Chemical Engineering - Mass Transfer - Discussion
Discussion Forum : Mass Transfer - Section 1 (Q.No. 1)
1.
Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.
Discussion:
13 comments Page 1 of 2.
Pavan satish Tadi said:
9 years ago
Consider options: (ASSUMED).
Chemical properties are a good option because consider pure component which is in equilibrium with its vapour in the container. Since all molecules are the same type, why are you considering chemical potential?
Consider the degree of turbulence, if the turbulence is more mass transfer coefficient is very high (penetration theory, surface renewal theory, . ).
Physical properties:for example physical properties like solubility is high we will neglect liquid phase mass transfer coefficient.
Interfacial area: if there is more contact area more availability of collisions and diffusion type mass transfer (penetration theory).
Chemical properties are a good option because consider pure component which is in equilibrium with its vapour in the container. Since all molecules are the same type, why are you considering chemical potential?
Consider the degree of turbulence, if the turbulence is more mass transfer coefficient is very high (penetration theory, surface renewal theory, . ).
Physical properties:for example physical properties like solubility is high we will neglect liquid phase mass transfer coefficient.
Interfacial area: if there is more contact area more availability of collisions and diffusion type mass transfer (penetration theory).
(1)
Anjani kumar mishra said:
1 decade ago
Mass transfer is just not an operation in which a mass is transformed or transferred by a chemical reaction but an interaction between two or more different masses by a physical process can lead to mass transfer. For example dust from a gas is absorbed in suitable solvent in gas purification process in absorption column.
(1)
Tanu said:
3 years ago
Mass transfer is that transfer in which transfer of molecules high concentration to lower concentration with the help of a driving force so that no change in chemical properties Only a change in physical property.
In the presence of a driving force so that no change in chemical properties.
In the presence of a driving force so that no change in chemical properties.
(8)
Himanshu neekhra said:
9 years ago
The driving force for the mass transfer is the difference in chemical potential which is a chemical property, so I think it is wrong to say the rate of mass transfer does not necessarily depend on the chemical properties.
Tazebew Simachew said:
5 years ago
We have to remember that mass transfer is a process of transformation of mass from one phase to another phase. As phase transformation is not a chemical change it depend mainly on physical properties of the two phases.
(3)
Bahru said:
4 years ago
Mass transfer is the net movement of mass from a high concentration gradient to a lower one. So the chemical property doesn't affect the mass transfer operation.
(3)
Bahman said:
1 decade ago
Because in some cases there is no reaction between diffusing substance and the absorbing phase. But physical properties always affect.
Suraj negi said:
5 years ago
Because chemical property of fluids is not a role in mass transfer then they not effected.
(1)
Pankaj said:
2 years ago
Mass transfer is a unit operation, not a unit process so no chemical changes will occur.
(12)
Shivam hbtu kanpur said:
1 year ago
I agree Chemical properties is the correct answer.
(1)
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