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SUPERCRITICAL FLUID


Posted by: seminar surveyer
Created at: Wednesday 22nd of December 2010 01:03:02 AM
Last Edited Or Replied at :Wednesday 04th of May 2011 07:18:50 PM
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uid 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 ..................[:=> Show Contents <=:]



thesis topics for control and instrumentation


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Created at: Monday 29th of October 2012 09:20:45 AM
Last Edited Or Replied at :Tuesday 30th of October 2012 05:27:05 AM
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Engineering.Pls i am in need of a project topic in instrumentation and control engineering in relationship with the oil and gas sector.Would like you to assist me with possible project topic on that topic and possible material.Here my [email protected] forward to hearing from you.tnks..................[:=> Show Contents <=:]



nanoparticle synthesis methods ppt


Posted by:
Created at: Monday 29th of October 2012 09:09:21 AM
Last Edited Or Replied at :Monday 29th of October 2012 09:09:21 AM
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i act..................[:=> Show Contents <=:]



biological synthesis of copper nanoparticles using plant extract


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Created at: Wednesday 03rd of October 2012 06:29:57 AM
Last Edited Or Replied at :Friday 26th of July 2013 08:16:09 AM
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biological synthesis of plant based copper nanoparticles
BIOLOGICAL SYNTHESIS OF COPPER NANOPARTICLES
BIOLOGICAL SYNTHESIS OF COPPER NA..................[:=> Show Contents <=:]



PRODUCTION OF BIOGENIC SILVER NANOPARTICLES USING BOSWELLIA OVALIFOLIOLATA STEM


Posted by: seminar class
Created at: Friday 06th of May 2011 11:11:32 PM
Last Edited Or Replied at :Friday 06th of May 2011 11:11:32 PM
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red at -40c.The supernatant was heated at 500c to 950c.A change in the color of solution was observed during the heating process.
UV-VIS Spectra analysis
The reduction of pure Ag+ ions was monitored by measuring the UV-Vis spectrum of the reaction medium at 5 hours after diluting a small aliquot of the sample into distilled water. UV-Vis spectral analysis was done by using UV-VIS spectrophotometer UV-2450 (Shimadzu).
SEM analysis of silver nanoparticles
Scanning Electron Microscopic (SEM) analysis was done using Hitachi S-4500 SEM machine. Thin films of the sample were prepar..................[:=> Show Contents <=:]



Super critical Fluids and its Applications


Posted by: seminar class
Created at: Tuesday 19th of April 2011 12:16:12 AM
Last Edited Or Replied at :Tuesday 19th of April 2011 12:16:12 AM
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do not demand long processing times, like the case in the traditional methods
Carbon capture and storage and Enhanced oil recovery
• Supercritical carbon dioxide is used to enhance oil recovery in mature oil fields.
• The CO2 is separated from other flue gases either pre- or post-combustion, compressed to the supercritical state, and injected into geological storage, possibly into existing oil fields to improve yields.
Chemical Reactions
• Changing the conditions of the reaction solvent can allow separation of phases for product removal, or single phase for reaction.
•..................[:=> Show Contents <=:]



Nano-Particulate Technology Synthesis


Posted by: seminar class
Created at: Friday 04th of March 2011 12:49:58 AM
Last Edited Or Replied at :Friday 04th of March 2011 12:49:58 AM
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lame Synthesis
Flame Spray Pyrolysis
Low-Temperature Reactive Synthesis
Inert Gas Condensation
Suited for production of metal (e.g., Bi) nanoparticles
Reasonable evaporation rates at attainable temperatures
Procedure:
Heat solid to evaporate it into a BG gas
Mix vapor with a cold inert gas to reduce temperature
Include reactive gas (e.g., O2) in cold gas stream to prepare compounds (e.g., oxides)
Cntrolled sintering after particle formation used to prepare composite nanoparticles (e.g., PbS/ Ag, Si/In, Ge/In, Al/In, Al/Pb)
Pulsed Laser Ablation
Use pulsed laser to vaporize a plum..................[:=> Show Contents <=:]



SUPERCRITICAL FLUID


Posted by: seminar surveyer
Created at: Wednesday 22nd of December 2010 01:03:02 AM
Last Edited Or Replied at :Wednesday 04th of May 2011 07:18:50 PM
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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 ------Extr..................[:=> Show Contents <=:]



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