An absorption column or scrubber is used to remove selected gases by absorption into a liquid. Flue gas primarily contains methane, but contains other gases including hydrogen sulfide and carbon dioxide which must be removed. For simplification, we will assume that the gas entering our absorber contains only methane and hydrogen sulfide and this sour gas (a gas with high levels of H2S or CO2 ) will be scrubbed to a sweet gas (name comes from the improvement in odour when H2S is removed). At a specified height within the column, the partial pressure of H2S in the gas is 4kPa and the mole fraction of H2S in the water is 0.001. - The individual mass transfer coefficient based on equimolar counterdiffusion for the liquid is kx=2.0 moles /(sm2). - Assume a gas film thickness of 0.5mm. - The equilibrium data for H2S-water system is a partial pressure of 0.7MPa for a mole fraction of 0.013 of H2S in water. - The column operates under a pressure of 1000kPa and a temperature of 38C. - Relative to H2S, methane is not significantly soluble in water and it can be assumed that the water is not vapourized. a) Determine the individual mass transfer coefficients for the gas kcoc,ky and ks '. b) Determine the overall mass transfer coefficients for the gas and the liquid Ky and Kx. c) Determine which film, if any, is the controlling film for mass transfer. d) Calculate the flux of hydrogen sulfide at the specified height within the column