Question: Determine the diameter and packed height of a countercurrently operated packed tower required to recover 99% of the ammonia from a gas mixture that contains

Determine the diameter and packed height of a countercurrently operated packed tower required to recover 99% of the ammonia from a gas mixture that contains 6 mol% NH3 in air. The tower, packed with l-in. metal Pall rings, must handle 2,000 ft3/min of gas as measured at 68oF and 1 atm. The entering water-absorbent rate will be twice the theoretical minimum, and the gas velocity will be such that it is 50% of the flooding velocity. Assume isothermal operation at 68°F and 1 atm. Equilibrium data are given in Figure 6.49

0.14 X, Y 0.12 Y, X* Y, X1 0.10 | Equilibrium 0.08 curve 0.06 EI Y1, X1 |X, Y¡! 0.04 0.02 -х, ү* 0.02 0.04 0.06 0.08

0.14 X, Y 0.12 Y, X* Y, X1 0.10 | Equilibrium 0.08 curve 0.06 EI Y1, X1 |X, Y! 0.04 0.02 -, * 0.02 0.04 0.06 0.08 0.10 0.12 Moles NH3/mole H20, X Figure 6.49 Data for Exercise 6.32. Moles NH3/mole air, Y

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Entering gas rate is Compute material balance NH 3 in entering gas 006312 1872 lbmolh NH 3 in exiting gas 0011872 019 lbmolh Air in entering and exiti... View full answer

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