In the mass transfer coefficient evaluation, the systems were
treated as pseudo-quaternary, that is, composed of ethanol, water,
a triacylglycerol equivalent to rice bran oil and a fatty acid equivalent
to commercial oleic acid for systems with refined rice oil or a
fatty acid equivalent to the free fatty acids present in crude or
degummed rice oil. This approach is based on the assumption that
the different triacylglycerols present in rice bran oil behave similarly
in the proposed liquid–liquid system. Thus, the rice bran oil
components can be replaced by a pseudo-compound with average
physicochemical properties. The same assumption is also valid for
free fatty acid mixtures. Lanza et al. [38] evaluated this approach
and demonstrated its accuracy