Polarizability accessible surface areas

Figure 13.5 Decision tree and splitting diagram of partition analysis oftheTRI dataset and an equal randomly selected sample from the Zl NC database. Properties represented (all calculated by QikProp) QPlogPoct = logarithm of octanol-gas partition coefficient QPpolrz = polarizability SASA = solvent accessible surface area). Reproduced with permission [18].

The magnitude and energetics of sorption cary systematically with respect to the molecular properties of the sorbate (polarizability and dipole moment) and the consequential energetic and structural changes induced in the substrate coal. In light of these studies we must question the existence of a fixed, definable pore structure andlor internal surface area of coal. Accessibility is probably a better term to use to define... 

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