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    Wyświetlanie 1-6 z 6
    Tytuł:
    Water-paraffin dispersion systems: manufacturing and application
    Autorzy:
    Yovchenko, Alla
    Bespalko, Sergii
    Tryhub, Oksana
    Poliakov, Sviatoslav
    Baret, Guy
    Munoz, Miranda Alberto
    Powiązania:
    https://bibliotekanauki.pl/articles/1429993.pdf
    Data publikacji:
    2020
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    heat storage
    phase change material
    phase change suspension
    surface active agent
    enthalpy
    solar heating system
    magazynowanie ciepła
    materiał o przemianie fazowej
    środek powierzchniowo czynny
    entalpia
    system ogrzewania słonecznego
    Opis:
    The paper presents the study results of the stability and heat storage capacity of paraffin-in-water phase change suspensions (PCSs) obtained by the homogenization of paraffin and water in the developed rotary hydrodynamic homogenizer. The optimal concentration of components for obtaining stable paraffin-in-water suspensions is found. It is shown that the stable PCSs in the form of pastes, gels, and liquids can be obtained depending on the concentration of water, paraffin, and the surface active agent (SAA) as well as its type. In addition, the scheme of the solar heating system with the heat storage tank where the PCS functions both as the heat transfer fluid and the heat storage media is presented. It is shown that the use of PCS in the domestic solar heating system allowed the heat storage capacity of the storage tank to be increased by 25% as a result of the high fusion heat of paraffin and the high value of the water specific heat capacity. The estimation of the saving rate from applying fluid PCS as a heat storage medium is also presented and discussed.
    Źródło:
    Acta Innovations; 2020, 36; 31-47
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ion exchange equilibrium studies of uni-univalent H+/Na+ and uni-bivalent H+/Mg2+ ion exchange reactions using nuclear grade resin Indion-223
    Autorzy:
    Singare, P. U.
    Mohammed, A. L. K.
    Dixit, N. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/412153.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    cation exchange
    nuclear grade resins
    ion exchangers
    change in enthalpy
    equilibrium constant in standard state
    Indion-223
    Opis:
    In the present investigation the uni-univalent and uni-bivalent ion exchange reactions were studied using nuclear grade anion exchange resin Indion-223 in H+ form. It was observed that for H+/Na+ uni-univalet ion exchange reaction, with rise in temperature the equilibrium constants K values increases from 0.01389 to 0.01855. Similarly increase in K values was observed from 0.000177 to 0.000333 for H+/Mg2+ uni-bivalet ion exchange reaction. The increase in equilibrium constant values with rise in temperature indicate endothermic ion exchange reactions having the enthalpy change values of 25.55 and 51.46 kJ/ mol respectively. It is expected that the present study will provide valuable information in order to decide about the selection of those resins for efficient separation of various ionic species present in the industrial waste water effluents.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 14, 2; 199-207
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of uni-univalent H+/K+ and uni-bivalent H+/Mg2+ ion exchange reactions using nuclear grade resin Indion-223
    Autorzy:
    Singare, P. U.
    Mohammed, A. K. L.
    Dixit, N. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/411848.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ion exchange equilibrium
    nuclear grade resins
    cation exchange
    enthalpy change
    equilibrium constant
    Indion-223
    Opis:
    In the present paper the uni-univalent and uni-bivalent ion exchange reactions were investigated using nuclear grade anion exchange resin Indion-223 in H+ form. For both H+/K+ uni-univalet ion exchange reactions and H+/Mg2+ uni-bivalet ion exchange reactions, the equilibrium constant K values increases from 0.01710 to 0.02374 and from 0.000177 to 0.000333 respectively as the reaction temperature rises from 35.0 °C to 45.0 °C. The increase in K values with temperature suggest endothermic ion exchange reactions having the enthalpy change values of 22.72 and 51.46 kJ/ mol respectively. The results of such studies will help in selection of suitable ion exchange resins in order to bring about efficient separation of different ionic species present in the waste water effluents released from nuclear as well as chemical process industries.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 14, 2; 231-239
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on preferential selectivity of nuclear grade resin Indion-223 towards some bivalent ions
    Autorzy:
    Singare, P. U.
