Question 5 In Industrial plants separation units are many and constitute a major cost component towards capital investme

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Question 5 In Industrial Plants Separation Units Are Many And Constitute A Major Cost Component Towards Capital Investme 1 (30.4 KiB) Viewed 27 times

Question 5 In Industrial plants separation units are many and constitute a major cost component towards capital investment and operation costs. A) Briefly describe any two (2) important mass transfer processes in industry [2 marks] B) State the Fick's 1st Law of diffusion [2 marks] C) What is the difference between molecular diffusion and mass transfer? [3 marks] D) A gas mixture at a total pressure of 150 kPa and temperature of 295K contains 20% H₂, 40% O₂ and 40% H₂O by volume. The absolute velocities of H₂. O₂ and H₂O are -10 m/s, -2 m/s and 12 m/s respectively, all in the direction of the z-axis. Calculate: i) ii) The mass flux of O₂ relative to a stationary frame [7 marks] The molar flux of H₂ relative to an observer moving with twice the mixture local molar average velocity at a location in direction opposite to diffusion of H₂ [6 marks]