SUPERCRITICAL CARBON DIOXIDE SYSTEM Supercritical carbon dioxide system has application of extraction, drying, making nanoparticle, expansion, de-binding, etc.
Supercritical Fluid Dyeing
Supercritical Foam
Extraction & Degreasing (Corn Embryo) Raw material
Rapid Pressure Drop Gas injection
Mixing, Diffusion
Thermal dynamic instability
Two-phase polymer/CO2
Single-phase polymer/CO2 solution
After extraction
Conventional Wet Dyeing Process Dry
Two system
Before extraction
Textile
Foam Composite
Water
Additive
Water
Productant
Wet dyer
Rinsing
Colored Wasterwater
Wastewater
Air
Supercritical CO2 extraction
Grinding
Energy
Drying
Product 40
Polypropylene
Heat, Air Pollutant
Liquid
Extraction Rate(%)
SCF Dyeing Process Gas
SCF Textile
SCF Dyer
Textile
No Wastewater
Nozzle
400 bar 300 bar 200 bar
0 0
50
Supercritical Flud Chromatography
200
250
Water, methanol, LiCI solution
Pump
Synthesis of Biodiesel (Supercritical MeOH) No byproducts No washing No drying
Supercritical process 350℃, 400atm, few min
Resin packed column Solvent pump
R1COOCH2
Solution
R1COOCH3 +
R2COOCH
3CH3OH
CO2 Gas
CH2OH +
R2COOCH3
R3COOCH2
Cyclona separator
Alkall catalyst process 65℃, 1.5atm, few hours
Methanol
CHOH
R3COOCH3
CH2OH
Methyl Ester
Glycerin
Vessel
CO2 cylinder
CO2 pump
Back-pressure controller
Thermostat bath
Filtering Vessel
Water
100
OCH2-CHCH2NHCH(CH3)2
(111)
CeO2
OH
40
60
80
2θ (degree)
Wastewater
100
Supercritical Process
Supercritical Process
80
80 Alkaline-catalyzed
60 40 20
60 Alkaline-catalyzed
40 20 Alkaline-catalyzed
Acid-catalyzed
(301) (420)
(222)
(311)
pindolol (400)
(200)
(220)
Intensity(arb.unit)
20
Supercritical CO2 LC Methyl esters(%)
Conventional LC
H N
Soap
Saponification reaction
Fraction collector
Methyl esters(%)
CO2 Cylinder
150
100 Time(min)
Synthesis of Nanoparticles Heater
500 bar 20
10
Ref. Korea Patent No. 10-0719487
Pump
30
0
0
2
4
6
0
0
10
Water content(%) 0
20
40
60
80
100
120
0
2.5
5
7.5
10
12.5
15
17.5
20
30
400
Free fatty acids content(%)
min
Minutes
Water 372℃, 221bar Propane 97℃ , 42.5bar
Supercritical condition depending on solvent Butane
133℃ , 11bar
152℃ , 38bar
Critical Point Liquid Phase
Supercritical carbon dioxide
Ammonia
Solid Phase
Separation
Inflammable gas
Pressure
Ethanol 241℃ , 61bar
Supercritical Fluid
Low Non-toxic temperature
Gaseous Phase Temperature
Coexistence with gas and liquid
increasing wake-density Supercritical Fluid decreasing liquefied-density
Carbon dioxide 31℃ , 74bar
255, Techno 2-ro, Yuseong-gu, Daejeon, Korea (Daedeok techno valley)
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