The air contains 3 mol% CO2, and a 97% recovery of CO2. The air flow rate is 5,000 ft3/minute at 60oF, 1 atm. It may be assumed that the equilibrium curve is Y*= 1:75X, where Yand X are mole ratios of CO2 to CO2-free carrier gas and liquid, respectively. A column diameter of 2.5 ft with 2-inch Intalox saddle packing is assumed for the initial design estimates. Assume caustic solution has the properties of water. Calculate the: (a) minimumcaustic solution-to-air molar flow rate ratio, (b) maximum possibleconcentration of CO2 in the caustic solution, (c) number of theoreticalstages at L/V = 1:4 times the minimum, (d) caustic solution rate, (e) pressure drop per foot of column height , (f) overall number of gas transfer units, NOG, and (g) height of packing, using a KGαof 2.5 lbmol/h-ft3-atm. Is this a reasonable way to get carbon credits?
The air contains 3 mol% CO2, and a 97% recovery of CO2. The air flow rate is 5,000 ft3/minute at 60oF, 1 atm. It may be assumed that the equilibrium curve is Y*= 1:75X, where Yand X are mole ratios of CO2 to CO2-free carrier gas and liquid, respectively. A column diameter of 2.5 ft with 2-inch Intalox saddle packing is assumed for the initial design estimates. Assume caustic solution has the properties of water. Calculate the: (a) minimum
caustic solution-to-air molar flow rate ratio, (b) maximum possible
concentration of CO2 in the caustic solution, (c) number of theoretical
stages at L/V = 1:4 times the minimum, (d) caustic solution rate, (e) pressure drop per foot of column height , (f) overall number of gas transfer units, NOG, and (g) height of packing, using a KGαof 2.5 lbmol/h-ft3-atm. Is this a reasonable way to get carbon credits?
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