Kinetics of free fatty acids esterification with methanol in the production of biodiesel fuel

摘要: The aim of this study was the determination optimal conditions free fatty acid esterification by methanol using catalyst, and calculation kinetic parameters process. It found that reaction rate depends on amount catalyst acidity mixture. changes also depending duration, especially during first 15 min. Establishing above mentioned proved effect agents rate. Such dependence is characteristic to many heterogeneous processes. data suggest having excluded diffusion, order about 1. Within limits experimental (free acids 0.162 mol//L-1.948 mol/L, temperature 20–60 °C, constant mixing speed –850 min-1, 1% (H2SO4)) apparent energy activation Et ≈ 13.3 kJ/mol, while pre-exponent A = 1.27. These allow assumption diffusion restrictions are entire range concentrations duration studied.