Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 905174

Effect of Impeller Off-bottom Clearance on Crystal Growth Kinetics of Borax in Dual-impeller Batch Cooling Crystallizer


Kaćunić, Antonija; Ćosić, Marija; Rušić, Davor; Kuzmanić, Nenad
Effect of Impeller Off-bottom Clearance on Crystal Growth Kinetics of Borax in Dual-impeller Batch Cooling Crystallizer // Chemical Engineering Transactions, 57 (2017), 787-792 doi:10.3303/CET1757132 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 905174 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Effect of Impeller Off-bottom Clearance on Crystal Growth Kinetics of Borax in Dual-impeller Batch Cooling Crystallizer

Autori
Kaćunić, Antonija ; Ćosić, Marija ; Rušić, Davor ; Kuzmanić, Nenad

Izvornik
Chemical Engineering Transactions (2283-9216) 57 (2017); 787-792

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
crystallization, PBT dual impeller, crystal growth kinetics

Sažetak
The aim of this work was to experimentally investigate the influence of impeller off-bottom clearance on crystal growth kinetics of disodium tetraborate decahydrate (borax) in a dual-impeller batch cooling crystallizer. Examinations were carried out in a crystallizer of 15 dm3 with liquid height to crystallizer diameter ratio (H/dT) of 1.3. In this research, two pitched blade turbines (PBT) with diameter D/dT=0.33, were mounted on the same shaft with a constant spacing between impellers (s/D=1.0). Mixing was performed at the impeller speed which ensured the state of complete suspension in the system (N=NJS). The impeller off-bottom clearance (C/D) was varied from 0.2 to 1.3. Crystallization was carried out by a controlled cooling of the solution saturated at 30°C. Concentration of the solution was measured in line by potentiometric method, while the changes of crystal size over time were determined by optical microscope and image analysis software. Experimental results indicate that impeller off-bottom clearance influences the change of crystal size over process time. But, regardless of the impeller off-bottom clearance, crystal growth is integration limited. The value of an order of crystal growth rate changes insignificantly with C/D ratio, while the crystal growth rate constant is affected by the change in hydrodynamics. Obtained results are a consequence of the hydrodynamic conditions in the dual-impeller crystallizer. In order to analyze the overall fluid flow pattern, in which an interaction of the flows generated by each of the impellers occurred, photographs of the flows were taken and simulations by VisiMix 2000 Turbulent were made. Taking into account the values of kinetic parameters of crystal growth, characteristic of obtained crystals, power consumption and the overall fluid flow pattern, it is possible to define the impact of impeller off-bottom clearance on borax crystal growth kinetics.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo



POVEZANOST RADA


Ustanove
Kemijsko-tehnološki fakultet, Split

Profili:

Avatar Url Nenad Kuzmanić (autor)

Avatar Url Davor Rušić (autor)

Avatar Url Antonija Čelan (autor)

Avatar Url Marija Ćosić (autor)

Citiraj ovu publikaciju

Kaćunić, Antonija; Ćosić, Marija; Rušić, Davor; Kuzmanić, Nenad
Effect of Impeller Off-bottom Clearance on Crystal Growth Kinetics of Borax in Dual-impeller Batch Cooling Crystallizer // Chemical Engineering Transactions, 57 (2017), 787-792 doi:10.3303/CET1757132 (međunarodna recenzija, članak, znanstveni)
Kaćunić, A., Ćosić, M., Rušić, D. & Kuzmanić, N. (2017) Effect of Impeller Off-bottom Clearance on Crystal Growth Kinetics of Borax in Dual-impeller Batch Cooling Crystallizer. Chemical Engineering Transactions, 57, 787-792 doi:10.3303/CET1757132.
@article{article, year = {2017}, pages = {787-792}, DOI = {10.3303/CET1757132}, keywords = {crystallization, PBT dual impeller, crystal growth kinetics}, journal = {Chemical Engineering Transactions}, doi = {10.3303/CET1757132}, volume = {57}, issn = {2283-9216}, title = {Effect of Impeller Off-bottom Clearance on Crystal Growth Kinetics of Borax in Dual-impeller Batch Cooling Crystallizer}, keyword = {crystallization, PBT dual impeller, crystal growth kinetics} }

Časopis indeksira:


  • Scopus


Citati