0
Micro filtration is used to separate suspended solids from dissolved substances in a process stream. It is also used to concentrate colloidal suspensions.
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
What is the Difference between diffusivity and mass transfer coefficient?
The rate of transfer of a process is equal to the driving force divided by the resistance.The mass transfer coefficient is the resistance to mass transfer. In mass transfer the driving force is the concentration gradient. The mass transfer coefficient is considered anything that contributes to resistance to mass transfer: thermal and eddy diffusivity, distance, etc.Fick's law of diffusion describes convective mass transfer as:N=-c*D*(ca2-ca1)/(z2-z1)where:-c is some constant multiplier (unitless)-The quantity (z2-z1) is the distance between two points. (length i.e. meters)-D is the mass diffusivity or the diffusion coefficient and is dependent on properties of the substance (such as particle size etc.) and temperature. (units: length2/time i.e. m2/s)-The quantity (ca2-ca1) is the concentration gradient between the same two points (the driving force) (units: amount/length3 i.e. mol/m3)-N is the rate of mass transfer (units: mass/(length2*time) i.e. mol/m2*s) )Putting Fick's law in terms of the mass transfer coefficient kc', yields:N=-kc'*(ca2-ca1)where kc'= -c*D/(z2-z1).You can see that the mass transfer coefficient is in fact a function of the diffusivity.
What is the channeling in distillation column?
In distillation coloum the channeling means is the unequal wetting of the packings in the tower. If channeling occurs, poor mass transfer happens, and therefore, less efficiency of the tower happens. AWAIS AFRIDI DEPARTMENT OF CHEMICAL ENGINEERING UNIVERSITY OF GUJRAT...
Why reflux is necessary in distillation columun?
A distillaton column works byh contacting vapor and liquid phases. Without reflux traveling down the column the trays will not have sufficient vapor-liquid contact to induce a mass transfer between the phases, and separation will be poor to non-existent.
How do you calculate ball mill residence time?
mass of mill charge divided by mass flow rate.
Which is a mechanism of heat transfer?
A broad question, so I will give a broad answer. A driving force is needed and what drives heat transfer is simply temperature differences between two bodies. The mechanism at say a molecular level is really just the exchange of the energy from molecules to molecules. Higher energy molecules will collide with lower energy molecules and voila, you have heat transfer.
What is mass transfer?
Mass transfer is the net movement of mass from one location to another
How can you pure water?
you can purify water through several stages of microfiltration.
Furious lows of mass transfer?
The Furious laws of mass transfer is the net movement of mass from one location to another.
What is the difference between heat transfer and mass transfer?
Heat transfer deals with the movement of heat and temperature gradients. The three types of heat transfer are conduction, convection, and radiation. Mass transfer deals with concentrations of a particular substance. Types of mass transfer include diffusion and convection.
When F type mass transfer coefficients are preferred?
mass transfer coefficient in f&k type
What has the author Ernst Rudolf Georg Eckert written?
Ernst Rudolf Georg Eckert has written: 'Introduction to heat and mass transfer' -- subject(s): Transmission, Heat, Mass transfer 'Introduction to the transfer of heat and mass'
Furious lows of mass transfer operation?
The Furious laws of mass transfer operation makes use of the Newton's law for fluid momentum.
Define mass transfer?
Mass- a measure of how much space an object takes up
What has the author Clement Willis Bowman written?
Clement Willis Bowman has written: 'Mass transfer from disperse particles' -- subject(s): Bubbles, Mass transfer
What is the Difference between diffusivity and mass transfer coefficient?
The rate of transfer of a process is equal to the driving force divided by the resistance.The mass transfer coefficient is the resistance to mass transfer. In mass transfer the driving force is the concentration gradient. The mass transfer coefficient is considered anything that contributes to resistance to mass transfer: thermal and eddy diffusivity, distance, etc.Fick's law of diffusion describes convective mass transfer as:N=-c*D*(ca2-ca1)/(z2-z1)where:-c is some constant multiplier (unitless)-The quantity (z2-z1) is the distance between two points. (length i.e. meters)-D is the mass diffusivity or the diffusion coefficient and is dependent on properties of the substance (such as particle size etc.) and temperature. (units: length2/time i.e. m2/s)-The quantity (ca2-ca1) is the concentration gradient between the same two points (the driving force) (units: amount/length3 i.e. mol/m3)-N is the rate of mass transfer (units: mass/(length2*time) i.e. mol/m2*s) )Putting Fick's law in terms of the mass transfer coefficient kc', yields:N=-kc'*(ca2-ca1)where kc'= -c*D/(z2-z1).You can see that the mass transfer coefficient is in fact a function of the diffusivity.
What has the author N Wakao written?
N. Wakao has written: 'Heat and mass transfer in packed beds' -- subject(s): Transmission, Fluidization, Heat, Mass transfer
What is the relationship between the mass of a material and the amount it can transfer?
Heat is transferred based on the temperature of a mass (relative to the cooler mass it is transferring heat to) and the heat capacity of the mass. The total heat capacity is a product of the mass and the specific heat, i.e. Heat capacity = mass x specific heat. The hotter the mass, the more heat it can transfer. The greater the mass, the more heat it can transfer per degree of temperature drop. 100 kg of boiling water could be expected to be able to transfer 100 times the amount of heat of just 1 kg of boiling water for a drop of 1 °C.
