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WorksheetsAdsorption
Total questions: 25
Worksheet time: 5mins
A purification process is a stage number .........from downstream processing
1
2
3
4
All statements below are TRUE about the purification process. EXCEPT
Expensive to carry out
Easy and fast process
Require sensitive and sophisticated equipment
Require simple equipment
All equipment listed below are commonly used types of equipment in purification step. EXCEPT
Diafiltration
Adsorption
Chromatography
Centrifugation
TRUE statement about the Adsorption process.....
a fluid phase is transferred from one medium to another
a fluid are ransfered to the surface of solid surface
a fluid of liquid are transfered are transfered to the surface of liquid surface
a gasses transferred from one medium to another medium
Application of adsorption process are....EXCEPT
Odour/colour/taste removal
Gas pollutant removal
Soluble liquid removal
Removing moisture from air
Adsorption is a
Bulk phenomena
Surface phenomena
Both
None of these
Rough surface of an adsorbent has
More porus
Non porus
More active centres
Less active centres
In gas masks which substance is used to absorb toxic gases and vapours?
Coal powder
Animal charcoal
Wood charcoal
Activated charcoal
Adsorbate
Material being adsorbed (gas or liquid)
Material that is adsorbing (solid)
Adsorbent
Material being adsorbed (gas or liquid)
Material that is adsorbing (solid)
If the adsorbate and the adsorbent are contacted long enough, an ________ will be established between the amount of adsorbate adsorbed and the amount of adsorbate in solution/gas
Adsorption equilibrium
Titration equilibrium
1.Adsorption is
Exothermic
Endothermic
Both
None
The substance that get adsorbed is called
Adsorbate
Adsorbent
Solid
Liquid
In adsorption from liquid process, choose what type of adsorbent usually use in this unit.
Carbon
Zeolite
Silica
Activated carbon
How adsorption process take place?
separation through liquid and gases
separation through solid
Definition of irreversible adsorption.
Amount of adsorbed is proportional to the concentration in the fluid.
low solid loadings are obtained and because it leads to quite long mass-transfer zones in the bed.
Amount of adsorbed is independent of concentration down to very low values
In adsorption from liquid process, choose what type of adsorbent usually use in this unit.
Carbon
Zeolite
Silica
Activated carbon
Properties of good adsorbent
granular
porous material
high surface area to unit mass
high unit mass to surface area
Choose importance of regeneration to adsorbent.
removal of adsorbent
removal of unknown particles
removal of adsorbates
reduce activation energy of reaction
Define adsorption isotherm.
equilibrium relationship between the concentration in the fluid phase and the concentration in the adsorbate particles
equilibrium relationship between the concentration in the fluid phase and the concentration in the adsorbent particles
equilibrium relationship between the concentration in the gas phase and the concentration in the adsorbent particles
equilibrium relationship between the concentration in the gas phase and the concentration in the adsorbate particles
Identify type of adsorber based on the figure above.
Gas-drying equipment
Vapor phase adsorption
Pressure swing adsorption
Fixed bed adsorber
Which can be used as an adsorbent for removal of moisture and controlling humidity in room?
Silicon
Clay
Silica
Ceramic
Physisorption is held by
Covalent forces
Chemical forces
Vander Waal forces
Centrifugal forces
Chemisorption is held by
Covalent bond
Chemical forces
Van der Waal forces
Centrifugal
FREUNDLICH ISOTHERM is.....
multilayer adsorption
monolayer adsorption
