Solve the following design problem using Excel or Matlab.

An absorber is to be designed to remove a VOC (Volatile Organic Compounds) pollutant from an exhaust gas stream. Fifteen cubic meters per minute of gas at 289 K and 1.013X105 Pa containing 5.0 mol % VOC is fed to the bottom of the absorption tower. By feeding a VOC-free solvent stream to the top of the tower, the VOC concentration is reduced to 0.3 mol %. The solvent stream leaves the tower containing 3.65 mol % VOC. With the specified stream flow rates, the overall masstransfer capacity coefficient, KYa, equals 52.0 mol/s.m2 .YA. The cross-sectional area of the tower is 0.2 m2 . At 298 K, the equilibrium for the VOC-solvent system may be represented by YA = 0.8 XA Determine the height of the tower.