Naslov
Guanidine catalysts for biodiesel production: Activity, process modelling and optimization

Autori
Racar, Marko ; Šoljić Jerbić, Ivana ; Glasovac, Zoran ; Jukić, Ante

Izvornik
Renewable energy (0960-1481) 202 (2023); 1046-1053

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

Ključne riječi
guanidine ; transesterification ; catalyst activity ; biodiesel ; optimization

Sažetak
Since conventional catalysts for biodiesel production have problems with saponification, ten guanidine derivatives were investigated in this study for their catalytic activity in the production of biodiesel from rapeseed oil and methanol. The most active catalyst was selected for process optimization. The influence of process parameters (reaction time, mass percent of catalyst and alcohol to oil ratio) on the transesterification process was evaluated using a design of experiments following a 33 factorial Box-Behnken design of experiments in conjunction with response surface methodology. An accurate quadratic model was developed (p-value < 0.001, F-value 65.90, R2 0.990) and used for process optimization. The resulting optimal conditions were 1.8 wt% of catalyst, methanol to oil ratio of 6.2:1, and a reaction time of 80 min with a predicted yield of 99.2 mol%. The optimal conditions were verified on a larger scale (1 kg), obtaining a yield of 96.5 mol%, confirming the accuracy of the quadratic model. In addition, the obtained biodiesel was characterized with respect to the main physicochemical and application properties.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA