ADSORPTION The removal of dissolved substances from solution using adsorbents such as activated carbon.

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Presentation transcript:

ADSORPTION The removal of dissolved substances from solution using adsorbents such as activated carbon

The physical form of the GAC may depend on source of raw materials

MANUFACTURE OF ACTIVATED CARBON: DIFFERENT RAW MATERIALS

Prior carbonization for softer raw materials

MANUFACTURE OF ACTIVATED CARBON FROM COAL

ACTIVATION FURNACE TYPES Rotary kiln  Multiple Hearth ↑

DIFFERENT PHYSICAL FORMS OF ACTIVATED CARBON

First magnification of carbon granules

Continued magnification

Continued magnification

Continued conceptual magnification

Continued conceptual magnification

Continued conceptual magnification

Scanning Electron Microscope Photo of GAC

Area of a few grams of activated carbon

Application Methodology

Granular Activated Carbon Columns

GAC Silos

Gas 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 Forces

The effect of molecular size and functional groups on adsorbability

Langmuir isotherm

Freundlich isotherm (linear scale)

Freundlich isotherm, log-log scale

Freundlich isotherm, compared with real data

Four GAC columns in series

REACTIVATION OF ACTIVATED CARBON

Transport of GAC

Decentralized Multiple Hearth Regeneration Facility

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