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Wyszukujesz frazę "membrane separation" wg kryterium: Temat

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    Wyświetlanie 1-7 z 7
    Tytuł:
    The separation of carbon dioxide from CO2/N2/O2 mixtures using polyimide and polysulphone membranes
    Autorzy:
    Jaschik, M.
    Tańczyk, M.
    Janusz-Cygan, A.
    Wojdyła, A.
    Warmuziński, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/185496.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    membrane separation
    modified polyimide
    modified polysulphone
    CO2 capture
    separacja membranowa
    wychwytywanie CO2
    Opis:
    Results are presented concerning the separation of the mixtures of carbon dioxide, nitrogen and oxygen in membrane modules with modified polysulphone or polyimide as active layers. The feed gas was a mixture with composition corresponding to that of a stream leaving stage 1 of a hybrid adsorptivemembrane process for the removal of CO2 from dry flue gas. In gas streams containing 70 vol.% of CO2, O2 content was varied between 0 and 5 vol.%. It is found that the presence of oxygen in the feed gas lowers the purity of the product CO2 in all the modules studied, while the recovery depends on the module. In the PRISM module (Air Products) an increase in O2 feed concentration, for the maximum permeate purity, led to a rise in CO2 recovery, whereas for the UBE modules the recovery did not change.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 4; 449--456
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of polypropylene membranes by ion implantation
    Autorzy:
    Kotra-Konicka, K.
    Kalbarczyk, J.
    Gac, J.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/185296.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ion implantation
    polymer membranes
    membrane separation
    polymer surface modification
    implantacja jonów
    membrany polimerowe
    separacja membranowa
    polimerowa modyfikacja powierzchni
    Opis:
    The influence of ion implantation on the structure and properties of polymers is a very complex issue. Many physical and chemical processes taking place during ion bombardment must be taken into consideration. The complexity of the process may exert both positive and negative influence on the structure of the material. The goal of this paper is to investigate the influence of H+, He+ and Ar+ ion implantation on the properties of polypropylene membranes used in filtration processes and in consequence on fouling phenomena. It has appeared that the ion bombardment caused the chemical modification of membranes which has led to decrease of hydrophobicity. The increase of protein adsorption on membrane surface has also been observed.
    Źródło:
    Chemical and Process Engineering; 2016, 37, 3; 331-339
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Membrane gas separation module with pulsed retentate for low-permeable component recovery
    Autorzy:
    Battalov, Stanislav V.
    Trubyanov, Maxim M.
    Puzanov, Egor S.
    Sazanova, Tatyana S.
    Drozdov, Pavel N
    Vorotyntsev, Ilya V.
    Powiązania:
    https://bibliotekanauki.pl/articles/185429.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    membrane gas separation
    unsteady-state operation
    process intensification
    separation
    efficiency
    membrane module
    separacja gazów membranowych
    operacja niestabilna
    intensyfikacja procesu
    separacja
    wydajność
    moduł membranowy
    Opis:
    The paper presents the experimentalstudy of a novel unsteady-statemembrane gas separation approachfor recovery of a slow-permeant component in the membrane module with periodical retentate with-drawals. The case study consisted in the separation of binary test mixtures based on the fast-permeantmain component (N2O, C2H2) and the slow-permeant impurity (1% vol. of N2)using a radial counter-current membrane module. The novel semi-batch withdrawal technique was shown to intensify theseparation process and provide up to 40% increase in separation efficiency compared to a steady-stateoperation of the same productivity.
    Źródło:
    Chemical and Process Engineering; 2019, 40, 1; 57--65
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical interpretation of a mathematical model of membrane gas separation with energy transfer by gas flowing in a channel to gas penetrating this channel from the adjacent channel
    Autorzy:
    Szwast, M.
    Szwast, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/185839.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gas separation
    membrane
    mathematical model
    separacja gazów
    membrana
    model matematyczny
    Opis:
    Comparative calculations with a mathematical model designed by the authors, which takes into consideration energy transfer from gas flowing through a given channel to gas which penetrates this channel from an adjacent channel, as well as a model which omits this phenomenon, respectively, were made for the process of separating gas mixtures carried out with an inert sweep gas in the fourend capillary membrane module. Calculations were made for the process of biogas separation using a PMSP polymer membrane, relative to helium as the sweep gas. It was demonstrated that omitting the energy transfer in the mathematical model might lead to obtaining results which indicate that the capacity of the process expressed by the value of feed flux subjected to separation is by several percent higher than in reality.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 2; 209--222
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the absorbing pervaporation technique for ammonia recovery after the haber process
    Autorzy:
    Atlaskin, A.
