Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/18810

Preparation of supported carbon molecular sieve membrane from novolac phenol-formaldehyde resin

Authors Wei, Wei
Qin, Guotong
Hu, Haoquan HKUST affiliated (currently or previously)
You, Longbo
Chen, Guohua View this author's profile
Issue Date 2007
Source Journal of membrane science , v. 303, (1-2), 2007, OCT 15, p. 80-85
Summary An asymmetric carbon membrane was prepared by coating alcohol solution of novolac phenol-formaldehyde resin containing a little hexamine on a porous resin support from the same material. After drying in air for two days at room temperature, the coated support was heated at 150 degrees C for I h in air (heating rate: 0.5 degrees C/min) and then carbonized at 800 degrees C (heating rate: 0.5 degrees C/min) in Ar atmosphere. The support and the membrane layer were carbonized simultaneously. The coating-pyrolysis cycle only needed one time. SEM photographs showed the carbon membrane had an asymmetric structure formed by a dense skin layer with a thickness of around 35 mu m and a porous substrate. Pure gases of different molecular size (H-2, CO2, O-2, N-2 and CH4) were used to test the carbon membrane permeance property. The membrane has a good selectivity for H-2/N-2 and H-2/CH4 with H-2 permeance of 4.05 x 10(-6) cm(3) cm(-2) s(-1) cmHg(-1). The permeance is independent of pressure. The results indicate that the gases transport through the membrane according to molecular sieve mechanism. (c) 2007 Elsevier B.V. All rights reserved.
Subjects
ISSN 0376-7388
Language English
Format Article
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