Wszystkie pola: test reactions - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Test Reactions To Study Efficiency Of Mixing
Autorzy:: Jasińska, M.
Powiązania:: https://bibliotekanauki.pl/articles/185281.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: micromixing
efficiency of mixing
IEM model
engulfment model
chemical test
reactions
mikromieszanie
wydajność mieszania
model IEM
model zatopienia
test chemiczny
Opis:: Effects of mixing on the course of fast chemical reactions are relatively well understood, especially in homogeneous systems. This enables to design and operate chemical reactors with the goal to achieve a high yield of a desired product and use systems of complex reactions as a chemical probe (chemical test reactions) to identify progress of mixing and quality of mixture. Recently, a number of studies have focused on the application of chemical test reactions to identify energy efficiency of mixing, being a convenient way of comparing mixers and reactors in terms of their mixing efficiency. This review offers a presentation of chemical test reactions available in the literature and methods of applications of test reactions to identify the energy efficiency of mixing. Also methods to assess the extent of micromixing by measuring product distribution or segregation index, and to determine the time constant for mixing are presented for single phase homogeneous systems and two-phase liquid-liquid systems.
Źródło:: Chemical and Process Engineering; 2015, 36, 2; 171-208
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Application of new chemical test reactions to study mass transfer from shrinking droplets and micromixing in the rotor-stator mixer
Autorzy:: Bałdyga, J.
Kotowicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/184911.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: efficiency of mixing
mass transfer
micromixing
rotor-stator mixer
test reaction
wydajność mieszania
transfer masy
mikromieszanie
reakcja testowa
Opis:: A pair of fast competitive reactions, neutralization and 2,2-dimetoxypropane (DMP) hydrolysis, has been applied do study mass transfer and micromixing in a T 50 Ultra-Turrax® - IKA rotor-stator device. In experiments the dispersed organic phase containing p-Toluenesulfonic acid (pTsOH) dissolved in diisopropyl ether, whereas the continuous phase was represented by the aqueous solution of sodium hydroxide, 2,2-dimetoxypropane (DMP) and ethanol. During mixing a fast mass transfer of a solute (pTsOH) from organic phase droplets, which were shrinking due to fast dissolution of the organic solvent, was followed by micromixing and chemical reactions in the continuous phase. Measured hydrolysis yields were applied to express effects of mixing on the course of chemical reactions. Modeling was based on application of models describing drop breakup, mass transfer in the liquid-liquid system and micromixing. Combined effects of mass transfer and drop breakage on drop population were expressed using the population balance equations. The model has been used to interpret experimental results, in particular to identify the efficiency of mixing.
Źródło:: Chemical and Process Engineering; 2017, 38, 3; 477-489
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Energetic efficiency of mass transfer accompanied by chemical reactions in liquid-liquid systems
Autorzy:: Jasińska, M.
Bałdyga, J.
Powiązania:: https://bibliotekanauki.pl/articles/185369.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: chemical test reactions
energetic efficiency of mixing
mass transfer\liquid-liquid
system
rotor-stator mixer
chemiczne reakcje testowe
efektywność energetyczna mieszania
przeniesienie masy
ciecz
Opis:: Energetic efficiency depicting the fraction of energy dissipation rate used to perform processes of drop breakup and mass transfer in two-phase, liquid-liquid systems is considered. Results of experiments carried out earlier in two types of high-shear mixers: an in-line rotor-stator mixer and a batch rotor-stator mixer, have been applied to identify and compare the efficiency of drop breakage and mass transfer in both types of mixers. The applied method is based on experimental determination of both: the product distribution of chemical test reactions and the drop size distributions. Experimental data are interpreted using a multifractal model of turbulence for drop breakage and the model by Favelukis and Lavrenteva for mass transfer. Results show that the energetic efficiency of the in-line mixer is higher than that of the batch mixer; two stator geometries were considered in the case of the batch mixer and the energetic efficiency of the device equipped with a standard emulsor screen (SES) was higher than the efficiency of the mixer equipped with a general purpose disintegrating head (GPDH) for drop breakup but smaller for mass transfer.
Źródło:: Chemical and Process Engineering; 2017, 38, 3; 433-444
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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