The adsorption capacity of wax crystals can be estimated in twoways. The first method is based on the Freundlich adsorption theory asshown in Eq. (8). The second method assumes that adsorption capacityof wax crystals conforms to the Langmuir adsorption. Therefore, theadsorption capacity can be described by a Langmuir-type function asshown in Eq. (9).