Pregled bibliografske jedinice broj: 1184319
IMPROVEMENT OF GRANULOMETRIC PROPERTIES OF CRYSTALS BY CONSTANT SUPERSATURATION FEEDBACK CONTROL
IMPROVEMENT OF GRANULOMETRIC PROPERTIES OF CRYSTALS BY CONSTANT SUPERSATURATION FEEDBACK CONTROL // XIV. SUSRET MLADIH KEMIJSKIH INŽENJERA KNJIGA SAŽETAKA / Žižek, Krunoslav ; Katančić, Zvonimir ; Kovačić, Marin (ur.).
Zagreb: Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2022. str. 29-29 (predavanje, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 1184319 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
IMPROVEMENT OF GRANULOMETRIC PROPERTIES OF CRYSTALS
BY CONSTANT SUPERSATURATION FEEDBACK CONTROL
Autori
Sacher, Josip ; Gavran, Matea ; Bolf, Nenad ; Ujević Andrijić, Željka
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
XIV. SUSRET MLADIH KEMIJSKIH INŽENJERA KNJIGA SAŽETAKA
/ Žižek, Krunoslav ; Katančić, Zvonimir ; Kovačić, Marin - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2022, 29-29
Skup
XIV. susret mladih kemijskih inženjera (SMLKI 2022)
Mjesto i datum
Zagreb, Hrvatska, 24.02.2022. - 25.02.2022
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
crystallization ; population balance modeling ; constant supersaturation control
Sažetak
The aim of this work was to investigate different control policies of the batch cooling crystallizer on the granulometric properties of obtained crystals. The study was conducted by computer simulation using population balance modeling in Simulink [1]. The Population balance was solved using the conservation element/solution element (CESE) method and consequently the dynamic evolution of crystal size distribution was obtained. The system under study consisted of 1 liter batch crystallizer with water as solvent and potassium nitrate as solute. The cooling system was not modeled because of the slow nature of the crystallization process and almost instant reaction of thermostat in real life application. The crystallizer was cooled from 32 °C to 20 °C with the starting concentration being saturation concentration at 32 °C. The crystallizer was seeded with 2 g of KNO3 and crystal size distribution of seeds was taken to be normal with mean 200 µm and standard deviation of 50 µm. Two temperature control policies were investigated, namely open loop linear cooling and closed loop (feedback) constant supersaturation control. For open loop linear cooling, different cooling rates were investigated and for the case of closed loop control, different supersaturations were investigated. The linear control policy had shorter operating time, but gave a significantly bigger ratio of nucleated crystals in the final product. Increasing the cooling rate resulted in a higher ratio of nucleated crystals which is considered to be a negative effect. On the other hand, constant supersaturation control had longer operating time, but resulted in a smaller ratio of nucleated crystals in the product. In conclusion, constant supersaturation feedback control is preferred because of improved granulometric properties of the product in comparison with linear open loop cooling policy.
Izvorni jezik
Engleski
Znanstvena područja
Kemijsko inženjerstvo
POVEZANOST RADA
Projekti:
EK-EFRR-KK.01.1.1.07.0017 - Napredno vođenje procesa kristalizacije (CrystAPC) (Bolf, Nenad, EK - KK.01.1.1.07) ( CroRIS)
Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb
Profili:
Željka Ujević Andrijić
(autor)
Nenad Bolf
(autor)
Matea Gavran
(autor)
Josip Sacher
(autor)