Transport Processes and Separation Process Principles (Includes Unit Operations) Fourth Edition

11.2. SINGLE-STAGE EQUILIBRIUM CONTACT FOR VAPOR–LIQUID SYSTEM

If a vapor–liquid system is being considered, where the stream V₂ is a vapor and L₀ is a liquid, and the two streams are brought into contact in a single equilibrium stage which is quite similar to Fig. 10.3-1, the boiling point or the x-y equilibrium diagram must be used, because an equilibrium relation similar to Henry's law is not available. Since we are considering only two components, A and B, only Eqs. (10.3-1) and (10.3-2) are used for the material balances. If sensible heat effects are small and the latent heats of both compounds are the same, then when 1 mol of A condenses, 1 mol of B must vaporize. Hence, the total moles of vapor V₂ entering will equal V₁ leaving. Also, ...