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    Wyświetlanie 1-4 z 4
    Tytuł:
    Optical Emission Spectroscopy of Microwave (915 MHz) Plasma in Atmospheric Pressure Nitrogen with Addition of Ethanol Vapour
    Autorzy:
    Miotk, R.
    Jasiński, M.
    Mizeraczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1366270.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.50.Sw
    52.70.Kz
    Opis:
    In this paper results of optical emission spectroscopic study of microwave 915 MHz plasma in atmospheric pressure nitrogen with an addition of ethanol vapour are presented. The plasma was generated in waveguide-supplied cylinder-type nozzleless microwave plasma source. The aim of research was to determine the rotational $T_{rot}$ and vibrational $T_{vib}$ temperatures of CN and $C_2$. A method called bubbling was employed to introduce alcohol (ethanol) into the plasma. The $T_{rot}$ and $T_{vib}$ were determined by comparing the measured and simulated spectra. Obtained rotational and vibrational temperatures of CN and $C_2$ were ranged from 4400 to 5400 K and from 2800 to 3400 K, respectively, depending on the location in the plasma and the microwave absorbed power $P_{A}$.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1329-1331
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microwave plasma for hydrogen production from liquids
    Autorzy:
    Czylkowski, D.
    Hrycak, B.
    Miotk, R.
    Jasiński, M.
    Mizeraczyk, J.
    Dors, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/148564.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dry reforming
    ethanol
    hydrogen production
    isopropanol
    kerosene
    microwave plasma
    Opis:
    The hydrogen production by conversion of liquid compounds containing hydrogen was investigated experimentally. The waveguide-supplied metal cylinder-based microwave plasma source (MPS) operated at frequency of 915 MHz at atmospheric pressure was used. The decomposition of ethanol, isopropanol and kerosene was performed employing plasma dry reforming process. The liquid was introduced into the plasma in the form of vapour. The amount of vapour ranged from 0.4 to 2.4 kg/h. Carbon dioxide with the fl ow rate ranged from 1200 to 2700 NL/h was used as a working gas. The absorbed microwave power was up to 6 kW. The effect of absorbed microwave power, liquid composition, liquid fl ow rate and working gas fl ow rate was analysed. All these parameters have a clear infl uence on the hydrogen production effi ciency, which was described with such parameters as the hydrogen production rate [NL(H2)/h] and the energy yield of hydrogen production [NL(H2)/kWh]. The best achieved experimental results showed that the hydrogen production rate was up to 1116 NL(H2)/h and the energy yield was 223 NL(H2) per kWh of absorbed microwave energy. The results were obtained in the case of isopropanol dry reforming. The presented catalyst-free microwave plasma method can be adapted for hydrogen production not only from ethanol, isopropanol and kerosene, but also from different other liquid compounds containing hydrogen, like gasoline, heavy oils and biofuels.
    Źródło:
    Nukleonika; 2016, 61, 2; 185-190
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A critical review and reinterpretation of bio-, litho- and seismostratigraphic data of the Southern Baltic deposits
    Autorzy:
    Zachowicz, J.
    Miotk-Szpiganowicz, G.
    Kramarska, R.
    Uścinowicz, Sz.
    Przedziecki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1204982.pdf
    Data publikacji:
    2008
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    pollen and diatoms diagrams
    14C datings
    bio- litho- and seismostratigraphy
    Late Pleistocene
    Holocene
    southern Baltic Sea
    Opis:
    The aim of this study was the reinterpretation of the published and unpublished Late-Pleistocene and Holocene pollen and diatom diagrams of deposits from the sedimentary basins of the Southern Baltic Sea and the correlation of the distinguished biostratigraphic units with lithological parameters, seismostratigraphic units. Chronostratigraphic subdivision of the Late Pleistocene and Holocene was also made. To facilitate the correlation and reinterpretation of the results of biostratigraphic (palynological and diatom) analyses, new unified and simplified diagrams were drawn using the POLPAL software. Such diagrams were constructed for all the sites under comparison, even for those of no numerical data. In such cases, the published diagrams were scanned and their percentage values were the basis for new diagrams. A review and reinterpretation of biostratigraphic data show an almost complete lack of palynological documentation and diatom diagrams for the Late Pleistocene period and poor documentation for the Early Holocene. Middle and Late Holocene Baltic muds have the best biostratigraphic documentation and radiocarbon dating, which greatly facilitates their location on the geological time scale. Among the Southern Baltic postglacial sediments three lithostratigraphic units were identified. They differ in their lithological features reflecting the conditions prevalent in the sedimentary basin during deposition. It should be noted that these units meet no formal criteria for distinguishing lithostratigraphic units. Similarly, within the Late Pleistocene and Holocene sediments of Southern Baltic deep-water basins, three main seismostratigraphic complexes have been identified. The integrated analysis of seismoacoustic profiles, lithological profiles of cores and reinterpretated biostratigraphic data allow a correlation of the bio-, litho- and seismostratigraphic units with chronostratigraphic units and Baltic evolutionary phases.
    Źródło:
    Polish Geological Institute Special Papers; 2008, 23; 117-138
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palaeogeographical significance of the Eemian biogenic sediments at Bór site (Warta River valley, Central Poland)
    Autorzy:
    Petera-Zganiacz, J.
    Borówka, R.K.
    Forysiak, J.
    Miotk-Szpiganowicz, G.
    Pawłowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060307.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    gyttja
    palynology
    cladocera
    geochemistry
    Warta River valley deposits
    Opis:
    An investigated area is located in the middle reach of the WartaRiver valley. During drillings in the Bór site organic deposits such as detritous calcareous gyttja and calcareous detritous gyttja has been documented in a depth between 14,9 and 16,6 m. The organic deposits are covered by mineral, mostly sandy deposits. The accumulation took place in the small lake formed as an abandoned channel. Palynological analysis led to conclusion that biogenic accumulation began at the end of Wartanian and took place at least to the Eemian Interglacial optimum. Results of palynological, Cladocera and geochemical analysis inform about water level changes and increasing of trophy status of the reservoir. Presence of Mesozoic substratum very close to the palaeolake bottom influenced significantly chemical features of the organic deposits. As Eemian organic deposits are uncommon in the Warta River valley, the Bór site seems important for palaeogeographical reconstructions of the Warta River valley during Eemian Interglacial.
    Źródło:
    Geological Quarterly; 2013, 57, 4; 687--700
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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