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Wyszukujesz frazę "Sobieszuk, P." wg kryterium: Autor


Wyświetlanie 1-8 z 8
Tytuł:
Investigations of mass transfer in annular gas-liquid flow in a microreactor
Autorzy:
Sobieszuk, P.
Napieralska, K.
Powiązania:
https://bibliotekanauki.pl/articles/185266.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mass transfer
annular flow
microreactor
masa transferu
przepływ pierścieniowy
mikroreaktor
Opis:
The paper presents an investigation of mass transfer in gas-liquid annular flow in a microreactor. The microreactor had a meandered shape with a square cross-section of the channel (292×292 μm, hydraulic diameter 292 μm) and 250 mm in length. The rate of CO2 absorption from the CO2/N2 mixture in NaOH (0.1 M, 0.2 M, 0.7 M, 1.0 M and 1.5 M) water solutions was measured. Two velocities of gas flow and two velocities of liquid flow were used. In two cases a fully developed annular flow at the beginning of the channel was observed, whilst in two cases annular flow was formed only in about 2/3 of the microchannel length. Based on the measurements of CO2 absorption rate, the values of volumetric liquid – side mass transfer coefficients with the chemical reaction were determined. Then physical values of coefficients were found. Obtained results were discussed and their values were compared with the values predicted by literature correlations.
Źródło:
Chemical and Process Engineering; 2016, 37, 1; 55-64
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absorption of CO2 into perfluorinated gas carrier in the Taylor gas–liquid flow in a microchannel system
Autorzy:
Sobieszuk, P.
Pilarek, M.
Powiązania:
https://bibliotekanauki.pl/articles/185397.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
perfluorodecalin (PFD)
liquid gas carrier
solubility
Taylor flow
microreactor
perfluorodekalina (PFD)
gaz ciekły
rozpuszczalność
przepływ Taylora
mikroreaktor
Opis:
The aim of this study was to determine the solubility of CO2 in perfluorodecalin (PFD) which is frequently used as efficient liquid carrier of respiratory gases in bioprocess engineering. The application of perfluorinated liquid in a microsystem has been presented. Gas-liquid mass transfer during Taylor (slug) flow in a microchannel of circular cross section 0.4 mm in diameter has been investigated. A physicochemical system of the absorption of CO2 from the CO2/N2 mixture in perfluorodecalin has been applied. The Henry’s law constants have been found according to two theoretical approaches: physical (H = 1.22x10-3 mol/m3Pa) or chemical (H = 1.26x10-3 mol/m3Pa) absorption. We are hypothesising that the gas-liquid microchannel system is applicable to determine the solubility of respiratory gases in perfluorinated liquids.
Źródło:
Chemical and Process Engineering; 2012, 33, 4; 595-602
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of liquid flowrate on size of nanobubbles generated by porous-membrane modules
Autorzy:
Ulatowski, K.
Sobieszuk, P.
Powiązania:
https://bibliotekanauki.pl/articles/185184.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nanobubbles
porous membranes
size distribution
membrana porowata
rozkład wielkości
Opis:
The aim of this work was to investigate the influence of distilled water flowrate in two different porousmembrane modules on the size of generated nitrogen nanobubbles. Modules had different diameter and number of membrane tubes inside the module. As bubbles are cut off from the membrane surface by a shear stress induced by the liquid flow, the change in the linear liquid velocity should result in a change of the generated bubble diameter. For both modules, higher flowrate of liquid induced generation of smaller bubbles, which was consistent with our expectations. This effect can help us in generation of bubbles of desired size.
Źródło:
Chemical and Process Engineering; 2018, 39, 3; 335--345
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pressure drop in two-phase gas-liquid (Taylor) flow in microreactors
Autorzy:
Cygański, P.
Sobieszuk, P.
Pohorecki, R.
Powiązania:
https://bibliotekanauki.pl/articles/185780.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
przepływ Taylora
przepływ gaz-ciecz
spadek ciśnienia
mikroreaktor
gas-liquid Taylor flow
microreactor
pressure drop
Opis:
The pressure drop in microreactors for the gas - liquid Taylor flow was measured for 4 different microreactor geometries and 3 different gas - liquid systems. The results have been compared with the existing literature correlations. A selection of the best correlations has been made.
Źródło:
Chemical and Process Engineering; 2012, 33, 3; 369-384
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contribution of liquid-and gas-side mass transfer coefficients to overall mass transfer coefficient in Taylor flow in a microreactor
Autorzy:
Sobieszuk, P.
