| Figure 10 shows the
adsorption isotherm for caprolactam on GAC-F400 using 355-500µm granules. Results showed the GAC-F400 capacity to be around 200 mg/g, which is high. The isotherm showed Redlich-Peterson behaviour. This indicated reversibility properties, i.e. possibility of regeneration; and heterogeneous surface behaviour, which is related to the energy of adsorption and adsorbate distribution on the GAC surface.
Figure 10: Adsorption equilibrium isotherm for caprolactam /GAC-F400 system, under atmospheric conditions.
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