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6Å molecular sieve properties of saran-type carbons

✍ Scribed by T.G. Lamond; J.E. Metcalfe III; P.L. Walker Jr.

Publisher
Elsevier Science
Year
1965
Tongue
English
Weight
428 KB
Volume
3
Category
Article
ISSN
0008-6223

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✦ Synopsis

The results of a molecular probe study on two Saran carbons prepared up to 1000°C and on pol$&ylidene chloiide'carbons prepared up io 1500°C' are reported. The Saran carbons -adsorb appreciably more isobutane than neopentane over the ahole carbonization range, indicating 68, molecular sieve properties. Benzene and cyclohexane are also adsorbed to an appreciably greater extent than neopentane. Polyvinylidene chloride carbons prepared at comparable temperatures adsorb neopentane freely; neopentane molecular sieve effects are only observed for samples heated above 1200°C. It is concluded that the observed molecular sieve effects are due to slit-shaped pore constrictions having a size between ca. 4.5 and 5.718 in thickness and connecting cavities of at least ca. 12A in thickness.

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