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Ammonia gas is being absorbed by water in a wetted wall column At one level of the column the following data applies gas phase mass transfer coefficient

Ammonia gas is being absorbed by water in a wetted-wall column. At one level of the column, the following data applies: gas-phase mass transfer coefficient 5.22 × 10–9 kmol m–2 s–1 Pa–1 liquid-phase mass transfer coefficient 3.88 × 10–5 m s–1 Henry's constant 0.955 kPa (kmol m–3)–1. Estimate the overall mass transfer coefficient KL. (b) What is the ratio of the individual mass transfer resistances in Question 2 (a)? (c) Use the following additional information to find the mass transfer flux in the column: mole fraction of ammonia in liquid* 1.351 × 10–3 mole fraction of ammonia in gas* 0.065 total pressure of system 1.013 bar mole mass of ammonia 17 *Note: these values will need to be converted to concentrations in kmol m–3. (d) What is the partial pressure of the ammonia gas at the gas/liquid interface? (e) What is the molar concentration of the ammonia in the liquid at the interface?

 

Jul 24 2020 View more View Less

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