Question: Mercury at 26.5 C is flowing through a packed bed of lead spheres having a diameter of 2.096 mm with a void fraction of 0.499.

Mercury at 26.5 C is flowing through a packed bed of lead spheres having a diameter of 2.096 mm with a void fraction of 0.499. The superficial velocity is 0.02198 m/s. The solubility of lead in mercury is 1.721 wt %, the Schmidt number is 124.1, the viscosity of the solution is 1.577 10-3 Pa.s, and the density is 13 530 kg/m3. a) Predict the value of JD. Use this relation for JD: JD = 0.25 NRe-0.31 b) Predict the value of kc for the case of A diffusing through nondiffusing B. Molecular weight of mercury (Hg) = 200.59 kg/kg mol. Molecular weight of lead (Pb) = 207.19 kg/kg mol kc JD = v Nsc2/3 kc C = kc xBM C

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