Equilibrium curve needed

[moleman1985]

I absolutely need to draw an x,y equilibrium curve for an absorption system. The system is a dryer, the gas feed at the bottom is chlorine with a less than 10% water vapour (solute), the gas is dried so that the water vapour is virtually gone, the solvent used is sulfuric acid, this acid is introduced at the top at 98% wt. and leaves at the bottom at 75% wt. I have done all the mass/mole fractions of all the inlets and out lets and derived an operating line used (x1,y1) and (x2,y2). I need to know how I can draw an equilibrium curve for this system though I am presuming that the mass transfer is constant and that the heat/pressure changes have no effect on the system. What do I have to plot to get this curve?

Gas in at 15oC, out 55oC
Liquid in 30oC, out 55oC
I am assuming no heat transfer, only heating from the reaction/dilution


And if any one would also know how to construct this equilibrium curve with the temperature effect the system that would also be great.

Thankyou.