On the prediction of separation factor and permeability in the separation of binary mixtures by pervaporation

Reduction of organosulfurs in gasoline has become an urgent requirement in the world, especially in China. The goal of this work focuses on removal of thiophene from binary mixtures of thiophene and n-heptane by means of pervaporation. The PEBAX homogenous film was prepared by coating. The swelling experiments of film were studied for the affinity of PEBAX film to thiophene. The swelling degree of film increased with increasing thiophene content in the mixtures. The result indicates the PEBAX film had preferential sorption to thiophene rather than n-heptane. Pervaporation experiments were studied for investigating separation properties of the film. The effect of thiophene concentration in feed and operation temperature on separation properties of the film was researched. The results of pervaporation showed that both total and thiophene flux increased with increase of thiophene content in the feed and temperature, but the separation factor deceased with their increase. The activity energy was calculated according to the Arrhenius relationship. This work may offer useful visions into the possibility of the separation of sulfur compounds from gasoline via pervaporation.

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A Separation Factor Method for the Analysis of Ideal Binary Mixtures in Gas-Solid Adsorption

Separation Science and Technology ◽

10.1080/01496398408060652 ◽

1984 ◽

Vol 19 (2-3) ◽

pp. 157-172 ◽

Cited By ~ 1

Author(s):

T. Victor Lee ◽

Jan-Chan Huang ◽

Richard Madey

Keyword(s):

Binary Mixtures ◽

Separation Factor ◽

Factor Method

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Removal of Hydrogen Sulfide from Gas Mixtures Using Membranes Impregnated with Ionic Liquids

Safety in Technosphere ◽

10.12737/article_5b5f0086e5b4d7.40486881 ◽

2018 ◽

Vol 7 (1) ◽

pp. 31-37

Author(s):

А. Ахметшина ◽

A. Ahmetshina ◽

А. Мечергуи ◽

A. Mechergui ◽

А. Петухов ◽

...

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Hydrogen Sulfide ◽

Transport Properties ◽

Binary Mixtures ◽

Separation Factor ◽

Gas Mixtures ◽

Porous Membranes ◽

Acidic Gases ◽

Gas Transport Properties

In this paper have been considered gas transport properties of porous membranes immobilized by 1-butyl‑3-methylimidazolium tetrafluoroborate (bmim [BF4]) and 1-butyl‑3-methylimidazolium acetate (bmim [ace]) toward CH4, CO2 and H2S. Have been investigated transport features of individual gases as well as theirs binary mixtures CO2/CH4 and H2S/CH4. It has been stated that for binary gas mixtures the highest efficiency of acidic gases separation is achieved on membranes containing bmim [ace]. It has been shown experimentally that for a membrane operating according to mechanism of simplified transport, the separation factor increases with diminishing of concentration for penetrant fixed by ionic liquid.

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On the Distribution of Isotopes in a Separation Column in Countercurrent Electromigration of Molten Binary Mixtures

Zeitschrift für Naturforschung A ◽

10.1515/zna-1983-0202 ◽

1983 ◽

Vol 38 (2) ◽

pp. 97-105

Author(s):

Isao Okada ◽

Arnold Lundén

Keyword(s):

Binary Mixtures ◽

Separation Factor ◽

Heavy Isotope ◽

Flow Equations ◽

Isotope Distribution ◽

Light Isotope ◽

Separation Column ◽

Common Anion

Abstract In countercurrent electromigration of molten binary mixtures with a common anion in which each cation is composed of two isotopes, the less mobile cation is enriched toward the anode, and, at the same time, the isotopes of this cation become distributed in a complicated way. Thus, the zone next to the anode where the heavy isotope is enriched is immediately followed by a region where a slight enrichment of the light isotope occurs, while for the more mobile cation the heavy isotope is enriched in both these regions. This phenomenon has been observed in experiments with the systems (Li-K)NO3 and (Li-K)Cl and it has also been reproduced by analyzing the flow equations for the constituent components numerically with a computer. It is verified that the existing formulation for the calculation of the elementary separation factor holds independent of whether there is such an anomaly in the isotope distribution for the less mobile cation.

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