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Supercritical Fluids - Novel Separation Processes - Lecture Notes, Study notes of Learning processes

some concept of Novel Separation Processes are Asymmetric Membrane, Centrifugal Separation Processes, Cloud Point Extraction, Colloidal Particles, Common Stationary Phase.Main points of this lecture are: Supercritical Fluids, Reduction, Surface Tension, Disadvantage, Supercritical Fluid, Modifier, Solubilize Polar Solutes, Methanol, Corrosive, Explosive

Typology: Study notes

2012/2013

Uploaded on 04/27/2013

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Chapter 10
1. What are the desirable properties of supercritical fluids?
Ans: (a) Liquid like density
(b) Gas like viscosity
(c) Reduction in surface tension
(d) Higher diffusivity than liquids
2. What is drawback of CO2 as supercritical fluid?
Ans: It cannot extract polar solutes.
3. What is disadvantage of NO as supercritical fluid?
Ans: Explosive
4. What is disadvantage of H2O as supercritical fluid?
Ans: High Pc (>220 bar) and Tc(>370 0c) and water becomes corrosive at these
conditions.
5. Name one modifier and mention its role.
Ans: 1-10% methanol in CO2 to solubilize polar solutes.

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Chapter 10

  1. What are the desirable properties of supercritical fluids? Ans: (a) Liquid like density (b) Gas like viscosity (c) Reduction in surface tension (d) Higher diffusivity than liquids
  2. What is drawback of CO 2 as supercritical fluid? Ans: It cannot extract polar solutes.
  3. What is disadvantage of NO as supercritical fluid? Ans: Explosive
  4. What is disadvantage of H2O as supercritical fluid? Ans: High P (^) c (>220 bar) and T (^) c(>370 0 c) and water becomes corrosive at these conditions.
  5. Name one modifier and mention its role. Ans: 1-10% methanol in CO 2 to solubilize polar solutes.