CHE 304

Transport Phenomena III

 Quiz # 3 

Air (Component B) flows in a concentric cylinder.  The diameters of the cylinders are D₁ and D₂.  The inner surfaces of both cylinders are coated with Naphthalene (Component A) layer which has sublimation pressures of P_As. The partial pressure of Naphthalene is P_Ai at the inlet of the cylinder and P_Ao at the outlet of the cylinder.  The cylinder length is L.  Write the governing mass transfer equations for Naphthalene and state all assumptions.  Also, write appropriate boundary conditions to solve for the composition profile of Naphthalene.