Temat: supercritical fluid - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Enhancement of supercritical fluid extraction in membrane cleaning process by addition of organic solvents
Autorzy:: Krzysztoforski, J.
Krasiński, A.
Henczka, M.
Piątkiewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/185233.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: supercritical fluid
extraction
porous membrane
TIPS
płyn nadkrytyczny
wydobycie
membrana porowata
Opis:: In this study, the process of membrane cleaning by supercritical fluid extraction was investigated. Polypropylene microfiltration membranes, contaminated with oils, were treated in a batch process with a supercritical fluid (SCF). As extractant, pure supercritical carbon dioxide or supercritical carbon dioxide with admixtures of methanol, ethanol and isopropanol were used. Single-stage and multi-stage extraction was carried out and process efficiency was determined. The obtained results showed that addition of organic solvents significantly enhances the cleaning performance, which increases with increase of organic solvent concentration and decreases with increasing temperature. All three solvents showed a comparable effect of efficiency enhancement. The results confirmed that supercritical fluid extraction can be applied for polypropylene membrane cleaning.
Źródło:: Chemical and Process Engineering; 2013, 34, 3; 403-414
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The effect of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical fluids – A pore network study
Autorzy:: Krzysztoforski, Jan
Khayrat, Karim
Henczka, Marek
Jenny, Patrick
Powiązania:: https://bibliotekanauki.pl/articles/2086809.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: porous material
supercritical fluid
mathematical modelling
cleaning
capillary pumping
materiał porowaty
płyn nadkrytyczny
modelowanie matematyczne
czyszczenie
pompowanie kapilarne
Opis:: The role of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical fluids was investigated numerically. As a specific process to be modelled, cleaning of porous membranes, contaminated with soybean oil, using supercritical carbon dioxide as the cleaning fluid (solvent) was considered. A 3D pore-network model, developed as an extension of a 2D drying model, was used for performing pore scale simulations. The influence of various process parameters, including the coordination number of the pore network, the computational domain size, and the external flow mass transfer resistance, on the strength of the capillary pumping effect was investigated. The capillary pumping effect increases with increasing domain size and decreasing external flow mass transfer resistance. For low coordination numbers of the pore network, the capillary pumping effect is not noticeable at macro scale, while for high coordination numbers, the opposite trend is observed – capillary pumping may influence the process at macro scale. In the investigated system, the coordination number of the pore network seems to be low, as no capillary pumping effects were observed at macro scale during experimental investigation and macro-scale modelling of the membrane cleaning process.
Źródło:: Chemical and Process Engineering; 2021, 42, 4; 349--368
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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