Naslov
Deep eutectic solvents for biodiesel purification in a microextractor: solvent preparation, selection and process optimization

Autori
Anđelović Sara ; Božinović, Marko ; Ćurić, Željka ; Šalić, Anita ; Jurinjak Tušek, Ana ; Zagajski Kučan, Kristina ; Rogošić, Marko ; Radović, Mia ; Cvjetko Bubalo, Marina ; Zelić, Bruno

Izvornik
Bioengineering (2306-5354) 9 (2022), 11; 665, 21

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

Ključne riječi
biodiesel ; DES ; microextractor ; purification ; glycerol extraction

Sažetak
The most important and commonly used process for biodiesel synthesis is transesterification. The main by-product of biodiesel synthesis by transesterification is glycerol, which must be removed from the final product. Recently, deep eutectic solvent (DES) assisted extraction has been shown to be an effective and sustainable method for biodiesel purification. In this study, biodiesel was produced by lipase-catalysed transesterification from sunflower oil and methanol. A total of 12 different eutectic solvents were prepared and their physical properties were determined. Mathe-matical models were used to define which physical and chemical properties of DES and to what extent affect the efficiency of extraction of glycerol from the biodiesel. After initial screening, cholinium- based DES with ethylene glycol as hydrogen bond donor was selected and used for optimization of extraction process conditions performed in a microsystem. To determine the optimal process conditions (temperature, biodiesel:DES volume ratio, residence time), the experimental three- level-three-factor Box-Behnken experimental design was used. In the end, a combination of a mathematical model and experimental results was used to estimate how many micro-extractors are necessary for the complete removal of glycerol.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti, Biotehnologija

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