A 1000 m^3/h stream of gas mixture containing solid particles, and which is

is at 50C and 5 atmospheres of pressure, has the following composition: This stream is fed to a gas scrubbing tower that uses a stream of pure water of 1m^3/h. Tiers to the high solubility of ammonia in water, in dicta

tower practically 100% of the gaseous ammonia is separated, as well as 100% of

solid particles and 20% of sulfur dioxide. Subsequently, the current

gases from the scrubber dome are fed to an absorption column

packed with 40mm plastic Pall rings (see table). the conditions of

operation in the packed absorption tower are 4 atmospheres and 30C. What

solvent pure water is used at 1.8 times the minimum flow. The exit of the gases in the

dome of the absorption column, must contain a maximum of 1% by volume of

sulfur dioxide. For this absorption tower, the flood pressure drop is 9 mmHg/m of packaging.

Viscocity of solvent is 0.8 centipoise and density 1000 kg/m3. To recover the solvent al sulfur diosxide we use stripping 2 atm and 100 celcisus

1) The mole fractions for each gas at the entrance of the absorption column.

2-3) The operating flow of the solvent (L) in kgmol/h that is required in the tower of

absorption.

4) The mass flows in kg/s in the concentrated zone of the column, both for the

gaseous stream as for the liquid stream.

5-9) The diameter of the absorption tower.

10) The velocity of the liquid stream in m/s in the concentrated part of the tower

absorption.

11) The flow in m3/h of gaseous sulfur dioxide separated in the stripping tower.

12) If you will work in the area where Henry's Law is valid, what gas has a

greater Henry's constant in water, NH3, or SO2? Explain and justify.

13-14) Before building the absorption column there was a meeting between the

engineers. Within this meeting, one of them commented that the operation was

1.1 L'minimum, and another, who suggested that L'op=2.5 L'min. What do you think about the

alternatives of each of the engineers? would they be suitable? What would be the

disadvantages? Discuss and conclude with reasons.

15) For his part, another engineer commented that L'op = 2.2 L'min, but he suggested changing

the packaging for another that could be more appropriate, what would that packaging be (see

table and specify)? Explain, discuss and justify.

Porcentaje en mol 10 30 Componente Etano (CzH6) Propano (C3H8) Butano (C4H10) Dixido de azufre (SO2) 30 25 5 Amoniaco NH3 Sie mm, or no. () Bed density kg/m Packing factor, m Normal Dry F, F2 Area mm Ceramics Name voids Hiflow rings 35 50 70 309 405 105 59 52 83 S2 S6 121 95 49 Plastics Pallring 15 55%5%5 40 50 90 95 71 70 60 43 350 206 131 102 85 87 90 91 92 95 320 ISO 131 85 36 345 ISO 131 82 39 131 Super Intalo Flexi-sades, Super-Torus, Novalux 83 60 45 207 108 S9 90 93 96 131 85 46 92 59 75 Porcentaje en mol 10 30 Componente Etano (CzH6) Propano (C3H8) Butano (C4H10) Dixido de azufre (SO2) 30 25 5 Amoniaco NH3 Sie mm, or no. () Bed density kg/m Packing factor, m Normal Dry F, F2 Area mm Ceramics Name voids Hiflow rings 35 50 70 309 405 105 59 52 83 S2 S6 121 95 49 Plastics Pallring 15 55%5%5 40 50 90 95 71 70 60 43 350 206 131 102 85 87 90 91 92 95 320 ISO 131 85 36 345 ISO 131 82 39 131 Super Intalo Flexi-sades, Super-Torus, Novalux 83 60 45 207 108 S9 90 93 96 131 85 46 92 59 75