Ilnicki, F.
Pohorecki, R.
Powiązania:
https://bibliotekanauki.pl/articles/185639.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Taylor flow
mass transfer coefficients
microreactor
CFD simulations
przepływ Taylora
współczynnik przenikania masy
mikroreaktor
symulacje CFD
Opis:
Gas-liquid microreactors find an increasing range of applications both in production, and for chemical analysis. The most often employed flow regime in these microreactors is Taylor flow. The rate of absorption of gases in liquids depends on gas-side and liquid-side resistances. There are several publications about liquid-side mass transfer coefficients in Taylor flow, but the data about gas-side mass transfer coefficients are practically non existent. We analysed the problem of gas-side mass transfer resistance in Taylor flow and determined conditions, in which it may influence the overall mass transfer rate. Investigations were performed using numerical simulations. The influence of the gas diffusivity, gas viscosity, channel diameter, bubble length and gas bubble velocity has been determined. It was found that in some case the mass transfer resistances in both phases are comparable and the gas-side resistance may be significant. In such cases, neglecting the gas-side coefficient may lead to errors in the experimental data interpretation.
Źródło:
Chemical and Process Engineering; 2014, 35, 1; 35-45
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Harvesting energy and hydrogen from microbes
Autorzy:
Sobieszuk, P.
Zamojska-Jaroszewicz, A.
Kołtuniewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/185762.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
clean energy
microbial fuel cell
microbial electrolysis cell
hydrogen
czysta energia
mikrobiologiczne ogniwo paliwowe
elektroliza komórek drobnoustrojów
wodór
Opis:
This article presents a critical mini-review of research conducted on bioelectrochemical reactors with emphasis placed on microbial fuel cells (MFC) and microbial electrolysis cells (MEC). The principle of operation and typical constructions of MFCs and MECs were presented. The types of anodes and cathodes, ion-selective membranes and microorganisms used were discussed along with their limitations.
Źródło:
Chemical and Process Engineering; 2012, 33, 4; 603-610
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of hydroxyapatite in a continuous reactor : a review
Autorzy:
Latocha, J.
Wojasiński, M.
Sobieszuk, P.
Ciach, T.
Powiązania:
https://bibliotekanauki.pl/articles/185159.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydroxyapatite
synthesis in continuous reactor
continuous precipitation
microparticles
nanoparticles
hydroksyapatyt
synteza w reaktorze ciągłym
ciągłe opady
mikrocząsteczki
nanocząsteczki
Opis:
Because of excellent properties, similar to natural bone minerals, and variety of possible biomedical applications, hydroxyapatite (HAp) is a valuable compound among the calcium phosphate salts. A number of synthesis routes for producing HAp powders have been reported. Despite this fact, it is important to develop new methods providing precise control over the reaction and having potential to scale-up. The main motivation for the current paper is a view of continuous synthesis methods toward medical application of produced hydroxyapatite, especially in the form of nanoparticles.
Źródło:
Chemical and Process Engineering; 2018, 39, 3; 281--293
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements of Hydrogen Solubility in Nitrobenzene/Aniline Mixtures
Autorzy:
Srebniak, A.
Sobieszuk, P.
Kraut, M.
Görke, O.
Powiązania:
https://bibliotekanauki.pl/articles/185556.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solubility
Henry’s constant
hydrogenation
rozpuszczalność
Stała Henry'ego
uwodornienie
Opis:
Measurements of hydrogen solubility in various nitrobenzene-aniline mixtures were conducted in an autoclave reactor with a stirrer and control of temperature. The solubility of hydrogen was measured at 7 different values of temperature (30 °C, 40 °C, 50 °C, 90 °C, 130 °C, 170 °C, 210 °C, respectively), 3 values of stirrer rotation speed (1200 rpm, 1600 rpm, 2000 rpm, respectively) and a range of pressure of 20 ‒ 30 bar. Moreover, pure aniline, pure nitrobenzene and their mixtures with different concentrations were used. In the next step, values of Henry’s constant were calculated. Based on experimental data a dependence of Henry’s constant on temperature for pure aniline and pure nitrobenzene was proposed. Additionally, for each temperature correlations between Henry’s constant and aniline’s concentration in mixture of nitrobenzene-aniline were found.
Źródło:
Chemical and Process Engineering; 2017, 38, 2; 241-248
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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