I Z E C O N T R O L O F T H E F Fa C a R B O N Memmentioning

confidence: 99%

“…We have prepared H2-permselective microporous carbon membranes by a vapor deposition polymerization (VDP) method using furfuryl alcohol (FFA) as the carbon source, and developed FFA carbon membranes with pore sizes optimized for various H2 purification processes 18), 19) . In addition, a quaternary ammonium salt-mediated method was developed for the direct preparation of microporous carbon membrane with pores larger than 0.4 nm 20), 21) .…”

Section: Introductionmentioning

confidence: 99%

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Pore Size Control of Microporous Carbon Membranes and Application to H<sub>2</sub> Separation

Hirota

Nishiyama

2016

J. Jpn. Petrol. Inst.

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Three methods of efficient pore size control for microporous carbon membranes were developed, (1) vaporphase synthesis of furfuryl alcohol (FFA) carbon membranes, (2) pore size control by post-activation and (3) quaternary ammonium salt-mediated method for the direct synthesis of microporous carbon membranes with large pores. (1) At first, a H2-permselective FFA carbon membrane with pore size of 0.30 nm was prepared through optimization of the conditions of FFA deposition and carbonization process. (2) Next, the FFA carbon membranes were activated using various gases and vapors such as H2, CO2, O2 and steam (H2O). Different pore sizes and morphological changes were observed by changing the activation agent and temperature. After activation using H2 at 700 , the pore size of the microporous carbon membrane was increased from 0.30 to 0.45 nm. (3) Quaternary ammonium salt-mediated synthesis was developed for the direct synthesis of microporous carbon membranes with pore size larger than 0.40 nm. Using two types of cationic tertiary amines with different chain lengths, microporous carbon membranes with uniform pores of 0.4 nm and 0.5 nm were successfully synthesized. Using these methods, microporous carbon membranes with uniform pore sizes from 0.30 to 0.50 nm were successfully prepared, and were used in various H2 separation processes. These microporous carbon membranes showed superior H2-permselectivity in various H2 separation processes such as H2/CO, H2/CO2 and dehydrogenation of organic hydrides in a membrane reactor. The present techniques are expected to achieve precise pore size control of microporous carbon membranes.

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Pore size control of microporous carbon membranes by post-synthesis activation and their use in a membrane reactor for dehydrogenation of methylcyclohexane

Cited by 36 publications

References 39 publications

Separation of C₆H₆ and C₆H₁₂ from H₂ using ionic liquid/PVDF composite membrane

Separation of C₆H₆ and C₆H₁₂ from H₂ using ionic liquid/PVDF composite membrane

Recent Advances on Carbon Molecular Sieve Membranes (CMSMs) and Reactors

Pore Size Control of Microporous Carbon Membranes and Application to H<sub>2</sub> Separation

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Pore size control of microporous carbon membranes by post-synthesis activation and their use in a membrane reactor for dehydrogenation of methylcyclohexane

Cited by 36 publications

References 39 publications

Separation of C6H6 and C6H12 from H2 using ionic liquid/PVDF composite membrane

Separation of C6H6 and C6H12 from H2 using ionic liquid/PVDF composite membrane

Recent Advances on Carbon Molecular Sieve Membranes (CMSMs) and Reactors

Pore Size Control of Microporous Carbon Membranes and Application to H<sub>2</sub> Separation

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Separation of C₆H₆ and C₆H₁₂ from H₂ using ionic liquid/PVDF composite membrane

Separation of C₆H₆ and C₆H₁₂ from H₂ using ionic liquid/PVDF composite membrane