    Mohammed, A. L. K.
    Dixit, N. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/412085.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    bivalent exchange reactions
    nuclear grade resins
    cation exchange
    reaction thermodynamics
    enthalpy change
    ionic selectivity
    equilibrium constant
    Indion-223
    Opis:
    In the present paper attempts are made to understand the selectivity of nuclear grade cation exchange resin Indion-223 in H+ form towards Ca2+ and Mg2+ bivalent ions in the solution based on thermodynamic concept. It was observed that with rise in temperature the equilibrium constant K values for H+/Ca2+ uni-bivalet ion exchange reactions increases from 0.000397 to 0.000639. Similarly for H+/Mg2+ uni-bivalet ion exchange reactions the equilibrium constant K values increases from 0.000177 to 0.000333. The increase in equilibrium constant values with rise in temperature indicate endothermic ion exchange reactions having the enthalpy change values of 38.92 and 51.46 kJ/ mol respectively. The difference in K values and enthalpy values were used to predict the selectivity behaviour of the resin towards the Ca2+ and Mg2+ bivalent ions in the solution. The thermodynamic concept of the present study can be applied to understand the selectivity behaviour of different nuclear as well as non-nuclear grade resins towards wide range of ionic species present in the exchanging liquid medium.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 15; 11-21
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic study to evaluate the selectivity behaviour of nuclear grade resin Indion-223 towards some univalent ions
    Autorzy:
    Singare, P. U.
    Mohammed, A. L. K.
    Dixit, N. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/412486.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    uni-univalent ion exchange reactions
    ionic selectivity
    nuclear grade resins
    cation exchangers
    enthalpy change
    equilibrium constant
    Indion-223
    Opis:
    The present paper deals with the application of thermodynamic concept in understanding the preferential selectivity of nuclear grade anion exchange resin Indion-223 in H+ form towards Na+ and K+ ions in the solution. In the study it was observed that the equilibrium constants K values for H+/Na+ and H+/K+ uni-univalet ion exchange reactions increases from 0.01389 to 0.01855 and from 0.01710 to 0.02374 respectively as the temperature increases from 35.0 °C to 45.0 °C. The increase in K values with rise in temperature suggests endothermic ion exchange reactions having the enthalpy change values of 25.55 and 22.72 kJ/ mol respectively. Based on difference in K values and enthalpy values for the two uni-univalent ion exchange reactions, the preferential selectivity of the resin for the univalent ions in the solution was predicted. From the results of present study, it appears that the experimental technique used here can be applied further to understand the ionic selectivity of different industrial grade ion exchange resins. It is expected that such studies will provide valuable information in order to decide about the selection of those resins for efficient separation of various ionic species present in the industrial waste water effluents.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 15; 22-29
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamics of uni-univalent H+/K+ and uni-bivalent H+/Ca2+ ion exchange reactions using nuclear grade resin Indion-223
    Autorzy:
    Singare, P. U.
    Mohammed, A. L. K.
    Dixit, N. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/412388.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ion exchange
    nuclear grade resins
    cation exchangers
    enthalpy change
    standard equilibrium constant
    Indion-223
    Opis:
    The present paper deals with the thermodynamic of uni-univalent and uni-bivalent ion exchange reactions using nuclear grade anion exchange resin Indion-223. It was observed that with rise in temperature the equilibrium constants K values for H+/K+ uni-univalet ion exchange reaction increases from 0.01710 to 0.02374. Similarly for H+/Ca2+ uni-bivalet ion exchange reaction the equilibrium constants K values increases from 0.000397 to 0.000639. The increase in K values with rise in temperature for both the reactions indicates its endothermic nature having the enthalpy change values of 22.72 and 38.92 kJ/ mol respectively. The technique used here can be extended further to standardise the process parameters in order to bring about the efficient separation of the desired ionic species from the solution.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 14, 2; 190-198
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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