Determine the diameter of the tower

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Reference no: EM131310500

An absorber packed to the height of 4.5 m with 1.0-in. Raschig rings has been designed to reduce the concentration level of a mercaptan pollutant in an exhaust stream from 5.0 to 0.3 mol %. A nonvolatile, mercaptan-free solvent stream will be fed to the top of the tower and will flow countercurrent to 0.236 m³ /s of the exhaust gas stream.

The solvent leaves the bottom of the tower containing 3.05 mol % mercaptan. At the pressure and temperature of the tower, 293 K and 1.013×10⁵ Pa, the equilibrium data for the mercaptan-solvent system are as follows:

2105_Table 2.jpg

Determine the diameter of the tower if the gas pressure drop within the packing is limited to 300 N/m³ of packing.

The gas enters the tower with an average molecular weight of 30.1 and the liquid stream, leaving the bottom of the tower, has an average molecular weight of 180, a specific gravity of 0.81 and a viscosity of 3.9×10^-3 Pa.s.

Reference no: EM131310500

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