the removal of dissolved substances from solution using...
TRANSCRIPT
ADSORPTION
The removal of dissolved substances
from solution using adsorbents such
as activated carbon
The physical form of the GAC may The physical form of the GAC may The physical form of the GAC may The physical form of the GAC may depend on source of raw materialsdepend on source of raw materialsdepend on source of raw materialsdepend on source of raw materials
MANUFACTURE OFMANUFACTURE OFMANUFACTURE OFMANUFACTURE OF ACTIVATED CARBON:ACTIVATED CARBON:ACTIVATED CARBON:ACTIVATED CARBON: DIFFERENT RAW
MATERIALS
Prior carbonization for softer raw materialsPrior carbonization for softer raw materialsPrior carbonization for softer raw materialsPrior carbonization for softer raw materials
MANUFACTURE OF ACTIVATED
CARBON FROM COAL
ACTIVATION
FURNACE
TYPES
Rotary kiln �
Multiple Hearth ↑
DIFFERENT PHYSICAL FORMS DIFFERENT PHYSICAL FORMS DIFFERENT PHYSICAL FORMS DIFFERENT PHYSICAL FORMS
OF ACTIVATED CARBONOF ACTIVATED CARBONOF ACTIVATED CARBONOF ACTIVATED CARBON
First magnification of carbon granules
Continued magnification
Continued magnification
Continued conceptual
magnification
Continued conceptual
magnification
Continued conceptual
magnification
ScanningScanningScanningScanning Electron Electron Electron Electron MicroscopeMicroscopeMicroscopeMicroscope Photo ofPhoto ofPhoto ofPhoto of GACGACGACGAC
Area of a few Area of a few Area of a few Area of a few grams of grams of grams of grams of activated activated activated activated carboncarboncarboncarbon
Application
Methodology
Granular ActivatedGranular ActivatedGranular ActivatedGranular Activated Carbon ColumnsCarbon ColumnsCarbon ColumnsCarbon Columns
GAC SilosGAC SilosGAC SilosGAC Silos
Gas PurificationGas PurificationGas PurificationGas Purification
Contacting
Column
Internals
Typical isotherm solid-phase concentration (y-axis) vs liquid phase concentration (x-axis)
This is a favorable isotherm:
higher solid-phase concentration
at low liquid concentrations
Column Hydraulics
Which of these two “twins”
pioneered adsorption modeling?
Langmuir!
Adsorptive ForcesAdsorptive ForcesAdsorptive ForcesAdsorptive Forces
The effect of molecular size and The effect of molecular size and The effect of molecular size and The effect of molecular size and functional groups on adsorbabilityfunctional groups on adsorbabilityfunctional groups on adsorbabilityfunctional groups on adsorbability
Langmuir isotherm
Freundlich isotherm (linear scale)
Freundlich isotherm, log-log scale
-3
-2.5
-2
-1.5
-1
-0.5
0
-2 -1.5 -1 -0.5 0 0.5
Log C
Log (x/m)
Freundlich isotherm, compared with real data
Four GAC columns in seriesFour GAC columns in seriesFour GAC columns in seriesFour GAC columns in series
REACTIVATION OF ACTIVATED CARBON
Transport of GAC
Decentralized Multiple Hearth
Regeneration Facility