کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
638336 1456169 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of supported carbon molecular sieve membrane from novolac phenol–formaldehyde resin
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Preparation of supported carbon molecular sieve membrane from novolac phenol–formaldehyde resin
چکیده انگلیسی

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 °C for 1 h in air (heating rate: 0.5 °C/min) and then carbonized at 800 °C (heating rate: 0.5 °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 μm and a porous substrate. Pure gases of different molecular size (H2, CO2, O2, N2 and CH4) were used to test the carbon membrane permeance property. The membrane has a good selectivity for H2/N2 and H2/CH4 with H2 permeance of 4.05 × 10−6 cm3 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 303, Issues 1–2, 15 October 2007, Pages 80–85
نویسندگان
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