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    Wyświetlanie 1-6 z 6
    Tytuł:
    Insights into hydrodynamics of spinning fluids reactor
    Autorzy:
    Dargacz, A.
    Aranowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/109782.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hydrodynamics
    spinning fluids reactor
    pressure field distribution
    separation
    flotation
    Opis:
    Spinning fluids reactor (SFR) is one of the most efficient gas-liquid contacting system with high potential of application in many fields. The unique solution of SFR is the contacting of two spinning fluids which generated centrifugal force. The aim of this study was to investigate the pressure field distribution on the inner surface of reactors dispersing element. Obtained results confirm the high heterogeneity of the field pressure in the reactor system with a cylindrical wall. This is due to the low tangential force generated by rotating liquid on a cylindrical wall, and pressure drop in the locations of surface irregularities. The change of the sparger element to conical shape element increases the pressure exerted by fluid on the wall. In this case the effects of solid particles and inequality in the fluid flow are negligibly small compared to the measured pressure exerted on the sparger element.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 1; 173-183
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wetting processes in supported ionic liquid membranes technology
    Autorzy:
    Cichowska-Kopczynska, I.
    Joskowska, M.
    Aranowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/110341.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ionic liquid
    supported ionic liquid membrane
    contact angle
    wettability
    swelling
    Opis:
    Ionic liquids are widely used in supported ionic liquid membranes technology, especially in gas separation and purification processes. This work characterizes the ability of ionic liquids to wet commercially available porous supports used for such purposes. Characterization of supports and membrane phases was carried out in order to determine factors influencing wetting process. Experimental method based on capillary rise is widely used for porous media characterization (i.e. pore radius, contact angle). Measurements of penetration distance or liquid mass are two main experimental methods, in which the Washburn equation is a basic instrument to analyze the obtained results. However, polymeric porous supports do not meet Washburn assumptions and the method is loaded with human errors, so the sessile drop method was used. The rate of wetting influences swelling effects and therefore changes in permeation path during gas separation processes are observed. Influence of ionic liquids structure on wetting and swelling of porous supports was investigated. The families of 1-alkyl-3-methylimidazolium (Cnmim), ammonium (Nnnnn), 1-alkyl-1-methylpyrrolidinium (CnPyrr) and 1-alkylpyridinium (CnPy) compounds with variable alkyl chain lengths in cation structures and changeable anions were taken into account in wetting and swelling experiments.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 1; 373-386
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of intensity mixing on the digestion process
    Autorzy:
    Aranowski, R.
    Dębski, B.
    Cichowska-Kopczyńska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191813.pdf
    Data publikacji:
    2019
    Wydawca:
    Gdańska Szkoła Wyższa
    Tematy:
    methane fermentation
    mixing of fermentation bioreactor
    mechanical mixing
    efficiency of fermentation
    Opis:
    The basics of convection, mechanical, hydraulic and bubbling mixing used in methane fermentation technologies are discussed. The impact of the intensity of mechanical mixing on the quality and quantity of biogas as well as the course of the fermentation process was evaluated. The influence of the paddle agitator speed rate on quasi-continuous fermentation was investigated. Fermentation was carried out under mesophilic conditions with a hydraulic retention time of 21 days. A 10% increase in biogas production was observed with the increase of the speed of mixing from 60 to 70 min-1 without a significant change in the composition of biogas and other process parameters.
    Źródło:
    Eco-Energetics: technologies, environment, law and economy; 2019, 2; 9--14
    2657-5922
    2657-7674
    Pojawia się w:
    Eco-Energetics: technologies, environment, law and economy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separation of CO2 from flue gas in air-sparged hydrocyclone (ASH) reactor
    Autorzy:
    Żurawska, M.
    Hupka, J.
    Aranowski, R.
    Misiuk, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/346905.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    adsorption
    carbon dioxide
    alkaline solution
    ASH technology
    Opis:
    Laboratory results of an initial study on CO2 removal from gas mixture by means of the air-sparged hydrocyclone (ASH) technology are reported. The CO2 absorption rate into sodium hydroxide aqueous solution was studied on a laboratory and pilot scale. The air flow rate was 900 dm³/min and the alkaline solution flow rate was 15 dm³/min in the case of pilot scale. The influence of CO2 concentration, pH of the liquid phase, the gas flow rate, and the alkaline solution flow rate on the efficiency of the process was investigated. An increase in the alkaline concentration significantly enhanced the CO2 absorption. A very low distribution of bubble sizes enhanced the carbon dioxide absorption, too.
    Źródło:
    Ars Separatoria Acta; 2006, 4; 43-49
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wetting of surfaces with ionic liquids
    Autorzy:
    Poleski, M.
    Luczak, J.
    Aranowski, R.
    Jungnickel, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/110857.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ionic liquid
    wettability
    contact angle
    capillary rise
    surface interactions
    Opis:
    The paper focuses on assessing wettability of surfaces modified with ionic liquid solutions. Dialkylimidazolium chlorides have been selected as the test group, because of their immediate availabil-ity and limited previous research. Contact angle of selected ionic liquid solutions have been measured with two methods: capillary rise test and simplified sitting droplet analysis, performed by means of digital camera. During tests the extremely high viscosity of dialkylimidazolium chlorides has been observed to drop rapidly with prolonged exposition to atmospheric moisture and measured experimentally with Karl-Fischer titration and viscosity measurements. Contact angles of selected ionic liquids have been presented.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 1; 277-286
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and physicochemical characterisation of ceramic supports for suported liquid membranes
    Autorzy:
    Cichowska-Kopczynska, I.
    Joskowska, M.
    Wojciechowska, A.
    Aranowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/109638.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    glass cullet
    recycling
    porous material
    membranes
    Opis:
    Supported liquids membranes are very promising products. They have been intensively inves-tigated in last two decades and widely used in many technologies especially in gas separation and purifi-cation processes. A key aspect in obtaining satisfying effectiveness and long membrane lifetime is a proper choice of ionic liquid and polymeric or ceramic support. Properties of both affect the processes of obtaining useful supported ionic liquid membranes. In comparison to polymeric membranes, ceramic ones are slightly thicker, however they are thermally and mechanically more stable. Our research was aimed at sintering fine glass particles of 500 to 45 μm in size in order to prepare porous membranes which can be used as supports for liquid membranes. Dextrin and borax were used as pore-making agents. The membranes, as disks 35 mm in diameter and 3 mm of thickness, were prepared. The porosity was determined using absorption method. It was found, that the porosity could be controlled by changing the applied pressure from 1 to 5 MPa, particle size distribution, sintering temperature, type and amount of pore-enhancing agents.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 1; 287-300
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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