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    Wyświetlanie 1-3 z 3
    Tytuł:
    Thermal Analysis On The Kinetics Of Magnesium-Aluminum Layered Double Hydroxides In Different Heating Rates
    Analiza termiczna kinetyki rozkładu warstwowego podwójnego wodorotlenku magnezu aluminium przy różnych szybkościach grzania
    Autorzy:
    Hongbo, Y.
    Meiling, C.
    Xu, W.
    Hong, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/351862.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    layered double hydroxides
    thermal analysis
    kinetics
    warstwowy podwójny wodorotlenek
    analiza termiczna
    kinetyka
    Opis:
    The thermal decomposition of magnesium-aluminum layered double hydroxides (LDHs) was investigated by thermogravimetry analysis and differential scanning calorimetry (DSC) methods in argon environment. The influence of heating rates (including 2.5, 5, 10, 15 and 20K/min) on the thermal behavior of LDHs was revealed. By the methods of Kissinger and Flynn-Wall-Ozawa, the thermal kinetic parameters of activation energy and pre-exponential factor for the exothermic processes under non-isothermal conditions were calculated using the analysis of corresponding DSC curves.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1357-1359
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of quinoline from aqueous solutions by lignite, coking coal and anthracite. Adsorption kinetics
    Autorzy:
    Xu, H.
    Wang, Y.
    Huagn, G.
    Fan, G.
    Gao, L.
    Li, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/110664.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    quinoline adsorption
    coking coal
    kinetics
    adsorption activation energy
    coal adsorption
    Opis:
    Basing on the concept of circular economy, a novel method of industrial organic wastewater treatment by using adsorption on coal is introduced. Coal is used to adsorb organic pollutants from coking wastewaters. After adsorption, the coal would be used in its original purpose, as its value was not reduced and the pollutant was reused. Through the systemic circulation of coking wastewater zero emissions can be achieved. Lignite, coking coal and anthracite were used as adsorbents in batch experiments. The quinoline removal efficiency of coal adsorption was investigated. Both the coking coal and anthracite exhibited properties well-suited for quinoline adsorption removal. The experimental data were fitted to the pseudo-first- order and pseudo-second-order kinetic equations as well as intraparticle diffusion and Bangham models. An attempt was made to find the rate-limiting step involved in the adsorption processes. Both boundary-layer diffusion and intraparticle diffusion are likely involved in the rate-limiting mechanisms. Effect of pH on coal adsorptions by coking coal was investigated. The process of quinoline adsorption on coal was researched. The coal adsorption method for removing refractory organic pollutants is a great hope for achieving wastewater zero emission for coking plants.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 1; 397-408
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on the Mechanism and Kinetics of Polymorphic Transitions of ε CL-20 in Composite Systems
    Autorzy:
    Guo, X.-Y.
    Zhang, P.
    Xu, J.-J.
    Wang, Z.-H.
    Jiao, Q.-J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358032.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    polymorphic transition
    kinetics
    activation energy
    transition temperature
    Opis:
    In order to explore the polymorphic transition law for ε-CL-20 in composite systems, the polymorphic transition process of pure ε-CL-20 crystals stimulated by heat was investigated by the X-ray Diffraction (XRD) method, and the kinetic parameters of the polymorphic transition process were calculated (including the apparent activation energy Ea and the pre-exponential factor lnA). Meanwhile the effects of different additives on the polymorphic transition process and kinetics of ε-CL-20 were explored in detail. The experimental results showed that the ε-form tends to transform into the γ- form on heating and that the Ea and lnA for the transition process were 209.97 kJ/mol and 57.47, respectively. The first group of additives clearly promoted the polymorphic transition of ε-CL-20 and lowered the initial transition temperature and the activation energy. The second and third groups of additives inhibited the polymorphic transition of ε-CL-20 and raised the initial transition temperature and the activation energy.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 4; 689-702
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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