    Petukhov, A. N.
    Yanbikov, N. R.
    Salnikova, M.E.
    Sergeeva, M. S.
    Vorotyntsev, V. M.
    Vorotyntsev, I. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/184857.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gas separation
    absorbing pervaporation
    ammonia
    process intensification
    membrane
    separacja gazów
    amoniak
    intensyfikacja procesu
    membrana
    Opis:
    A novel absorbing pervaporation hybrid technique has been evaluated experimentally for the recovery of ammonia from the gas mixture in a recycle loop of synthesis plants. This process of hybridization brings together the combination of energy-efficient membrane gas separation based on poly(dimethylsiloxane) poly(diphenylsilsesquioxane) with a high selective sorption technique where a water solution with polyethylene glycol 400 (PEG-400) was used as the liquid absorbent. Process efficiency was studied using the pure and mixed gases. The influence of PEG-400 content in aqueous solutions on process selectivity and separation efficiency was studied. The ammonia recovery efficiency evaluation of an absorbing pervaporation technique was performed and compared with the conventional membrane gas separation. It was shown that the absorbing pervaporation technique outperforms the conventional membrane method in the whole range of productivity, producing the ammonia with a purity of 99.93 vol.% using the PEG 80 wt.% solution. The proposed method may be considered as an attractive solution in the optimization of the Haber process.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 3; 323--333
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of technical and economic parameters of an ionic transport membrane air separation unit working in a supercritical power plant
    Autorzy:
    Kotowicz, J.
    Michalski, S.
    Balicki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/185699.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    four-end type ionic transport membrane module
    air separation
    supercritical power plant
    separacja powietrza
    elektrownia nadkrytyczna
    Opis:
    In this paper an air separation unit was analyzed. The unit consisted of: an ionic transport membrane contained in a four-end type module, an air compressor, an expander fed by gas that remains after oxygen separation and heat exchangers which heat the air and recirculated flue gas to the membrane operating temperature (850 °C). The air separation unit works in a power plant with electrical power equal to 600 MW. This power plant additionally consists of: an oxy-type pulverized-fuel boiler, a steam turbine unit and a carbon dioxide capture unit. Life steam parameters are 30 MPa/650 °C and reheated steam parameters are 6 MPa/670 °C. The listed units were analyzed. For constant electrical power of the power plant technical parameters of the air separation unit for two oxygen recovery rate (65% and 95%) were determined. One of such parameters is ionic membrane surface area. In this paper the formulated equation is presented. The remaining technical parameters of the air separation unit are, among others: heat exchange surface area, power of the air compressor, power of the expander and auxiliary power. Using the listed quantities, the economic parameters, such as costs of air separation unit and of individual components were determined. These quantities allowed to determine investment costs of construction of the air separation unit. In addition, they were compared with investment costs for the entire oxy-type power plant.
    Źródło:
    Chemical and Process Engineering; 2016, 37, 3; 359-371
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Designing of membrane contactors with cross-counter current flow
    Autorzy:
    Kołtuniewicz, A.B.
    Modelski, S.
    Witek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/952681.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    membrane contactor
    sorption process
    integrated processes of separation
    designing
    surface renewal theory
    stycznik membranowy
    proces sorpcji
    zintegrowany proces separacji
    projektowanie
    teoria odnowienie powierzchni
    Opis:
    The knowledge about membrane contactors is growing rapidly but is still insufficient for a reliable designing. This paper presents a new type of membrane contactors that are integrated with one of the following ways of separation by using absorbents, micelles, flocculants, functionalized polymers, molecular imprints, or other methods that are based on aggregation. The article discusses methods for designing multi-stage cascade, usually counter-current. At every stage of this cascade, relevant aggregates are retained by the membrane, while the permeate passes freely through membrane. The process takes place in the membrane boundary layer with a local cross-flow of the permeate and the retentate. So the whole system can be called a cross-counter-current. The process kinetics “k” must be coordinated with the permeate flux “J” and the rate of surface renewal of the sorbent on the membrane surface, s. This can be done by using ordinary back-flushing or relevant hydrodynamic method of sweeping, such as: turbulences, shear stresses or lifting forces. A surface renewal model has been applied to adjust the optimal process conditions to sorbent kinetics. The experimental results confirmed the correctness of the model and its suitability for design of the new type of contactors.
    Źródło:
    Chemical and Process Engineering; 2012, 33, 4; 573-583
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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