SUPERCRITICAL FLUID
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seminar surveyer
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#1
22-12-2010, 12:33 PM


Prepared by:
Biswarup Mondal


.ppt   bm seminar.ppt (Size: 140.5 KB / Downloads: 259)

INTRODUCTION
Definition: Supercritical Fluid is any substance at a temperature and pressure above its Critical point.
Example: Commonly used Supercritical fluids are CO2 & H2O.
Phase Diagram:

INDEX
Introduction
Properties Of SCF
Applications
Applications ------Extraction
Applications ------Nano Particle Synthesis
Natural Occurrence
Conclusion


PROPERTIES OF SCF
SCF can penetrate solids like gas.
It dissolves materials like liquid.
There is no Surface Tension in SCF.
It has a very good solvent property.
In supercritical environment only one phase exists.
INDEX
Introduction
Properties Of SCF
Applications
Applications ------Extraction
Applications ------Nano Particle Synthesis
Natural Occurrence
Conclusion


APPLICATIONS
Extraction by SCF
Nano-particle Synthesis
Dry- cleaning
Chemical Reaction
Bio-diesel production
Supercritical water power generation
INDEX
Introduction
Properties Of SCF
Applications
Applications ------Extraction
Applications ------Nano Particle Synthesis
Natural Occurrence
Conclusion


APPLICATIONS ------EXTRACTION
Basic procedure:
Partition volatile substances by contacting Supercritical Fluid with feed material.
Soluble material dissolve into the Supercritical Fluid.
The extracted component then separated by changing pressure & temperature.
Finally the SCF recompressed & recycled.


APPLICATIONS ------EXTRACTION
Advantages:
It is relatively rapid for low viscosity & high diffusivity of SCF
Easily recoverable.
Non-toxic solvents leave no harmful residue.
High boiling components are extracted at relatively low temp.
Uses:
IT is largely used in Food & Flavouring industry.
This method is used for Decaffenication of tea & coffee.
Extraction of essential oils, aroma materials from spices etc.

INDEX
Introduction
Properties Of SCF
Applications
Applications ------Extraction
Applications----- Nano Particle Synthesis
Natural Occurrence
Conclusion


APPLICATIONS ---- NANO-PARTICLE SYNTHESIS
Supercritical Fluid Precipitation technology produces particles with Nano-dimension.
This technique is largely used in Pharmaceutical industry
INDEX
Introduction
Properties Of SCF
Applications
Applications ------Extraction
Applications ------Nano Particle Synthesis
Natural Occurrence
Conclusion


NATURAL OCCURRENCE
Submarine -Volcanoes: Steam & gases which are releases from the volcanoes are in high pressure (for sea depth) & temperature.


Planetary –atmosphere: Many planets atmosphere is Supercritical environment for some fluid. Like –Venus, Jupiter etc.
INDEX
Introduction
Properties Of SCF
Applications
Applications ------Extraction
Applications ------Nano Particle Synthesis
Natural Occurrence
Conclusion


CONCLUSION
Drawbacks:-
The system maintain in high pressure.
It is a complex process.

Future:-
It has a great future in upcoming days we will discover many others uses of this technology by
our research.




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Sunilmestri
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#2
05-05-2011, 05:48 AM

I want full seminar and presentation report on supercritical fluid
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