Silicon carbide membranes for gas separation applications

Bahman Elyassi; Muhammad Sahimi; Theodore T. Tsotsis

doi:10.1016/j.memsci.2006.11.027

Silicon carbide membranes for gas separation applications

Bahman Elyassi, Muhammad Sahimi, Theodore T. Tsotsis

Research output: Contribution to journal › Article › peer-review

139 Scopus citations

Abstract

SiC microporous membranes were prepared by the pyrolysis of thin allyl-hydridopolycarbosilane (AHPCS) films coated, using a combination of slip-casting and dip-coating techniques, on tubular silicon carbide macroporous supports. Combining slip-casting with dip-coating significantly improved the reproducibility in preparing high quality membranes. The membranes prepared, so far, exhibited an ideal H₂/CO₂ selectivity in the range of 42-96, and a H₂/CH₄ ideal selectivity in the range of 29-78. Separation factors measured with the same membranes, using equimolar binary mixtures of H₂ in CO₂ and H₂ in CH₄, were similar to the ideal selectivity values. Steam stability experiments with the membranes lasting 21 days, using an equimolar flowing mixture of He/H₂O at 200 °C, indicated some initial decline in the permeance of He, after which the permeance became stable at these conditions.

Original language	English (US)
Pages (from-to)	290-297
Number of pages	8
Journal	Journal of Membrane Science
Volume	288
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2006.11.027
State	Published - Feb 1 2007
Externally published	Yes

Bibliographical note

Funding Information:
The support of the US Department of Energy, the National Science Foundation, and NASA is gratefully acknowledged. Superior Graphite Co. and Sumitomo Osaka Cement Co. are acknowledged for kindly providing us the SiC powders. The authors would also like to thank Mr. Tae Kim for assistance in performing the SEM and XRD analyses.

Keywords

AHPCS
Dip-coating
Gas separation
Silicon carbide membrane
Slip-coating

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10.1016/j.memsci.2006.11.027

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title = "Silicon carbide membranes for gas separation applications",

abstract = "SiC microporous membranes were prepared by the pyrolysis of thin allyl-hydridopolycarbosilane (AHPCS) films coated, using a combination of slip-casting and dip-coating techniques, on tubular silicon carbide macroporous supports. Combining slip-casting with dip-coating significantly improved the reproducibility in preparing high quality membranes. The membranes prepared, so far, exhibited an ideal H2/CO2 selectivity in the range of 42-96, and a H2/CH4 ideal selectivity in the range of 29-78. Separation factors measured with the same membranes, using equimolar binary mixtures of H2 in CO2 and H2 in CH4, were similar to the ideal selectivity values. Steam stability experiments with the membranes lasting 21 days, using an equimolar flowing mixture of He/H2O at 200 °C, indicated some initial decline in the permeance of He, after which the permeance became stable at these conditions.",

keywords = "AHPCS, Dip-coating, Gas separation, Silicon carbide membrane, Slip-coating",

author = "Bahman Elyassi and Muhammad Sahimi and Tsotsis, \{Theodore T.\}",

note = "Funding Information: The support of the US Department of Energy, the National Science Foundation, and NASA is gratefully acknowledged. Superior Graphite Co. and Sumitomo Osaka Cement Co. are acknowledged for kindly providing us the SiC powders. The authors would also like to thank Mr. Tae Kim for assistance in performing the SEM and XRD analyses.",

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doi = "10.1016/j.memsci.2006.11.027",

language = "English (US)",

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T1 - Silicon carbide membranes for gas separation applications

AU - Elyassi, Bahman

AU - Sahimi, Muhammad

AU - Tsotsis, Theodore T.

N1 - Funding Information: The support of the US Department of Energy, the National Science Foundation, and NASA is gratefully acknowledged. Superior Graphite Co. and Sumitomo Osaka Cement Co. are acknowledged for kindly providing us the SiC powders. The authors would also like to thank Mr. Tae Kim for assistance in performing the SEM and XRD analyses.

PY - 2007/2/1

Y1 - 2007/2/1

N2 - SiC microporous membranes were prepared by the pyrolysis of thin allyl-hydridopolycarbosilane (AHPCS) films coated, using a combination of slip-casting and dip-coating techniques, on tubular silicon carbide macroporous supports. Combining slip-casting with dip-coating significantly improved the reproducibility in preparing high quality membranes. The membranes prepared, so far, exhibited an ideal H2/CO2 selectivity in the range of 42-96, and a H2/CH4 ideal selectivity in the range of 29-78. Separation factors measured with the same membranes, using equimolar binary mixtures of H2 in CO2 and H2 in CH4, were similar to the ideal selectivity values. Steam stability experiments with the membranes lasting 21 days, using an equimolar flowing mixture of He/H2O at 200 °C, indicated some initial decline in the permeance of He, after which the permeance became stable at these conditions.

AB - SiC microporous membranes were prepared by the pyrolysis of thin allyl-hydridopolycarbosilane (AHPCS) films coated, using a combination of slip-casting and dip-coating techniques, on tubular silicon carbide macroporous supports. Combining slip-casting with dip-coating significantly improved the reproducibility in preparing high quality membranes. The membranes prepared, so far, exhibited an ideal H2/CO2 selectivity in the range of 42-96, and a H2/CH4 ideal selectivity in the range of 29-78. Separation factors measured with the same membranes, using equimolar binary mixtures of H2 in CO2 and H2 in CH4, were similar to the ideal selectivity values. Steam stability experiments with the membranes lasting 21 days, using an equimolar flowing mixture of He/H2O at 200 °C, indicated some initial decline in the permeance of He, after which the permeance became stable at these conditions.

KW - AHPCS

KW - Dip-coating

KW - Gas separation

KW - Silicon carbide membrane

KW - Slip-coating

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ER -

Silicon carbide membranes for gas separation applications

Abstract

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