SUPER CRITICAL FLUID EXTRACTION

Presented by:NANDHU LAL A.M

KCAET, Tavanur.Kerala Agricultural

University

SUPERCRITICAL FLUID EXTRACTION

• process of separating one component (the extractant) from another (the matrix) using supercritical fluids as the extracting solvent.

• Novel technique

SUPERCRITICAL FLUID

• substance with a temperature and pressure above its critical point, where distinct liquid and gas phase do no exist.

• e.g.- ethylene, ammonia, toluene, carbon dioxide

Carbon dioxide-most commonly used SCF

• low critical parameters (31.1°C, 73.8 bar)

• low cost• Low density• Low viscosity• non-toxicity.• Abundant source• Eco friendly

APPARATUS

Storage vessel (liq.CO2)Extractor2 Separators

OPERATIONS

ADVANTAGES

Low critical parameters Non- hazardous solvents easily recoverable (due to its volatility) Non-toxic solvents leave no harmful

residue High boiling components are extracted at

relatively low temperatures Thermally labile compounds can be

extracted

DISADVANTAGES

Elevated pressure required Compression of solvent requires

elaborate recycling measures to reduce energy costs

High capital investment for equipment

APPLICATIONS

Decaffeination of coffeeExtraction of hops used in

the beer manufactureExtraction of oleoresins from

spices