Study of effects of some reaction conditions on ethanolysis of rapeseed oil with dispergation

Abstract

The alkaline-catalyzed (KOH) ethanolysis of rapeseed oil with the help of a mechanical disperser was researched in this study. The effects of chosen reaction conditions (independent variables: the reaction temperature and time, the amount of catalyst, the molar ratio ethanol to oil and the rotation frequency of the disperser) on the ethanolysis process and ways for the improvement of the transesterification and separation process were studied. The transesterification of oil, the separation of the ester phase from the glycerol phase and qualitative properties of the ester phase were monitored by many dependent variables (e.g. the yield of the ester phase, the weight concentration of glycerides, the content of potassium ions etc). The measured data was analyzed by multi-linear regression with the help of many statistical tests (significance of parameters, exclusion of outliers etc.). The created mathematical models describing the relations between the independent and dependent variables were verified by several independent experiments.

The Catalysed Transformation of Vegetable Oils or Animal Fats to Biofuels and Bio-Lubricants: A Review

“…The second most frequently used alcohol is ethanol, especially for homogeneous catalysts. Ethanol can be easy to produce from renewable sources, and transesterification usually processes at a lower temperature (25-30 • C) because, at a higher temperature, saponification is easily processed [55][56][57]. The higher number of carbons in the alcohol chain means lower reactivity but a higher boiling point-that is, under the same pressure, the transesterification could be carried out at higher temperatures.…”

Butanol as a co-solvent for transesterification of rapeseed oil by methanol under homogeneous and heterogeneous catalyst

“…Firstly, the transesterification with ethanol and butanol together was carried out at 25 °C, at molar ratio O:E:B 1:7:3.5 and 1 wt% of catalyst (KOH) to oil. The lower temperature (25 °C) was chosen, because the undesired oil saponification proceeds less than at 60 °C [23]. The molar ratio of reaction components was based on ternary plot (Fig.…”

Comparison of Power-Ecological Characteristics of Diesel Engine Work on Mixed Diesel Fuels on the Basis of Ethyl Esters of Rapeseed and Sunflower Oils

“…However, its use is more energy intensive due to more complex separation of products [4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”