INVESTIGATION OF EFFICIENCY OF GAS SEPARATION ON NUCLEAR TRACK MEMBRANES WITH ULTRA-SMALL PORES / OVCHINNIKOV VV,SELEZNEV VD,SURGUCHEV VV,TOKMANTSEV VI // JOURNAL OF MEMBRANE SCIENCE. - 1991. - V. 55, l. 3. - P. 311-323.

ISSN/EISSN:

0376-7388 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The efficiency of the separation of some inert gases (helium, nitrogen, argon, krypton, xenon) and hydrogen on nuclear track membranes of polyethylene terephthalate (PET) with pores of size 2-10 nm have been investigated. The membranes were prepared either by the freeze-drying method or by partial contraction of the porous structure. Membranes with pores over 6 nm in diameter are found to have an ideal gas separation coefficient, close to the theoretical (Knudsen) one, under normal conditions. A gradual decrease in the size of the pores leads to an increase in the reduced ideal separation coefficient of the hydrogen-helium pair for membranes obtained by the freeze-drying method, and in that of the helium-argon and helium-nitrogen pairs for membranes obtained by partial ``healing{''} of pores. For other gas pairs a decrease in the separation coefficients was observed. A theoretical model is proposed that allows description of the observed regularities on the basis of the surface diffusion of components, taking into account the structural peculiarities of the membranes and the isothermal entrainment effects between free and adsorbed gas molecules.

Author keywords:

NUCLEAR TRACK MEMBRANES; GAS SEPARATION; THEORY; MICROPOROUS AND POROUS MEMBRANES; POLY(ETYLENE TEREPHTHALATE)

DOI:

10.1016/S0376-7388(00)80585-2

Web of Science ID:

ISI:A1991EY29100008

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN 15
Note	INTERNATIONAL SYMP ON MEMBRANES FOR GAS AND VAPOR SEPARATIONS, SUZDAL, USSR, FEB 27-MAR 05, 1989
Organization	EUROPEAN SOC MEMBRANE SCI \& TECHNOL
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Research-Areas	Engineering; Polymer Science
Web-of-Science-Categories	Engineering, Chemical; Polymer Science
Number-of-Cited-References	16
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	9
Journal-ISO	J. Membr. Sci.
Doc-Delivery-Number	EY291