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and the refractive index. It is, however, somewhat more complex to use than the Freundlich equation. The Calgon fifth-order polynomial is as follows: The mass loading, we, is calculated from we 0.01G MWads Vm mass loading, i.e., equilibrium adsorptivity (g adsorbate per g carbon)5 carbon loading at equilibrium (cm3 liquid adsorbate per 100 g carbon) liquid molar volume of adsorbate (cm3 per gmole) molecular weight of adsorbate (1.2) where we = G = Vm = MWads = Note that the terms in Equation 1.2 are given in metric units, not English. This has been done because the carbon loading, G, is calculated from a regression equation in which all the terms are expressed inmetricunits. ThisequationforGistheCalgonfifth-orderpolynomial: where where A0 = A1 = A2 = A3 = A4 = A5 = log (G)A AYAY2 AY3 AY4 AY5 10 0 1 2 3 4 5 1.71 -1.46 x 10-2 -1.65 x 10-3 -4.11 x 10-4 +3.14 x 10-5 -6.75 x 10-7 (1.3) and Y is calculated from several equations which follow. ThefirststepincalculatingYistocalculate the parameter X using Equation 1.4: P RT ln Ps i 1.987 (calories per g-mole-K) absolute temperature (K) vapor pressure of adsorbate at the temperature T (kPa) partial pressure of adsorbate (kPa) 2.303 RVm The adsorption potential, Ɛ, is calculated using Equation 1.5: (1.4) (1.5) R = T = Ps = Pi = 5 This, of course, is equal t o lb adsorbate per lb carbon. 1-14PDF Image | Carbon Adsorbers
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