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Experimental Evaluation of CO_2/N_2 Mixture Separation by Multi-multi-walled Carbon Nanotube

100%

Khalili S., Ghoreyshi A., Jahanshahi M., Davoodi M.

Acta Physica Polonica A

2013

vol. 123

issue 2

230-232

In order to examine the ability of multi-multi-walled carbon nanotube for CO_2 separation from flue gas, uptakes of CO_2 and N_2 were measured at temperatures of 288 K, 298 K and 308 K over the pressure range 1 to 40 bar using volumetric method. The experimental data was fitted by the Langmuir and Frendlich model isotherms. The same shape of isotherms introduced a common mechanism of adsorption but the amount of CO_2 adsorbed on multi-multi-walled carbon nanotube was 2.5 times higher than N_2 adsorption which indicated the possibility of CO_2 removal from flue gases using adsorption process with multi-multi-walled carbon nanotube as the adsorbent. Isosteric heat of adsorption was evaluated from a set of isotherms based on the Clausius-Clapeyron equation.

Miscibility of Perylene Derivatives with Fatty Acid in Two-Dimensional Binary Mixture

100%

Makowiecki J., Martynski T.

vol. 126

issue 3

757-763

Two component mixtures of a fluorescent perylene dye (derivative of 3,4,9,10-perylenetetracarboxylic acid) with arachidic acid in the whole range of mole fraction have been investigated in form of molecular monolayers at the air-water interface at different pH of the water subphase. Miscibility of the components in the Langmuir monolayers have been examined for pH 3 and pH 13 of the subphase. Using the Langmuir-Blodgett technique the monolayers were transferred onto freshly cleaved mica sheets and morphology of the films was analyzed using atomic force microscopy working in tapping mode. Investigation of the components miscibility in monolayers, determined by mean molecular area and surface pressure analysis reveals different behavior of the mixtures depending on pH of the subphase. Atomic force microscopy morphology images of the Langmuir-Blodgett films strongly support conclusion about the components mixing and coverage of the mica surface. It has been found that onto acidic subphases components are only miscible in vestigial form, whereas on alkaline the miscibility is strongly affected by the dye concentration.

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2 Acta Physica Polonica A

1 2014

1 2013

1 Davoodi M.

1 Ghoreyshi A.

1 Jahanshahi M.

1 Khalili S.

1 Makowiecki J.

1 Martynski T.

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Experimental Evaluation of CO_2/N_2 Mixture Separation by Multi-multi-walled Carbon Nanotube

Miscibility of Perylene Derivatives with Fatty Acid in Two-Dimensional Binary Mixture