The well-mixed bubbler tank is used to carbonate water. The tank has a volume of 2...

  

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The well-mixed bubbler tank is used to carbonate water. The tank has a volume of 2 m³ and a diameter of 1 m. The process operates at steady state. Pure water (no CO₂) flows continuously into the tank at a rate of 0.45 m³/min (-25 kgmole H₂0/min) and carbonated water (containing dissolved CO₂) continuously exits the tank. Pure CO₂ enters the tank through a sparger at the bottom of the tank. The gas flow rate is 4 m³/min and at 2 atm, 293 K. At these conditions the gas hold-up inside the tank is 0.05 m³ gas/m³ liquid. The average bubble diameter is 2 mm. Density of CO₂ at 293 k and 2 atm=1.951 kg/m³. Fresh water CALL 0 0.45mmin Co, out 100% Co, gas 20 am V-20m² 00 0 000.0 100% CO, pas 20 atm, 293 K 4.0 m/min Assume: Any CO₂ gas not absorbed by water exits the tank. The process temperature is constant at 293K The process is liquid film controlled since pure CO₂ is in the gas phase. Assume no water vapor enters the CO₂ bubbles. Henry's law constant for CO₂ in water = 29.6 atm m³/kgmole. A. What is the liquid film mass transfer coefficient associated with the CO₂ bubbling into the water. B. What is the saturation concentration of dissolved CO₂? Is the inlet flow rate of CO₂ sufficient to ensure that the CO₂ dissolution is mass-transfer limited? C. Develop a material balance for CO₂ in the liquid phase. What is the outlet concentration of dissolved CO2, CAL? The well-mixed bubbler tank is used to carbonate water. The tank has a volume of 2 m³ and a diameter of 1 m. The process operates at steady state. Pure water (no CO₂) flows continuously into the tank at a rate of 0.45 m³/min (-25 kgmole H₂0/min) and carbonated water (containing dissolved CO₂) continuously exits the tank. Pure CO₂ enters the tank through a sparger at the bottom of the tank. The gas flow rate is 4 m³/min and at 2 atm, 293 K. At these conditions the gas hold-up inside the tank is 0.05 m³ gas/m³ liquid. The average bubble diameter is 2 mm. Density of CO₂ at 293 k and 2 atm=1.951 kg/m³. Fresh water CALL 0 0.45mmin Co, out 100% Co, gas 20 am V-20m² 00 0 000.0 100% CO, pas 20 atm, 293 K 4.0 m/min Assume: Any CO₂ gas not absorbed by water exits the tank. The process temperature is constant at 293K The process is liquid film controlled since pure CO₂ is in the gas phase. Assume no water vapor enters the CO₂ bubbles. Henry's law constant for CO₂ in water = 29.6 atm m³/kgmole. A. What is the liquid film mass transfer coefficient associated with the CO₂ bubbling into the water. B. What is the saturation concentration of dissolved CO₂? Is the inlet flow rate of CO₂ sufficient to ensure that the CO₂ dissolution is mass-transfer limited? C. Develop a material balance for CO₂ in the liquid phase. What is the outlet concentration of dissolved CO2, CAL?

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What is the liquid film mass transfer coefficient associated with the CO2 bubbling into the water The volumetric flow rate of CO2 into the water is given by Qco2 in4 m3min At 2 atm and 293 K the densi... View the full answer