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#### G. Computer Problems

G1. Do the following problem with a process simulator. A feed gas at 1 atm and 30°C is 90 mol% air and 10 mol% ammonia. Flow rate is 200 kmol/h. The ammonia is being absorbed in an absorber operating at 1 atm using water at 25°C as the solvent. We desire an outlet ammonia in the exiting air that is 0.0032 or less. The column is adiabatic.

a. If N = 4, what L is required (± 10 kmol/h)?

b. If N = 8, what L is required (± 10 kmol/h)?

c. If N = 16, what L is required (± 10 kmol/h)?

d. Examine your answers. Why does N = 16 not decrease L more?

G2. Solve the following problem with a process simulator. We wish to absorb two gas streams in an absorber. The main gas stream (stream A) is at 15°C, 2.5 atm and has a flow rate of 100 ...

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