Adsorption of anthracene from cyclohexane on activated alumina follows a Langmuir isotherm, \(\mathrm{q}=22 \mathrm{c} /(1+375 \mathrm{c})\), where \(\mathrm{c}\) is in \(\mathrm{mol} / \mathrm{L}\) and \(\mathrm{q}\) is in \(\mathrm{mol} / \mathrm{kg}\) (Thomas, 1948). Convert this to the form of Eq. (20-6a) in terms of \(q_{\max }\) and \(K_{A c}\) in units of \(g / L\) for \(c\) and \(\mathrm{g} / \mathrm{kg}\) for \(\mathrm{q}\). Range of validity should be from \(\mathrm{c}=0.0\) to \(0.012 \mathrm{~mol} / \mathrm{L}\). Data: See Examples \(20-6\) and \(20-7\)

Example 20-6

Example 20-7

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= 9A9A.max KA.C CA/(1+ KAC CA) (20-6a)