Gas from a petroleum distillation column has its concentration of H2S reduced from 0.03 kmol H2S per kmol inert hydrocarbon gas to 1% of this value by scrubbing with triethanolamine water mixture in a counter current tower of height 7.79m operating at 300K and 1 atm pressure. The equilibrium relation is given by y=2x, where y = kmol H2S per mol inert gas and x=kmol H2S per kmol solvent. Pure solvent enters the tower and leaves it containing 0.013 kmol H2S per kmol of solvent. If the flow rate of gas is 0.015kmolm-2 s -1 and gas phase resistance controls the process, calculate the overall gas absorption coefficient Kga.