Table 2.

Techniques to achieve high performance in the SFE process.

Sample	Performance enhancement technique	Results	Observation	References
Caryocar brasiliense	SFE + cold pressing	Can achieve an 8 times higher yield than that of SFE	Suitable for sample with higher lipid content	36
Clove buds	SFE + cold pressing + economic evaluation	Can obtain a 5 times higher yield extract than that of SFE	The cost of manufacturing (COM) for SFE + cold pressing is lower than that for the SFE system	37
Dipteryx alata	SFE + cold pressing + economic evaluation	Yield a higher yield by 31% over SFE	The cost of manufacturing (COM) for SFE + cold pressing is lower than that of the SFE system	38
Scrophularia striata Boiss	SFE + ultrasonic + economic evaluation	The performance of SFE was better with the ultrasonic treatment	The energy cost is lower when SFE is combined with ultrasonic treatments	41
Eugenia pyriformis	SFE + co-solvent + economic evaluation	An addition of up to 5% (w/w) of ethanol to SFE resulted in a higher yield	The production costs decrease when the SFE was added with a co-solvent	42
Capsicum frutescens	SFE + economic evaluation	SFE at a larger scale is better	COM was performed for three different scale of SFE	39
Rachig ring and glass beads	SFE + mathematical model + safety assessment	The valve opening needs to be control to produce an optimum depressurization	The mathematical model is used for simulations for the depressurization processes, which were involved with the temperature and pressure of SFE	43
Benzoic acid	SFE + economic analysis + safety assessment + mathematical model + artificial intelligence	–	The increase in pressure and temperature caused the economic and safety performance to decrease for SFE	44